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RotaRy SealS

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Contents

2 Rotary Shaft seals

3 Materials

7 Sealing mechanism

13 Operating parameters

18 Installation housing

25 Installation

26 Special application

28 Storage of elastomer products

29 Overview of Rotary shaft seals

32 Individual description

122 V-Rings

125 Standard dimensions

RotaRy SealS

The purpose of this catalogue is to present standard seals dimensions.

For information about stock availabilities, please contact our sales department.

We are able to supply other dimensions required.

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Rotary shaft seals are used to seal rotating machine elements against media from the inside and/or contamination from the outside. The selection of the correct type of seal is dependent on the operating parameters, e.g. operating medium, operating temperature, peripheral speed, pressure and the ambient conditions on the air side.

The rotary shaft seal consists of an elastomer component, a metal insert and a spring.

The outer surface guarantees secure static sealing and fixes the rotary shaft seal in the housing. The outer sheath can be made of either an elastomer or a metal material. The metal insert provides the rotary shaft seal with the necessary stability. The sealing lip is prestressed by means of a tension spring. This supplies the radial contact pressure of the sealing lip on to the shaft. Optionally, a sealing lip can be used that excludes dirt or dust from the outside.

typesWe distinguish between three basic types. The RS WA type has an elastomer outer sheath that ensures excellent static sealing. The RS WB type is characterised by a metallic outer surface that effects a firm and precise fit in the housing. The RS WC type gives the RS WB type additional rigidity by means of a metal insert, making it more suitable for difficult assembly and hostile operation conditions.

StandardsHubata Seals rotary shaft seals comply with the DIN 3760 standard. You will find design notes and installation guidelines for the sealing partners of the rotary shaft seal in our catalogue on page 18.

areas of applicationRotary shaft seals are used for sealing rotating machine elements, e.g. shafts, hubs, axles in a variety of industries:

in drive technology, e.g. transmission manufacturing, electric motors, internal combustion engines

in pumps

in agricultural and construction machinery, where they are exposed to extreme soiling and guarantee long maintenance intervals and long service life

in household and industrial washing machines (white goods), where materials with high temperature resistance and water and suds tolerance are required

in the wind energy industry, ship-building and rolling mills as particularly large rotary shaft seals

RequirementsThe main purpose of a rotary shaft seal is to ensure reliable and functional leak tightness. At the same time, it should reduce secondary mechanical influences such as friction on the shaft in order to minimise heat development in the immediate vicinity of the seal and thereby loss of power. Furthermore, the simple design of the rotary shaft seal allows problem-free installation and removal.

RotaRy Shaft SealS

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Nomenclature for sealing lip materials:

chemical description Abbreviation DIN ISO 1629

ASTM D 1418

Acrylonitrile butadiene rubber NBR NBR

Hydrogenated acrylonitrile butadiene rubber

(HNBR) HNBR

Fluoro rubber FKM FKM

Ethylene propylene diene rubber EPDM EPDM

Silicone rubber VMQ VMQ

Acrylate rubber ACM ACM

Polytetrafluorethylene

DIN EN ISO 1043-1 PTFE

ASTM D 1600 PTFE

( ) = not listed in the standard

For rotary shaft seals, different standard and special materials are available for the sealing lip (the elastomer component), the metal insert and the tension spring, depending on the type and application in question.

The material used for the sealing lip is usually given. The description of the elastomer materials follows the nomenclature used in DIN ISO 1629 and ASTM D 1418.

The basic material used in elastomer for rotary shaft seals is synthetic rubber manufactured in the chemical industry. Elastomers differ in the basic polymer from which they are made. The nomenclature according to DIN ISO 1629 and ASTM D 1418 is shown in the table below.

The finished material is made by mixing the basic elastomer with the required filler materials, softeners, processing aids, vulcanisation agents, accelerators and other additives.

This procedure makes it possible to set the required material properties and thereby offer standard materials with a wide range of uses, as well as special compounds for highly specific applications.

The rotary shaft seal is formed in a vulcanisation process in which the metal insert is bonded to the elastomer element. The plastic rubber compound assumes a rubbery-elastic state and the rotary shaft seal attains its final mechanical properties. The lip edge is created by subsequent cutting or previously in the moulding tool. Finally, the tension spring is attached.

Materials

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The wide range of rotary shaft seals is available in two standard elastomer materials and two PTFE materials from stock or at short notice:

Standard elastomer materials for rotary shaft seals

Basic elastomer DIN ISO 1629 Hardness [Shore A] Colour Temperature [C]

Acrylonitrile butadiene rubber

NBR 70 black -40 to +100 short term +120

Fluoro rubber FKM 80 brown -30 to +200

Standard PTFE materials for rotary shaft seals Type RS WEPO and RS WCP20

Basic polymer DIN EN ISO 1043-1

Filler materials Hardness [Shore D]

Temperature Type [C]

Polytetrafluorethylene PTFE Carbon/graphite 62 -30* to +205 RS WEPO

Polytetrafluorethylene PTFE Glass fibre/MoS2 60-80 -90 to+250 RS WCP20

*The temperature range is determined by the FKM O-ring used in the RS WEPO.

Standard elastomers

NBR acrylonitrile-butadiene rubber / trade name: e.g. Perbunan (Bayer)

NBR is the most common standard material for rotary shaft seals because of its good mechanical properties and resistance to mineral oil-based lubricants and greases. Good resistance to fuels is usually possible only with special compounds.

Its properties are mainly determined by the acrylonitrile content (ACN between 1 8% and 50%). A low ACN content ensures good flexibility at low temperatures, but offers limited resistance to oils and fuels; as the ACN content increases, flexibility at low temperatures decreases and resistance to oils and fuels improves.

The standard NBR material for rotary shaft seals offers an average ACN content to suit a wide range of applications with balanced properties. It has good mechanical-technological values such as high abrasion resistance, as well as good resistance to mineral oil-based lubricants and greases, hydraulic oils H, H-L, H-LP, non-inflammable hydraulic fluids HFA, HFB, HFC, aliphatic hydrocarbons, silicone oil and greases and water to approx. +80C.

NBR is generally not resistant to aromatic and chlorinated hydrocarbons, fuels with

a high aromatic content, polar solvents, glycol-based brake fluids, and non-inflammable hydraulic fluids HFD.

It has a low resistance to ozone, weather and ageing, but in most applications, e.g. when the material is wetted with oil, this has no negative effect.

FKM fluoro rubber / trade name: e.g. Viton (Du Pont-Dow elastomers)

FKM is noted for its very high resistance to temperatures and chemicals. Other key benefits are its excellent resistance to ageing and ozone, very low gas permeability (excellent for vacuum application) and the fact it is self-extinguishing.

The standard FKM material for rotary shaft seals has excellent resistance to mineral oils and greases, synthetic oils and greases, aliphatic, aromatic and chlorinated hydrocarbons, fuels, non-inflammable hydraulic pressure fluids HFD and many organic solvents and chemicals.

FKM is generally not resistant to hot water, steam, polar solvents, glycol-based brake fluids and low-molecular organic acids.

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In addition to the standard elastomers described, various special elastomers are available for special application conditions.

These include material variants with low friction properties due to antifriction filler materials such as graphite or molybdenite (MoS2) and optimised materials for better resistance to media or high/low temperatures.

Basic elastomer DIN ISO 1629 Hardness [Shore A] Colour Temperature [C]

Hydrogenated acrylonitrile-butadiene rubber

HNBR 70 black -40 to 150

NBR high nitrile NBR 70 black -30 to 100

NBR high temperature NBR 70 black -30 to 120

NBR low temperature NBR 70 black -50 to 90

NBR graphite NBR 70 black -40 to 100

NBR MoS2 NBR 70 black -40 to 100

Silicone rubber VMQ 70 red -50 to 200

Acrylate rubber ACM 70 black -25 to 150

Ethylene-propylene-diene rubber

EPDM 70 black -40 to 130

Further material variants can be produced in other hardnesses and colours.

Special elastomers

hNBR hydrogenated acrylonitrile-butadiene rubber / trade name: e.g. therban (Bayer)

HNBR is obtained by fully or partially hydrogenating NBR. It leads to considerable improvement in resistance to heat, ozone and ageing, and gives it very good mechanical properties, e.g. good resistance to wear. The media resistance compares to that of NBR.

NBR high nitrile with higher aCN content

This material has better resistance to oil and fuels compared to standard NBR.

NBR high temperatureCompared to standard NBR, this material can be used in a higher temperature range and at continuous temperatures of up to +120C.

NBR low temperatureDue to its reduced ACN content this material can be used in a lower temperature range and at continuous temperatures of between -50C and +90C.

NBR graphite / NBR MoS2Due to the addition of antifriction filler materials such as graphite or molybdenite these materials achieve friction-optimised running properties.

PTFE polytetrafluorethylenePTFE is a fluorinated plastic material. It is noted for its almost universal resistance to chemicals, wide temperature range (-90C to +250C), extremely low coefficient of friction, physiological suitability and very high resistance to ozone, weather and ageing. PTFE compounds containing filler materials such as carbon, graphite or glass fibre are generally used for rotary shaft seals.

In rotary shaft seals, PTFE is used for sealing lips, coating on sealing lips and entire rotary shaft seals if high demands are made in terms of resistance to media, thermal resistance, peripheral speed, low friction or high pressure. Hubata Seals offers the RS WEPO type made from PTFE carbon/graphite ex warehouse. The RS WCP20 type with a sealing lip made from PTFE glass fibre/ molybdenite (MoS2) is also available at short notice. Other PTFE compounds such as elastomer rotary shaft seals with PTFE-coated sealing lips are available on request.

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Standard tension springNon-alloyed spring steel acc. to DIN EN 10270-1

exceptionsRS VIA, RS VIAS (FKM standard rotary shaft seals): rust and acid-resistant steel 1.4301 (AISI 304)

RS WEPO (Rotary shaft seal made of PTFE): rust and acid-resistant steel 1.4571

Optionally, other types can also be fitted with the rust and acid-resistant springs 1.4301 (AISI 304) or 1.4571.

Standard materialNon-alloyed steel acc. to DIN EN 10139

Special materialRust and acid-resistant steel 1.4301 (AISI 304)

Materials for tension springs

Materials for metal inserts (housing)

VMQ silicon rubber / trade name: e.g. Silopren (Bayer)

Silicone rubbers are distinguished in particular by their wide thermal application range and excellent resistance to ozone, weather and ageing. Compared to other elastomers, the mechanical properties of silicone are minimal. Generally speaking, silicone materials are physiologically safe, i.e. they are used in food-related and medical areas.

The silicone standard material can be used in a temperature range from -50C to +200C and is resistant in aliphatic engine and transmission oils, animal and vegetable oils and fats. Silicone is not resistant to fuels, aromatic mineral oils, steam, silicone oils and greases, acids and alkalis.

aCM acrylate rubberACM is used mainly by the automotive industry as it is resistant to motor, transmission and ATF oils. In terms of application areas, ACM lies between NBR and FKM. The temperature application range is from -25C to + 150C.

ePDM ethylene-propylene-diene rubber / trade name: e.g. Nordel (Du Pont-Dow elastomers)

EPDM has good resistance in hot water and steam, detergent, natron and potassium hydroxide solutions, silicone oils and greases, many polar solvents, many diluted acids and chemicals, and has a wide thermal application range. EPDM materials offer no resistance with all mineral oil products (lubricants, fuels).

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The primary task of the outer surface of the rotary shaft seal is to ensure static tightness in the housing bore, i.e. the passage of the medium where the rotary shaft seal sits in the housing bore must be prevented in all possible operating conditions.

The outer surface of the rotary shaft seal must also perform other tasks:

Guidance and firm fit of the rotary shaft seal in the bore. A secure seating is guaranteed when the frictional force FR is greater than all the axial forces Fax that are exerted on the rotary shaft seal, e.g. the force resulting from the difference in pressure. The frictional force is the product of the static friction coefficient u0 and the radial normal force FN. The normal force FN is equal to the radial force on the outer surface FA.

Different press fit allowances have to be made to the nominal diameter, depending on the composition of the outer surface (see table Press fit allowances page 9).

Simple and easy installation, requiring chamfers and roundings.

Compensation of the resulting gap by means of different coefficients of thermal expansion.

The selection of the correct outer surface for a rotary shaft seal depends on the specific application and prevailing operating conditions.

Sealing mechanism

Static tightness on the outer surface

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Rotary shaft seals are generally supplied with an elastomer outer sheath and metal outer surface. Combinations of both or special versions are no problem for Hubata Seals. The various types of outer surface are described in the following:

types of outer surface

Rubber-encased outer surface: type RS Wa, RS WaS

Type RS WA rotary shaft seals have a smooth outer surface made of elastomer material, ensuring good static sealing in the housing bore, even in difficult cases. This type is also supplied with a protective lip (RS WAS).

Excellent static sealing

For use in split housings, possibly with edge breakage and/or joint offset

For use in light-metal housing with high thermal expansion (in all housings with a higher coefficient of thermal expansion than steel)

For use in thin fluid or gaseous media

For use in pressure applications

(within the application limits)

Capable of sealing larger surface roughnesses

No fretting corrosion

The housing bore is not damaged during installation and removal

Grooved, rubber-encased outer surface: type RS WaK

To reduce the press-in force and improve static sealing, the elastomer outer surface is grooved along its circumference.

Easier installation because less press-in force is required

Secure static sealing, especially in housings with high thermal expansion, as the grooved, rubber-encased outer surface is made with a higher press-fit allowance

Avoidance of a permanent skew of the rotary shaft seal

Metal outer surface, type RS WB, RS WBS

In the type WB rotary shaft seals the smooth metal outer surface of the metal insert is not encased, but ground, drawn or turned.

A particularly exact (centrical) and firm fit in the bore is ensured

More cost-effective due to the lower elastomer content

The outer surface is made with a tighter press-fit allowance

Good surface quality of the housing bore is required

Not for use in split housings (also only limited use in split housings with paint coating)

In the case of large thermal expansion of the housing, rough bore surfaces, pressure applications or thin fluid, creeping media an additional sealant should be applied to the outer surface (see Additional sealants page 9).

To prevent corrosion, the metal outer surface is coated with corrosion protection oil or a thin layer of wax following final processing.

This type is also supplied with the protective lip (RS WBS).

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Metal outer surface with metal insert: type RS WC, RS WCS

Type RS WC rotary shaft seals have a smooth metal outer surface like type RS WB and an additional metal insert. These seals are used successfully in particularly difficult installation conditions, hostile operating conditions and for large dimensions.

Type RS WC rotary shaft seals have greater rigidity than type RS WB rotary shaft seals.

Due to the additional metal insert the type RS WC is highly insensitive to installation errors.

This type is also supplied with the protective lip (RS WCS).

Partially rubber-encased outer surface: type RS Wa/B

The so-called half-shoulder type is a special design of the outer surface of the rotary shaft seal which is not stocked as standard at Hubata Seals.

This type combines the advantages of the type RS WA rubber-encased outer surface and RS WB metal outer surface, the secure

static sealing and firm seating and exact fit in the bore. Due to the influence of the metal outer surface, good centring is ensured during installation.

The rubber-encased part of the outer surface is grooved, enabling this type to be used successfully in housings with high thermal expansion and in split housings.

additional sealantsIn order to attain high static sealing in the housing bore, rotary shaft seals with a metal outer surface are often coated with paint or sealing compounds. Wax or paint is also applied to protect against corrosion.

The paint should compensate processing marks on the outer surface of the rotary shaft seal, any roughness in the housing bore and more pronounced thermal expansion. It also protects against damage to the housing bore during installation or removal.

The thickness of the paint coating is usually approx. 30 m. When it comes into contact with a medium, volume swell frequently occurs in the paint which provides additional static sealing.

When applying paint to the outer surface, somewhat higher press-in force is required as the paints have a certain adhesive effect.

Paints are supplied in different colours, namely blue, dark red, orange, dark green and light green.

Outer diameter d2 [mm]

Type RS WA

Type RS WAK

Type RS WB, RS WC

50 + 0.3 + 0.4 + 0.2

+ 0.15 + 0.2 + 0.1

> 5080 + 0.35 + 0.45 + 0.23

+ 0.2 + 0.25 + 0.13

> 80120 + 0.35 + 0.5 + 0.25

+ 0.2 + 0.3 + 0.15

> 120180 + 0.45 + 0.65 + 0.28

+ 0.25 + 0.4 + 0.18

> 1 80300 + 0.45 + 0.65 + 0.3

+ 0.25 + 0.4 + 0.2

> 300500 + 0.55 + 0.75 + 0.35

+ 0.33 + 0.45 + 0.23

Outer diameter d2 [mm]

Out-of-roundness tolerance [mm]

50 0.25

> 5080 0.35

> 80120 0.5

> 120180 0.65

> 180300 0.8

> 300500 1

Press-fit allowanceThe rotary shaft seals are manufactured with press-fit allowances at the outer diameter depending on the type. The press-fit allowances are attuned to the ISO tolerance H8 of the housing bore. This ensures a firm fit, moderate press-in and press-out forces and higher static sealing in the housing bore without the need for further measures.

out-of-roundnessThe out-of-roundness tolerance (d2maxd2min) results from three or more measurements distributed evenly on the periphery. The values given must not be exceeded. Within the tolerances, roundness is of secondary importance because the rotary shaft seal adapts to the location bore when it is installed.

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The functional principle of the rotary shaft seal is that the elastomer sealing edge slides on the rotating shaft surface. The sealing edge is pressed in the radial direction against the shaft surface as the inner diameter of the sealing lip is smaller in its non-tensioned condition than the shaft diameter. The difference in diameter is called prestressing.

The resulting radial force on the linear contact zone is additionally supported by a metal screw tension spring to counteract the gradual decrease in radial force as a result of the ageing of the elastomer material (stress relaxation).

The sealing action at the elastomer sealing edge is achieved for two functional states:

for the stationary shaft

for the rotating shaft

It is dependent on the following parameters:

geometry of the sealing lip

properties of the elastomer material

alignment of the screw tension spring

finish of the shaft surface

lubrication condition

Dynamic sealing mechanism

Sealing action with stationary shaftWhen the shaft is stationary the sealing action is based on the radial contact pressure of the sealing lip on the spiral-free ground shaft surface, so that the deformation of the elastomer sealing edge compensates for the surface roughnesses of the shaft and closes the gap. A radial force is exerted on the shaft. The contact pressure of the sealing lip is attained by prestressing and supported by the screw tension spring. The lessening of the elastomer prestress during operation is dependent on the application parameters.

The radial force FR is thus composed of the elastomer component FE and the spring component FF .

Sealing action with rotating shaftWhen the shaft is rotating a hydro-dynamic effect occurs which causes the sealing lip to float on the lubricating film formed by the medium to be sealed. This prevents the premature wear and thermal destruction of the sealing lip.

On the one hand, the wear-inhibiting lubricating film within the contact zone is to be retained and on the other hand, the medium to be sealed is to be prevented from escaping on the air side and resulting in leakage.

Shortly after the start-up of a new rotary shaft seal, micro-protrusions form in the elastomer contact zone in an axial direction. These are deformed as a result of the relative motion between the sealing edge and the shaft.

The alignment of these deformed protrusions is dependent on the distribution of contact pressure in the contact zone and the rotation direction of the shaft.

They create a feed effect (drag flow) from the air side to the medium side of the contact zone that is similar to a micro-threaded shaft pump. The required feed effect of the rotary shaft seal is obtained only if the distribution of the contact pressure of the axial track width is asymmetrical. Only then does the micro-threaded shaft pump feed in the right direction.

The asymmetrical distribution of the contact pressure is attained partly by the different contact surface angles (>) of the sealing lip to the shaft surface and partly by the shifting of the screw tension spring to the air side (spring distance).

Due to the skew of the protrusions the medium in the contact area is fed not only peripherally, but also axially. In addition, with wetting media such as lubricants, the influence of the surface tensions has an effect in the leakage direction. As a result of capillary forces, these media are drawn into the sealing gap and form a cambered interface on the air side known as a meniscus. In the case of a tight rotary shaft seal there is a balance between the forces causing the leakage (pressure difference and capillary force) on the one side and the pumping effect of the elastomer protrusions on the other side.

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friction conditions and lubricationThe interplay of the machine elements shaft, rotary shaft seal and lubricant is to be seen as a tribological system, i.e. three components / materials meet. At a friction point the lubricant is equal to the solid components and has a decisive influence on the operational reliability and service life of the system.

Even at low rotational speeds the medium intrudes into the contact zone due to the capillary forces. The feed of fluid by the capillary forces in the direction of the leakage is essential for the lubrication of the contact zone which is subjected to extreme thermal stress.

Probably the most common condition is mixed film friction between the shaft and sealing lip. Here too, the materials of the two contact surfaces are extremely important.

At higher shaft rotational speeds the friction condition changes from solid state friction through mixed film friction to hydrodynamic fluid friction. The higher rotational speed and the hydrodynamic effect cause the sealing lip to float on the lubricating film formed by the medium to be sealed.

This hydrodynamic lubricating film protects the elastomer sealing edge from premature wear and thermal destruction caused by the existing friction condition. To ensure a long service life it is important to supply the sealing edge with sufficient and continuous lubricating medium. Friction and friction loss are influenced decisively by the radial force, the rotary shaft seal material, the lubricating condition, the peripheral speed, the temperature, the pressurisation and the surface condition of the shaft.

frictional energy: PReIB = fR d/2 2 nPREIB = frictional energy [Watt] FR = radial force [N] = coefficient of friction d = shaft diameter [mm] n = rotational speed [1/min]

This calculation can only serve as an estimate as the coefficient of friction for the individual operating conditions cannot be sufficiently determined.

To keep friction loss to a minimum the lowest possible radial force is applied. However, the radial force must be sufficient to perform the sealing function.

If the required lubricating film under the sealing edge is disturbed, e.g. due to contamination of the medium, damage to the contact surface or too much surface roughness on the shaft, leakage

Some machine elements, e.g. taper roller bearings, angular contact ball bearings and some types of gearwheel, exert a feed effect that can impair the supply of lubricant to the sealing point. Appropriate measures to feed the lubricant, e.g. lubricating ducts and flingers, should therefore be taken in the design stage.

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Dry runUnder no circumstances must the shaft rotate without lubrication on the rotary shaft seal as premature wear to the sealing edge will otherwise occur and the temperature at the sealing edge rises too high as a result of non-functioning heat dissipation.

The sealing edge of the rotary shaft seal should therefore be lightly lubricated prior to installation. Besides acting as a lubricant, the medium to be sealed also has the function of ensuring the continuous dissipation of the frictional heat that occurs.

For dry run application, special types and materials are to be selected, e.g. rotary shaft seal seals with a PTFE sealing lip.

Grease lubricationWith pure grease lubrication, frictional heat is dissipated to a considerably lesser degree than with oil lubrication. It should only be applied to slowly rotating shafts with a peripheral speed not exceeding the permissible values for oil lubrication (see rotational speed table on page 15).

For the sealing of slowly rotating shafts we recommend filling the space between the rotary shaft seal and the bearing almost completely with grease. If no suitable lubricating grease can be applied, a rotary shaft seal with a PTFE sealing lip can be used.

Sealing against poorly lubricating media

When sealing against poorly lubricating media, e.g. water or suds, a maximum of 2/3 of the space between the sealing lip and the protective lip must be filled with grease to ensure sufficient lubrication of the sealing edge. Two rotary shaft seals aligned in tandem with a max. 2/3 grease filling between them and the possibility of relubrication are even more effective.

hydrodynamic sealing aids spiralIf the normal feed effect of the rotary shaft seal is not sufficient, so-called spiral grooves can be used as additional, hydrodynamic sealing aids to increase the functionality of the rotary shaft seal. Spiral grooves are raised return feed grooves that run at a slanting angle from the air side to the sealing edge.

Depending on the rotation direction of the shaft, rotary shaft seals with right or left spiral or with alternating spiral are used. The purpose of the spiral grooves is, in the event of impairment of the normal feed effect, to prevent the medium running to the air side from flowing off as leakage and to bring it back to the sealing edge. Rotary shaft seals with hydrodynamic sealing aids therefore provide double protection against leakage.

The mode of action of the spiral grooves is the same as that of a simple threaded shaft seal. The feed value of single-spiral rotary shaft seal is considerably greater than that of a standard type.

Rotary shaft seals with hydrodynamic sealing aids have improved functionality, particularly in difficult operating conditions, e.g. true running deviations, centricity deviation between shaft and bore and minor damage to the shaft surface.

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Unpressurised operationRotary shaft seals are generally designed for unpressurised operation, i.e. there is no difference in pressure between the spaces to be sealed.

The rotational speed table on page 15 shows the maximum permissible rotational speeds in unpressurised operation with regard to the elastomer material.

Pressurised operationThe load combination of pressure p and peripheral speed V is decisive for the selection of the correct rotary shaft seal.

With pressurised rotary shaft seals the sealing lip is pressed hard against the shaft, thereby increasing the radial force in accordance with the pressure and the effective surface (self-strengthening effect) and thus the sealing action. The sealing capacity of the rotary shaft seal adapts, within certain limits, to the prevalent pressure difference.

However, this process also causes the thermal load and the frictional energy at the sealing edge to increase, which can result in premature wear and hardening. If pressures are too high, the sealing lip can turn over to the air side.

When selecting the elastomer material it is essential to take the higher thermal load of the sealing edge into consideration (overtemperature). The recommended values in the rotational speed table on page 15 for peripheral speed and rotational speed therefore do not apply to pressurised rotary shaft seals.

In pressurised rotary shaft seals (RS WASY) the capability of the sealing lip to absorb both the true running tolerance of the shaft and the centricity deviation between the shaft and the location bore is also reduced.

Pressurised rotary shaft seals must be secured axially on the non-pressure side by means of a housing shoulder, a distance ring or a retaining ring against being pressed out of the location bore.

operating parameters

Pressure

Pressurising with standard typesStandard rotary shaft seals are still suitable for use in very low pressures. They have to seal spaces with small pressure difference against fluids, greases and even air. Pressure differences of max. 0.5 bar can be sealed, depending on the rotational speed.

The following table shows the limit values for pressure dependent on rotational speed and peripheral speed.

Maximum permissible shaft rotational speeds under pressurisation

max. pressure difference [bar]

permissible rotational speeds [1/min]

max.peripheral speed [m/s]

0.5 up to 1000 2.80.35 up to 2000 3.150.2 up to 3000 5.6

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Pressure-loadable type RS Way/RS WaSy

For pressure differences greater than 0.5 bar, pulsating pressures and vacuum applications the type RS WASY is recommended.

This type is fitted with a short, reinforced sealing lip and a drawn-down metal cage (stabilised membrane). This reduces the increase in contact pressure resulting from the pressure and thus also the increased frictional energy and, where applicable, premature wear.

Due to its reinforcement the sealing lip is also prevented, within certain limits, from turning over to the air side if the pressure is too high.

Depending on the rotational speed, the type RS WASY is pressure-loadable up to max. 10 bar (see table).

Pressure difference [bar]

Rotational speed [1/rnin]

max. peripheral speed [m/s]

up to 10 < 500 0.6

4.5 1.000 2.7

2.4 2.000 5.9

1.3 3.000 8.4

0.6 4.000 11.3

Backup ringsPressure differences greater than 0.5 bar can also be sealed with standard rotary shaft seals and an additional backup ring. Such combinations permit pressures of up to approx. 10 bar, depending on the rotational speed.

Only types without protective lips can be used because the backup ring supports the sealing lip under the membrane. The backup ring must therefore be adapted exactly to the sealing lip profile in question. Hubata Seals can supply a drawing of the corresponding backup ring for every standard type (without protective lip) on request.

This kind of sealing system is ideal for applications where pressure-loadable types (RS WASY) are not available.

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According to the following formula, the peripheral speed V of the shaft is the product of the rotational speed n and the shaft diameter d:

Peripheral speed v = (2 n) d/2

v = peripheral speed [m/s] n = rotational speed [1/min] d = shaft diameter [mm]

To prevent function-threatening over-temperatures at the sealing edge that can lead to the hardening of the elastomer or the formation of oil carbon, the peripheral speed must be limited.

The table shows recommended values for material selection, depending on the maximum permissible peripheral speed. The recommended values given are based on experience in accordance with DIN 3760.

Manufacturer-specific properties of the rotary shaft seals such as the geometry of the sealing lip or radial force are not taken into consideration.

These recommended values are valid only for unpressurised operation, adequate lubrication conditions with mineral oil and good heat dissipation at the point of sealing. In the case of insufficient lubrication or pure grease lubrication the limit values are to be halved. The recommended values are also to be reduced for pressurisation, poor surface quality in the contact area and large true running deviations.

For shafts with larger diameters, higher peripheral speeds are permissible than for shafts with smaller diameters as the cross-section of the shaft increases with the square of the diameter. This results in considerably better heat dissipation possibilities.

Permissible rotational and peripheral speeds

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Due to the rotation of the shaft and the resulting friction at the sealing edge, the actual temperature at the sealing edge is higher than in the oil bath.

tD = tl + f

tD = temperature at the sealing edge [C] tl = temperature in the oil bath [C] t = overtemperature [C]

The difference in temperature between oil bath and sealing edge is called over-temperature.

The level of overtemperature is dependent on the following parameters:

peripheral speed

lubrication condition / oil level

heat dissipation

pressure load

surface condition of the shaft

rotary shaft seal material

The higher the peripheral speed, the higher the overtemperature at the sealing edge. Depending on the peripheral speed, the overtemperature can be up to +40C.

If the maximum permissible operating temperatures for the different elastomer materials are exceeded, this leads to premature hardening of the elastomer material and extreme wear.

The permissible operating temperatures for our elastomer materials are given in the tables in the chapter (see Materials page 3). The high temperatures given in the tables refer to the temperature at the sealing edge.

temperature

The selection of the correct rotary shaft seal and particularly of the correct material depends on the peripheral speed of the shaft, the pressure load and the friction-related rise in temperature, but most importantly on the medium to be sealed and its temperature. In particular, the chemical resistance of the rotary shaft seal to the medium used influences the lifespan of the seal to a decisive degree.

Chemical aggression by the medium can lead to

softening of the material due to swelling

or hardening and premature ageing, fostered by high temperatures.

The behaviour of the individual material groups to a variety of media is listed in the Hubata Seals resistance list. If new media are used, if there is any uncertainty or if maximum application parameters (e.g. temperature, pressure, peripheral speed) occur simultaneously, we recommend carrying out a test in advance. A practical test under standard conditions provides the best information on the suitability of a seal. A laboratory test and consultation with the medium manufacturer can also be helpful.

When sealing aggressive media, the types RS VIA/RS VIAS in FKM materials are more suitable for many applications than the types in NBR. Rotary shaft seals made of FKM have higher chemical and thermal resistance.

In addition, the types RS VIA/RS VIAS are already fitted as standard with tension springs made of 1.4301 (AISI 304) rust and acid-resistant steel and the metal insert is fully sheathed in elastomer.

For even higher requirements with regards to media resistance, two types with a PTFE sealing lip or made completely of PTFE are available, namely types RS WCP20 and RS WEPO.

frequently used media: mineral oil-based oils and greases

Generally speaking, seals with NBR and FKM standard materials show good resistance to these media. With highly additivated media for which there are no values taken from experience, a test may be advisable.

Synthetic oils and greasesThe composition of synthetic lubricants is characterised mainly by the base oil and a large number of additives. Depending on the type of base oil and additives, the NBR standard material can be used with less additivated lubricants. With more highly additivated oils, particularly at temperatures above +80C, FKM is more suitable as a sealing material.

Due to the large number and the combination of additives in synthetic lubricants, however, resistance problems may arise. We therefore recommend verifying the suitability of the material in advance by means of testing.

Media to be sealed

17

areas of application for rotary shaft seal materials

Material NBR FKM HNBR NBR High nitrile

NBR High temp.

NBR Low temp.

VMQ ACM PTFE

Low temperature [C] -40 -30 -40 -30 -30 -50 -50 -25 -80

High temperature [C] (no media influence) 100 200 150 100 120 90 200 150 200

Wear resistance 2 1-2 1-2 2 2 2 3 3 3

Media to be sealed /permissible continuous temperatures [C]

Mineral oils

Engine oils 100 150 100 100 120 90 130 130 150

Transmission oils 80 150 80 80 100 70 130 120 150

Hypoid transmission oils 80 140 80 80 100 70 120 150

ATF oils 100 150 100 100 110 80 130 150

Hydraulic fluids acc. to DIN 51524 90 130 90 90 100 80 120 150

Heating oils EL and L 90 150 80 90 90 150

Greases 90 150 90 90 100 80 120 150

Non-inflammable hydraulic fluids VDMA 24317 / 24320

HFA oil in water emulsions 60 60 60 60 HFB water in oil emulsions 60 60 60 60 HFC aqueous polymer solutions 60 60 60 60 HFD non-aqueous synthetic fluids 150 150

Other media

Water 80 80 90 80 80 Suds 80 80 90 80 80

The values given for the high temperatures refer to the maximum temperatures occurring under the sealing lip. Depending on the application, these can be up to +40C above the medium temperature.

1 = excellent 2 = good 3 = moderate

= resistant, but not normally used = resistant to a limited degree = not resistant

18

ShaftBesides the rotary shaft seal, the shaft is a key machine element in the rotation sealing system and must therefore fulfill a number of technical requirements in order to ensure good sealing action.

The correct shaft composition design in the contact surface area of the sealing edge of the rotary shaft seal is very important to the lifespan and the sealing function of the rotation sealing system.

tolerancesThe ISO tolerance field h11 according to DIN ISO 286 is to be applied to the shaft diameter d1 in the contact surface area of the sealing edge of the rotary shaft seal in order to attain the necessary prestressing. Tolerance class IT 8 is valid for the roundness of the shaft.

Surface finish of the shaftThe shaft must be treated circularly in the contact surface area.

The surface roughness, measured longitudinally, should lie within the following ranges:

Ra = 0.2 to 0.8 m Rz = 1.0 to 4.0 m Rmax = 6.3 m

Shaft surfaces that are too smooth (Ra < 0.2 rn) combined with excessive peripheral speeds lead to malfunctions. The supply of lubricant to the sealing edge is impeded, the hydrodynamic lubricating film under the sealing edge is broken and thermal damage to the sealing edge results. Shaft surfaces that are too rough quickly lead to premature wear of the sealing edge. In both cases, serious leakage is the result.

Should axial movements also occur at the rotating shaft, the following roughness depths should be observed to ensure a good sealing action: Ra 0.2 m R

z 0.8 m

Surface hardness of the shaftThe lifespan of the sealing point is also dependent on the surface hardness of the contact surface on the shaft. The surface hardness should be at least 45 HRC.

Should there be influx of contaminated media or dirt from the outside, and with peripheral speeds of 4 m/s, the surface hardness must be at least 55 HRC60 HRC.

In the event of surface hardening, a hardness penetration depth of at least 0.3 mm is required.

Chrome-plated, cadmium-plated, nitrided and phosphated shaft surfaces require special treatment processes. Case by case decisions must be made regarding their suitability. Following nitration the grey layer is to be smoothed. With chrome-plated shaft surfaces the formation of lubricating film is to be determined by subsequent plunge grinding.

Installation housing

19

Contact surface areaThe previously named values for surface finish and surface hardness are to be observed within the contact surface area specified in the table below. The contact surface area is specified in terms of the sealing width b.

b L1 min. L2 min L3 min L4 min

7 3.5 6.1 1.5 7.6

8 3.5 6.8 1.5 8.3

10 4.5 8.5 2 10.5

12 5 10 2 12

15 6 12 3 15

20 9 16.5 3 19.5

treatment of the shaft surfaceThe shaft is treated spiral-free and circularly in the contact surface area of the sealing edge to ensure that no feeding or pumping effect occurs at the sealing point and thereby causes leakage. The correct treatment of the contact surface is very important for the sealing function.

The following treatment methods are used:

Plunge grindingThe most frequently used method is plunge grinding (grinding without axial feed of the grinding wheel) as this produces a completely spiral-free sliding surface. To obtain a high degree of efficiency the sparking out time must be 30 seconds. The grinding wheel is whetted with a multi-grain dresser to ensure that no spiral occurs. During grinding, an integral transmission ratio between the rotational speed of the shaft (e.g. 50 1/min) and the rotational speed of the grinding wheel (e.g. 1 500 1 /min) is to be avoided.

hard turningWhen hard turning, special process parameters such as feed, cutting speed, depth of cut and cutting material must be observed in order to produce a usable sliding surface. The reason for choosing this treatment method is its high cost-efficiency. Other advantages are:

complete treatment in one mounting

short set-up times

fewer production steps

no wheel swarf to dispose of

precisely defined surface structure of the shaft

Turned shafts have a considerable feed effect in one direction, i.e. due to the orientation of the treatment scores (spiral) the oil is fed in one direction, as with a micro-thread. The feed direction is dependent on the rotational direction of the shaft. When selecting the rotary shaft seal it is essential that the shaft can also feed against the sealing direction if the rotational direction changes. For this reason, either hard turning should be used for shafts with only one rotational direction (shaft feed direction towards the oil chamber) or a rotary shaft seal should be selected that is capable of feeding the feed stream created by the hard-turned shaft back into the oil chamber.

The friction torque of rotary shaft seals is comparable to that of ground shafts.

Hubata Seals conducts various test runs with different rotary shaft seal types at a renowned scientific institute. In order to guarantee the maximum possible functional reliability we strongly advise that the selection of seals should be verified by test runs. For further information, e.g. process parameters or test runs, please contact Hubata Sealss development department.

flow turning

Deep-drawn sheet metalOther methods include lapping, honing, grinding with emery, reaming and abrasive blasting. These methods can produce sliding surfaces of only limited correctness for a rotary shaft seal. Sliding surfaces prepared like this should definitely be checked with sufficient test runs.

20

Spiral-freeness of the shaft surfaceIt is essential that the contact surface area of the shaft has been made spiral-free to ensure that no feed or pump effect occurs at the point of sealing, thereby disturbing the functional mechanism of the rotary shaft seal and causing leakage. Spiral-free means that the treatment marks show no orientation such as a rising micro-thread.

Shafts and shaft sleeves can be tested for spiral-freeness using the thread method. To obtain a reliable result, various parameters, e.g. angle of thread contact, rotational speed and weight must be observed. The test thread slides on the wetted, spiral-free contact surface without any change in the axial track. If there is a spiral the test thread moves axially to the left or right, depending on the rotational direction.

Shaft materialCommon tempering steels are suitable as shaft material if the values for the surface hardness are observed.

The formation of corrosion in the contact surface area of the rotary shaft seal is to be avoided. Shafts made of heat-treatable, high-alloy, rust-resistant steel are therefore to be used to seal water or aqueous media. For low peripheral speeds and secondary applications, nonferrous metals can also be used.

Cast iron materials are sometimes suitable as shaft material if they are cavity-free and have a pore size of < 0.05 mm.

In special cases, ceramic layers can be used as shaft material if the surface is sealed and a pore size of < 0.05 mm is ensured. In addition, the required surface finish must be observed and a good bond to the basic shaft material ensured.

Hard chrome-plated shafts are suitable only to a limited degree due to poor formation of the lubricating film and eccentric wear. The formation of the lubricating film can be improved only by subsequent plunge grinding.

Plastic shafts are also suitable only to a limited degree. As plastics have a very low thermal conduction coefficient, the heat dissipation via the shaft is impaired and there is a high rise in temperature at the sealing edge. At and above certain rotational speeds the plastic can soften or melt.

For all shaft surface materials the same applies: the required values for surface finish and hardness must be observed.

If the shaft cannot be made with the required contact surface properties for economic, design or technical manufacturing reasons, corresponding shaft sleeves can be used. Hubata Seals supplies shaft sleeves in all dimensions and various materials and the development department realises them in terms of design.

21

out-of-roundnessThe out-of-roundness or dynamic eccentricity of the shaft should be kept within small tolerances. Otherwise, at high rotational speeds, there is a danger of the sealing lip, due to its inertia, no longer being able to follow the shaft. If this creates too large a gap between sealing edge and shaft on one side, the medium to be sealed escapes and leakage occurs. It is therefore advisable to position the rotary shaft seal in the immediate vicinity of the bearing and to keep bearing play as small as possible. The permissible values for out-of-roundness in terms of rotational speed are shown in the diagram on the left.

Limited values apply to our pressurisable type RS WAY/RS WASY because the sealing lip here is considerably more rigid.

Chamfer on the shaftTwo following designs of the shaft shoulder are suggested: Installation direction Z of the shaft Rounding of the shaft shoulder with r = 0.6 to 1 mm.

Installation direction Y of the shaft Chamfering of the shaft shoulder, recommended angle 15 to 25. The chamfer diameter d3 is listed in the adjacent table.

Damage to the shaftIt is essential that all kinds of damage such as scoring, scratching, dents, cavities, pores or corrosion on the contact surface of the shaft are avoided. This leads to premature failure and leakage. 30% of such failures are caused by incorrect shaft treatment or damage. Shafts should therefore be protected carefully from production to final installation. Transport fixtures or specially moulded or slip-on sleeves made of plastic can be used.

Installation d1

chamfer d3

22

The design of the housing bore is important because the static sealing (second leakage path) by the outer sheath of the rotary shaft seal takes place inside it. To obtain a firm and tight seating in the housing bore it is essential that the following technical requirements are observed:

tolerancesFor the bore diameter d2 the ISO tolerance field H8 in accordance with DIN ISO 286 is to be allowed for in order to obtain good static sealing performance in combination with the press-fit allowance at the outer sleeve of the rotary shaft seals.

housing dimensionsThe axial housing dimensions and the pertaining corner radii are given in the table in relation to the rotary shaft seal height b:

b t1 min. t2 min. R1

7 5.95 7.3

8 6.8 8.3 0.5

10 8.5 10.3

12 10.3 12.3

15 12.75 15.3 0.7

20 17 20.3

Chamfer on the housing boreThe housing bore should have a chamfer of 10 to 20 and the transitions should be free of burs in order to facilitate problem-free installation of the rotary shaft seal.

Surface finish of the housing boreIn order to obtain good static tightness and a secure, firm seating in the housing bore, the following roughness values should be observed:

permissible values for types with rubber outer sleeve RS WA Ra = 1.6 to 6.3 m Rz = 10 to 20 m Rmax 25 m

permissible values for types with metal outer sleeve RS WB, RS WC Ra = 0.8 to 3.2 m Rz = 6.3 to 16 m Rmax 16 m

Rotary shaft seals with metal sheaths and/or application in combination with thin fluid media or gas, a very good surface quality is required, i.e. the surface in the housing bore should be free of damage and treatment marks of any kind, e.g. scratching, scoring, cavities and dents.

housing bore

23

Coaxiality tolerances in the housing bore

The permissible coaxiality tolerance (concentricity deviation) between the housing bore and the shaft/bearing position is shown in the adjacent table. Coaxiality leads to the uneven distribution of contact pressure at the circumference. This results on the one hand in greater strain on the sealing edge which leads to premature wear. On the other hand there is too little contact pressure of the sealing edge on

the shaft which can lead to an impairment of the sealing function and thereby cause leakage. It should be noted that shorter sealing lips (pressurisable type RS WAY/RS WASY) require smaller permissible values. With special elastomers, more flexible sealing lip mountings and longer sealing lips the coaxiality tolerance can be increased. The coaxiality deviation should be kept as small as possible in order to obtain even specific radial force/line pressure.

Materials for housingsThe following materials are used for housings and housing covers/flanges that hold the rotary shaft seal:

steel and heat-treatable steel common in mechanical engineering

cast iron materials, e.g. GGG, GG, GS, GTS

nonferrous metals and nonferrous metal alloys, e.g. G-AlMg

plastics, e.g. thermoplasts and duroplasts

When selecting the rotary shaft seal type and the housing material it is essential to take the heat dissipation coefficient into consideration as this varies greatly in the materials given above.

thermal expansionThe thermal expansion behaviour (thermal expansion coefficient) of the rotary shaft seal and housing materials are of key importance to the static sealing process in the housing bore (second leakage path). During operation, considerable temperature differences can occur that then result in different linear dimensional changes in the different materials. The linear dimensional changes can be calculated using the generally valid law of linear extension:

L = T L0 [mm]

The differences in the thermal expansion coefficients of steel, cast iron materials, nonferrous metals, plastics (thermoplasts) and elastomers are sometimes very large and thus cause various problems. If there is a rise in temperature between a non-ferrous metal or plastic housing and a rotary shaft seal with a metal casing, the prestressing decreases due to the very different thermal expansion coefficients and the seal may be pushed out. The use of rotary shaft seals with rubber casing (e.g. type RS WA) is therefore recommended for nonferrous metal or plastic housings. These are designed with a larger press-fit allowance and can follow the expansion of the housing better because of their much higher thermal expansion coefficient. Rotary shaft seals with a grooved, rubber-encased outer surface (type RS WAK) are designed with an even higher press-fit allowance and can therefore cover even larger gaps. Housings made of steel or cast-iron material in combination with a rotary shaft seal with a rubber outer sleeve offer the greatest advantages from a thermal point of view.

24

Permissible skewThe installed rotary shaft seal must be as central and vertical to the shaft as possible. The right-angle tolerance should not exceed the values in the adjacent table. Larger deviations (skew) lead to a pumping action and have a negative influence on the sealing function. Furthermore, excessive one-sided wear on the sealing lip is to be expected with rough surfaces.

Shaft diameter/mm

Right-angle tolerance/mm

up to 25 0.1

over 25 up to 80 0.2

over 80 0.3

RigidityFor economic reasons, mount housings are frequently designed with very thin walls. When installing rotary shaft seals in thin-walled housing bores or mount housings with low stability there is a danger of the mount housing being considerably enlarged, which can lead to leakage. The enlargement of the housing bore must therefore be kept within the limits possible by the selection of the correct rotary shaft seal type in order to guarantee the wringing fit necessary for static tightness.

We recommend using rotary shaft seals with a rubber sleeve (e.g. RS WA) or applying a larger housing bore tolerance.

Split housingsIn split housings, static tightness can also be obtained at the partition lines with the type RS WA (rubber outer sleeve).

Due to the good elastic deformability of the elastomer and its mould filling capacity, the required static tightness is obtained with the type RS WA. This means that split mount housings with different partition levels and possible offset at the partition lines can also be securely sealed.

25

Correct installation is important. Approximately 30% of all failures and damage to the rotary shaft seals are caused by incorrect installation or unsuitable installation tools. The installation of rotary shaft seals is performed in accordance with DIN 3760.

Prior to installation, the installation space and the rotary shaft seal should be cleaned carefully. Otherwise adherent dirt particles may lead to leakage shortly after operation starts. Please also follow our installation guidelines on catalogue page 18.

Preferably, a hydraulic or mechanical press-fitting device should be used to press the rotary shaft seal into the housing bore. This grips a large area on the outside of the rotary shaft seal, with the result that the force of pressure is exerted as closely as possible to the outer diameter. Please make sure that the press-fitting tool is held in the final position for a while. This reduces spring-back or skew of the rotary shaft seal to a minimum.

If a rotary shaft seal has to be passed over sharp edges, e.g. grooves, threads or shaft ends, appropriate installation sleeves are to be provided. The sleeve must not have any damage such as scratches or rough surfaces.

To guarantee a firm fit it must be ensured that the outer sheath rests completely against the inside of the housing bore. If the front chamfer of the rotary shaft seal protrudes slightly over the housing chamfer, the seating proportion is reduced, which can cause the rotary shaft seal to wander in the bore. If the space between the protective lip and the sealing lip is filled with grease, a defined application is to be provided. Application aids such as brushes can leave function-impairing residue behind on the seal. The space should be filled to a maximum of 2/3 with grease.

Installation

d1 dk

6 - 60 d1 - 3.5

65 - 135 d1 - 4.5

140 - 170 d1 - 6

RS WCP20The diagram shows the secure installation of the RS WCP20. To install the RS WCP20 over a chamfered shaft an installation cone is to be used so that the sealing lip is guided and not folded over.

When installing the RS WCP20 with the outside at the front, bevelling or rounding must be performed. Otherwise, the general installation guidelines for rotary shaft seals apply.

26

Sealing against negative pressure or vacuum

To seal a shaft against negative pressure, rotary shaft seals are used which correspond to the pressure gradient with the sealing lip on the air side. When grease is used, the outer rotary shaft seal must also be used with the sealing lip on the air side. Image a) and b)

To ensure lubrication of the sealing lip and to support the sealing action a confining medium should be used between two rotary shaft seals. If a liquid confining medium is used, the rotary shaft seals are installed with the sealing lips facing each other. Due to the negative pressure gradient the inner seal is pressurised by the confining medium. Here we recommend the use of our type RS WASY. Image c)

Separating two mediaTo separate two spaces containing different media, two rotary shaft seals are used back to back, i.e. with the sealing lips facing in opposite directions. We recommend making a leakage bore-hole in the space between the rotary shaft seals. Another possible way of separating two media at low to medium peripheral speeds is to use our type RS WAD which combines two back-to-back sealing lips in one seal. The space between the two sealing lips should be filled with grease during installation.

Special applications

27

Sealing with excessive external dirt formation

External dirt leads to premature wear of the sealing and the shaft surface. Depending on the type and quantity of the dirt occurring, the sealing lip should be protected.

The simplest solution is to use type RS WAS with its outward-facing protective lip. The space between the sealing lip and the protective lip should be filled to a maximum of 2/3 with grease during installation.

If external dirt formation is excessive, a AXS VRM axial seal can be connected in series to the rotary shaft seal. This AXS VRM ring rotates with the shaft and propels the dirt away directly. In addition, the AXS VRM ring seals against an axial housing surface with its elastomer lip (possibly directly against the rotary shaft seal type RS WB).

In extreme conditions, e.g. in agricultural and construction machinery, cassette seals are used. These seals are fully encapsulated and on the inside they form a grease-filled labyrinth with several protective lips. In this way the penetration of dirt is effectively prevented. The cassette seals also contain the completely pre-treated seal contact surface.

Sealing with contaminated mediaContaminated media or media with abrasive contents cause intensive wear in the sealing area. Particularly with vertical shafts, the lower seal is severely subjected to sinking particles. Connecting a second seal in series and/or using our axial seal AXS VRM solves this problem.

28

Generally speaking, elastomers are suitable for storage. They remain almost unchanged in their properties for years, provided that certain minimum requirements regarding storage conditions are observed. These are described in DIN 7716 and ISO 2230.

The seals must be stored stress-free, i.e. without tension, pressure or other forms of deformation.

The seals should be protected from excessive ventilation, especially draughts. Storage in packaging, e.g. polythene bags or airtight containers, is recommended.

The storage location should be cool, dry, dust-free and moderately ventilated.

A constant storage temperature is optimal. It should be no lower than -10C and no higher than +20C.

Heaters in storage rooms should be screened and placed at a distance of at least 1 m from the stored goods.

Relative humidity should not exceed 65%. Strong light, especially UV rays and direct sunlight should be avoided.

Electrical devices that produce ozone should not be placed in storage rooms for elastomers.

Storage of elastomer products

29

overview Rotary shaft sealsProfile

Descr. Temp. (C)

Speed (m/s)

Materials Dimensions metr. inch

Page

RS WA Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10270-1

32

RS WAS Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10270-1

32

RS VIA Rotary shaft seal

-30 +200

35 FKM80/ steel 1.4301

63

RS VIAS Rotary shaft seal

-30 +200

35 FKM80/ steel 1.4301

63

RS WB Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10270-1

74

RS WBS Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 101 39

74

RS WC Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10139

86

RS WCS Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10139

86

RS WAO Rotary shaft seal

-40 +100

6 NBR70/ steel DIN EN 10139

96

RS WBO Rotary shaft seal

-40 +100

6 NBR70/ steel DIN EN 10139

96

RS WAK Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10270-1

ASK

RS WAG Rotary shaft seal

-40 +100

12 NBR70/ steel DIN EN 10270-1

ASK

30

overview Rotary shaft sealsProfile

Descr. Temp. (C)

Speed (m/s)

Materials Dimensions metr. inch

Page

RS VIAK Rotary shaft seal

-30 +200

35 FKM80/ steel DIN EN 10270-1

ASK

RS VIAG Rotary shaft seal

-30 +200

35 FKM80/ steel DIN EN 10270-1

ASK

RS WAY Rotary shaft seal

-40 +100

12 NBR80/ steel DIN EN 10270-1

101

RS WASY Rotary shaft seal

-40 +100

12 NBR80/ steel DIN 10270-1

101

RS VIAY Rotary shaft seal

-30 +170

35 FKM80/ steel DIN EN 10139

104

RS VIASY Rotary shaft seal

-30 +170

35 FKM80/ steel DIN 10139

104

RS WAX Rotary shaft seal

-40 +100

10 NBR70/ steel DIN EN 10270-1

ASK

RS WAD Rotary shaft seal

-40 +100

6 NBR70/ steel DIN EN 10270-1

106

RS WBD Rotary shaft seal

-40 +100

6 NBR70/ steel DIN EN 10270-1

106

RS WCP20 Rotary shaft seal

-90 +250

40 PTFE/glass fibre/MOS2 steel DIN 1.4404

108

RS WCL Rotary shaft seal

-40+100 -30+200

12/15 NBR75/FKM75/ steel DIN 1.4404

111

RS WE5 Rotary shaft seal

-30+100 -20+200

20/25 NBR80/FKM80/ fabric/steel 1.4301

ASK

31

overview Rotary shaft sealsProfile

Descr. Temp. (C)

Speed (m/s)

Materials Dimensions metr. inch

Page

RS WE6 Rotary shaft seal

-30+100 -20+180

20/25 NBR80/FKM80/ fabric/steel 1.4301

ASK

RS WE7 Rotary shaft seal

-30+100 -20+180

20/25 NBR80/FKM80/ fabric/steel 1.4301

ASK

RS WEPO Rotary shaft seal

-20 +205

15 PTFE/carbon/graphite/ steel 1.4571

116

AXS VRM1 Axial seal

-40+100 -30+180

12 NBR70/FKM80 steel 1.0204

119

AXS VRM2 Axial seal

-40+100 -30+180

12 NBR70/FKM80 steel 1.0204

119

32

RS Wa/RS WaS

Rotary shaft seal in standard design according

to DIN 3760 with an elastomer outer sheath

covering a metal insert as well as a spring-

energised sealing lip. In addition, the standard

design is available with a protective lip (RS WAS)

on the air side.

Standard materialsNBR70 Colour: black

Energised spring: non-alloy spring steel

according to DIN EN 10270-1

Metal insert: non-alloy steel according to DIN

EN 10139

areas of applicationSealing of rotating machine elements such as

shafts, hubs and axles.

functionThe RS WA/RS WAS is a single action rotary shaft

seal for rotating or pivoting shafts with optional

protective lip sealing action (RS WAS) on the

side facing away from the medium, against dirt

accumulation from the outside. The elastomer

outer sheath provides good static sealing, good

thermal expansion balance e.g. in light-metal

housings, better sealing with greater roughness

and secure sealing for split housings as well as

good static sealing with thin fluid or gaseous

media.

MediaGood chemical resistance to many mineral

oils and greases. Please also refer to our media

resistance tables on page 17 of this catalogue.

operational application limitsPressure (Mpa/bar): 0.05/0.5

Temperature (C): -40 to +100

Peripheral speed (m/s): 12

Please also refer to our rotational speed

diagram on page 15 of this catalogue.

InstallationSuitable tools should be used for installation. It

is recommended that the installation housing is

designed to provide the rotary shaft seal with

axial support. Please also refer to our general

installation instructions on page 25 of this catalogue.

RemarksThe nominal widths mentioned on the following

pages represent the standard dimensions.

Other dimensions and different designs, e.g.

double dust protection lip, spiral on the sealing

lip, springs or metal cases made of other steel

grades can be produced as well as all kinds

of special designs. Minimum quantities may

be obligatory for dimensions outside of the

standard.

33

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

4 11 64 12 64 16 64.8 22 75 13 75 15 65 15 75 16 65 16 75 18 76 13 4.56 14 66 14.1 46 15 46 15 66 16 56 16 66 16 76 17 66 18 56 18 66 18 76 19 66 19 76 22 76 22 86 26 77 14 57 15 57 16 77 18 77 19 67 22 77 22 88 14 48 15 58 15 78 15 88 16 48 16 68 16 78 18 58 18 68 18 78 20 58 20 78 20 88 22 68 22 78 22 88 22 108 24 78 30 78.5 18 89 16 49 16 59 18 69 18 79 19 49 19 59 19 79 22 79 24 79 26 79 30 79.5 19 6.39.5 25.4 89.8 20 510 15 610 16 4

10 16 510 16.5 410 17 510 17 610 18 410 18 510 18 610 18 910 19 410 19 6.510 19 710 19 810 20 410 20 510 20 610 20 710 21 510 22 610 22 710 22 810 24 710 24 1010 25 610 25 810 26 710 28 710 30 710 30 810 30 1011 17 411 18 411 19 511 19 711 21.5 511 22 711 22 811 23 811 26 611 26 711 30 711 30 811 30 1012 18 4.512 18 512 19 412 19 512 20 412 20 512 20 712 21 412 21 512 22 412 22 4.512 22 512 22 612 22 6.512 22 712 22 812 24 4.512 24 612 24 6.512 24 712 24 7.512 24 812 24 1012 24.5 5.512 25 4.512 25 512 25 612 25 7

12 25 812 26 612 26 6.512 26 712 26 812 28 512 28 712 28 812 30 512 30 612 30 712 30 1012 32 512 32 712 32 1012 35 4.312 35 712 35 1012 37 1012 38 1012 45 712 52 712.3 32 512.5 19 512.5 20 512.5 20 612.5 20.5 512.5 22 512.7 26 613 19 313 22 413 22 513 22 613 24 713 25 413 25 513 25 713 26 513 26 713 26 913 28 713 30 513 30 713 30 813 30 1013 32 613 32 713 35 1013.5 32 513.7 22 513.7 24 513.8 26 714 20 514 21 414 22 414 22 514 22 714 23 614 24 514 24 614 24 714 24 814 25 514 25 614 25 714 25 814 26 714 28 614 28 714 28.5 10

34

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

14 30 714 30 814 30 1014 32 514 32 714 32 1014 34 714 35 4.514 35 714 35 814.8 30 514.8 30 715 21 415 21 4.415 21 515 22 715 24 515 24 715 24 915 25 515 25 615 25 715 25.5 515 25.5 715 26 4.515 26 615 26 715 26.5 4.615 27 715 28 415 28 615 28 715 28 815 28 1015 30 4.515 30 515 30 5.515 30 615 30 715 30 815 30 1015 32 515 32 5.515 32 715 32 815 32 915 32 1015 33 715 35 515 35 715 35 815 35 1015 37 715 37 1015 40 1015 42 715 42 1015.3 22 715.6 25 716 22 416 22 716 22.2 416 24 516 24 616 24 716 25 716 25.5 616 26 516 26 616 26 7

16 26 816 28 616 28 716 29 6.516 29 9.516 30 4.516 30 716 30 816 30 1016 32 616 32 716 32 816 32 1016 33 816 33 1116 35 616 35 716 35 816 35 1016 36 716 38 716 40 516 40 716 40 1016 42 616.5 32 916.9 28 517 24 717 25 417 25 717 26 617 26 717 27 517 27 617 27 717 27 1017 28 517 28 617 28 717 28 817 28.5 617 29 517 30 517 30 617 30 717 30 817 31 717 32 517 32 717 32 817 32 1017 33 817 34 417 34 717 34.5 417 35 517 35 617 35 717 35 817 35 9.517 35 1017 37 417 37 717 37 817 37 1017 38 717 38 817 38 1117 40 617 40 7

17 40 817 40 8.517 40 1017 42 517 42 717 47 717 47 817 47 1017 47 1117.5 20 617.5 28 617.8 26.2 3.518 24 518 25 518 26 618 27 518 28 418 28 518 28 618 28 718 30 518 30 618 30 718 30 1018 32 4.718 32 618 32 718 32 818 32 1018 35 518 35 618 35 718 35 818 35 1018 36 718 37 618 37 818 38 518 40 718 40 1018 42 818 42 1018 44 818 47 1018.5 40 518.9 30 518.9 30 719 26 5.519 27 619 29 519 29 6.519 30 519 30 619 30 719 30 819 30 1019 32 519 32 619 32 719 32 1019 34 619 35 719 35 819 35 1019 36 719 36 819 37 1019 38 9.519 38 1019 40 8

35

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

19 40 1019 44.5 819 47 1019 53 7.519.3 30 4.719.5 28 619.6 33 920 26 1020 28 4.520 28 520 28 620 28 720 30 4.520 30 4.620 30 520 30 620 30 720 30 820 30 920 31 720 32 520 32 620 32 720 33 820 33 920 33 1020 34 620 34 720 35 520 35 5.320 35 5.520 35 620 35 720 35 820 35 1020 35 1220 35.5 1020 36 520 36 620 36 720 37 720 37 820 37 1020 38 520 38 620 38 720 38 820 38 920 40 520 40 620 40 720 40 8.520 40 920 40 1020 40 1120 40.2 620 41 820 41.2 620 42 720 42 1020 43 7.520 45 1020 45 1220 46 620 47 720 47 820 47 8.520 47 920 47 9.520 47 10

20 47.5 720 48 920 48.4 720 52 720 52 820 52 1020 52 1220 57 820 60 1020 62 6.520 72 520 72 1021 30 6.521 32 521 32 721 35 621 35 721 35 821 35 1021 37 721 40 521 40 1021 48 821 52 821.3 32 522 30 722 30 1022 31 522 31.8 522 32 422 32 522 32 5.522 32 722 32 1022 33 722 34 722 35 5.522 35 5.622 35 622 35 6.522 35 722 35 822 35 1022 36 622 36 722 37 722 38 622 38 722 38 822 40 622 40 722 40 822 40 8.522 40 1022 42 522 42 722 42 1022 42 1122 45 722 45 822 45 1022 47 722 47 1022 48 522 48 1022 50 1023 35 623 35 723 37 623 37 7

23 38 723 38 823 40 823 40 1023 42 1023 52 1224 32 524 34 5.524 35 624 35 724 36 624 36 724 37 724 38 724 38.5 1024 39 824 40 724 40 824 40 1024 40 1124 40 1224 42 724 42 824 42 1024 44 624 44 724 47 724 47 1024 48 1024 50 1024 52 1024 62 724.5 33 524.5 40 8.524.9 45 6.525 32 625 32 725 33 425 33 625 35 525 35 725 35 825 35 925 35 1025 36 725 36 1025 37 525 37 625 37 725 37 825 38 525 38 725 38 825 38 1025 39 925 40 525 40 625 40 725 40 825 40 1025 40 1125 42 625 42 6.525 42 725 42 825 42 8.525 42 925 42 1025 42.9 9.525 43 9

36

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

25 44 725 44.5 1025 45 725 45 1025 45 1125 46 725 47 625 47 725 47 825 47 1025 48 825 50 725 50 1025 50 1225 51 1125 52 525 52 6.425 52 725 52 825 52 1025 52 1225 52 1525 54 725 55 1025 58 1025 60 725 62 525 62 725 62 825 62 1025 72 726 35 526 35 726 36 726 37 726 37 1026 38 526 38 726 40 626 40 726 40 926 42 626 42 726 42 826 42 1026 42.7 1026 45 726 47 526 47 726 47 1026 48.5 1126 50 1026 52 826 52 1026.5 47 727 35 427 35 727 35 7.527 37 727 38 627 38 727 40 627 40 727 40 1027 41 1027 41.2 827 41.2 9.527 42 727 42 1027 43 9

27 45 727 45 827 47 627 47 827 47 9.827 47 1027 50 1027 52 827 53 727.8 38 728 35 528 37 828 38 528 38 5.528 38 628 38 728 38 828 40 528 40 728 40 828 40 928 40 1028 42 728 42 828 42 1028 42.5 828 42.9 9.528 43 728 43 928 43 1028 44 1028 45 528 45 628 45 728 45 828 45 928 47 528 47 728 47 828 47 1028 48 528 48 1028 48 1128 50 828 50 1028 50 1228 52 528 52 728 52 1028 52 1228 52.4 12.528 55 1028 57 1228 62 1028 62 1229 38 629 39 529 40 729 41 529 41 629 42 729 43 729 45 729 45 829 45 929 45 9.529 46 1029 47 1029 48 1029 50 10

29 50 1229 52 929 55 929 62 1030 36 530 37 430 40 530 40 730 40 830 40 930 40 1030 41 6.330 42 4.530 42 5.730 42 630 42 730 42 830 42 1030 42 1230 43 830 44 730 44 830 44 1030 45 530 45 5.530 45 630 45 730 45 830 45 1030 45.2 1030 46 530 46 830 46 1030 47 530 47 630 47 730 47 830 47 1030 48 830 48 1030 49 930 49.5 1030 50 530 50 730 50 830 50 1030 50 1130 50 1230 52 430 52 530 52 630 52 730 52 830 52 8.530 52 1030 52 1230 54 1030 55 630 55 730 55 1030 55 1230 56 730 56 830 56 1030 56 1230 57 830 60 1030 62 530 62 6.530 62 7

37

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

30 62 830 62 1030 62 1230 65 830 65 1030 70 1030 72 1031 41 531 44.5 531 44.5 831 47 731 47 1031 52 631 52 731 52 831 52 931 55 931.5 40 731.5 47 731.5 52 732 40 532 40 732 42 532 42 632 42 732 42 932 44 732 44.5 1032 45 632 45 732 45 832 45 1032 46 732 46 1032 47 732 47 832 47 1032 47.5 632 48 532 48 732 48 832 48 932 48 1032 50 732 50 832 50 1032 50 1232 51 832 51 932 51 9.532 51 19.532 52 532 52 732 52 7.532 52 832 52 932 52 1032 52 1232 54 832 55 1032 56 1032 56 1232 57 1232 57.15 732 62 632 62 832 62 1032 62 1232 66 1032 70 8

33 43 733 45 733 47 1133 47.5 7.533 48 1233 50 633 50 733 50 833 50 1033 52 633 52 833 52 1033 55 1033 56 1234 44 634 44 734 45 734 46 834 46 1034 47 934 47 1234 48 734 48 834 49.3 9.534 50 834 50 1034 51 834 52 7.534 52 834 52 1034 52 1134 55 634 55 934 58 1334 62 1034 72 1034.5 47 735 42 835 43 635 44.5 535 44.7 835 45 535 45 635 45 735 45 1035 45 1235 46 6.535 47 4.535 47 535 47 635 47 735 47 835 47 1035 47.3 735 47.5 835 48 835 48 935 50 535 50 735 50 835 50 1035 51 835 52 735 52 835 52 8.535 52 8.835 52 935 52 1035 52 1235 53 7

35 53 835 54 835 54 1035 55 535 55 735 55 835 55 1035 55 1135 55 1235 55.5 935 56 835 56 1035 56 1235 57 1035 58 735 58 7.535 58 1035 58 1235 59.5 1235 60 535 60 835 60 1035 60 1235 62 535 62 735 62 835 62 1035 62 1235 64 835 65 935 65 1035 65 1235 67 735 68 635 68 1035 68 1235 72 735 72 1035 72 1235 80 835 80 1035 80 1235 80 1335.7 63.3 9.335.8 68 1036 47 736 48 1036 48 1236 50 736 50 1036 52 536 52 6.536 52 736 54 6.536 54 736 54 7.536 54 1036 55 836 56 636 56 1036 58 936 58 1036 58 1236 59 9.536 62 736 62 1036 68 1036 75 1236 83 1237 50 10

38

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

37 52 737 52 837 52 1037 58 1337 62 837 62 1037 62 1137 62 1237 72 1237.5 52.4 838 47 738 48 638 48 738 50 738 50 838 50 1038 52 738 52 838 52 938 52 1038 53 838 54 6.538 54 1038 55 638 55 738 55 1038 55 10.538 55 1138 55.5 938 56 738 56 1038 56 1138 56 1238 57 1038 57.5 838 58 538 58 838 58 1038 58 1138 58.5 738 60 1038 60 1238 62 738 62 838 62 938 62 1038 62 11.538 62 1238 64 1238 65 838 65 938 65 1038 70 1238 72 1038 72 1238 74 1038 75 538 80 1038 80 1239 51 7.539 52 839 55.9 939 65 939.7 61.9 839.7 80.4 1540 50 540 50 740 50 840 50 940 51 5.5

40 52 540 52 640 52 740 52 840 52 8.540 52 1040 53 8.540 54 740 55 6.540 55 740 55 840 55 1040 55 1240 56 740 56 840 56 940 56 1040 56 1240 57.15 1040 58 740 58 840 58 940 58 1040 58 1240 60 740 60 840 60 1040 60 1240 61 1040 62 540 62 6.540 62 740 62 840 62 1040 62 11.540 62 1240 62 1440 63 640 63 1040 63.6 12.740 65 940 65 1040 65 1240 68 640 68 740 68 840 68 1040 68 1140 68 1240 70 840 70 1040 70 1240 72 740 72 1040 72 1240 75 740 78 1040 80 740 80 840 80 1040 80 1240 80 1340 85 1040 90 840 90 1040 90 1240 110 1241 52 841 55 8.541 56 7

41 56 7.441 56 841 56 1041 63 641 63.5 1042 50 742 50 1042 52 542 52 842 52.5 742 55 742 55 842 55 942 55 1042 56 542 56 642 56 742 57 742 58 742 58 842 58 1042 58 1242 58.5 1042 60 742 60 842 60 942 60 1042 60 1242 62 6.542 62 742 62 842 62 1042 62 1242 64 742 65 842 65 1042 65 1242 68 1142 68 11.542 70 842 70 1042 70 1242 72 842 72 1042 72 1242 80 1042 81 1343 53 543 54 7.543 55 743 59 543 60 1043 62 1043 65 843 65 1343 66 1043 66 1243 75 1043 80 1044 52 1044 54 4.544 54 7.544 55 744 58.5 1044 60 944 60 1044 62 844 62 1044 63.5 1144 65 10

39

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

44 66 1344 70 1044 72 1044 73 1244 78 1244 100 1244.5 62 1044.5 62 11.545 50 545 52 845 55 745 55 845 55 1045 56 645 56 745 57 745 57 7.545 58 745 58 845 59 845 60 6.545 60 745 60 845 60 1045 60 1245 61 945 61 1245 62 745 62 845 62 945 62 1045 62 1245 64 9.545 65 645 65 745 65 845 65 945 65 1045 65 1245 66 645 66 945 66 1045 68 845 68 1045 68 10.845 68 1245 68 12.545 68.2 1245 69.1 1245 70 1045 70 1245 70 1445 72 745 72 845 72 945 72 1045 72 1245 75 645 75 845 75 1045 78 1345 80 1045 80 1345 85 1045 85 1345 90 1045 100 1046 62 946 64 846 72 10

46 78 1046.2 80 1047 58 647 58 747 62 647 62 847 65 847 65 947 65 1047 67 1247 68 647 72 947 72 1048 55 448 58 448 60 648 62 748 62 848 62 1048 62 1248 63 1148 65 848 65 1048 65 1248 66.8 9.848 68 1048 68 1248 70 848 70 948 70 1048 70 1248 72 748 72 848 72 948 72 1048 72 1248 72.5 1048 74 1048 75 848 80 848 80 1048 80 1348 85 648 85 1048 85 1348 90 1048 90 1249 65 1049 68 749 68 1249 70 9.549.5 60 850 58 4.550 59 450 60 750 60 850 60 1050 62 750 62 850 62 1050 64 1050 65 750 65 850 65 1050 65 1250 66 7.9350 66 850 66 1050 67 950 68 8

50 68 950 68 1050 68 1150 68 1250 68 1450 70 850 70 950 70 1050 70 1250 72 650 72 850 72 1050 72 1250 72 1450 74 950 75 1050 75 1250 75 1350 76 1050 78 1050 78 1250 80 850 80 1050 80 1250 80 1350 80 1450 85 850 85 1050 85 1250 85 1350 90 1050 90 1350 95 750 100 1050 110 10.550 110 1251 72 1052 60 852 62 752 65 852 65 952 68 752 68 852 68 952 68 1052 68 1352 69 1052 70 1052 72 852 72 1052 72 1252 75 1052 75 1252 76 1352 76.2 1052 78 1352 80 852 80 1052 80 1352 85 852 85 1053 65 1053 68 1053 68 1353 79 1053 80 1054 68 10.554 70 1054 72 554 72 8

40

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

54 72 1054 72.5 954 74 854 75 1254 76 1254 76 12.554 78 1254 80 854 82 1154 85 1554 90 1355 65 855 65.7 7.155 68 855 68.5 7.555 70 755 70 855 70 955 70 1055 72 755 72 855 72 1055 72 1255 72 1355 72.5 955 75 855 75 1055 75 1255 78 855 78 955 78 1055 78 1255 80 555 80 655 80 855 80 1055 80 1255 80 1355 85 855 85 1055 85 1255 85 1355 85 1655 88 1055 90 855 90 1055 90 1255 90 1355 100 1055 100 1255 100 1355 100 1656 69 1056 70 856 72 856 72 956 72 1056 76 1156 80 856 85 856 85 1356 88 1056 88 1356 90 1056 100 1057 67.5 657 72 1057 75 1057 75 1257 76 12.5

57 78 1257 80 1257 80 1357 82.7 1057 85 1057 85 1357 87 1557 90 1357 95 1058 70 658 72 758 72 858 72 958 75 558 75 958 75 1058 75 1158 75 1258 76 758 76 958 78 1358 80 558 80 858 80 1058 80 1258 80 1358 85 1058 85 1258 85 1358 86 1458 90 1058 90 1158 90 1359 80 1059 85 860 70 760 72 860 72 8.560 74 1060 75 760 75 860 75 960 75 1060 75 1260 76 1060 78 760 78 960 78 1060 78 1360 80 760 80 860 80 960 80 1060 80 1260 80 1360 82 960 82 1260 85 860 85 1060 85 1260 85 1360 89 1160 90 860 90 1060 90 1360 92 1160 93 1360 95 860 95 1060 100 10

60 100 1360 110 1260 110 1360 120 1260 130 1560.5 78 961 80 1361 82.5 1362 80 1062 80 1262 82 1062 85 862 85 9.562 85 1062 85 1262 85 1362 90 1062 90 1162 90 1362 95 1062 100 1062 100 1262 111 7.563 80 863 85 1063 85 1263 85 1363 88 1063 90 1063 100 1363 110 1263 110 1364 80 764 80 864 85 1064 85 1264 85 1365 80 865 80 1065 80 1263.5 90 1365 80 1365 82 1065 82 1265 85 865 85 965 85 1065 85 1265 85 1365 86 9.5265 88 1265 90 1065 90 1265 90 1365 92 1265 92 1365 95 1065 95 1365 95 1665 100 865 100 1065 100 1265 100 1365 110 1065 110 1365 115 1565 120 1065 120 1265 125 1266 86 9.52

41

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

66 90 1066 100 1167 80 6.768 79.3 768 82 1068 85 868 85 1068 85 1368 90 1068 90 1268 90 1368 95 1068 95 1268 95 1368 100 1068 100 1369 90 1070 80 670 81.5 6.570 83 570 85 670 85 770 85 870 85 1070 86 8.570 90 770 90 1070 90 1270 90 1370 92 1270 92 1370 92 1470 95 1070 95 1270 95 1370 96 1370 100 670 100 870 100 1070 100 1270 100 1370 100 1670 105 1370 110 870 110 1070 110 1270 110 1370 110 1570 111 1370 112 1270 115 1570 120 1270 120 1370 125 1270 135 1270 150 1271 83 1271 88 872 85 872 85 1072 90 872 90 1072 95 1072 95 1272 95 1372 100 1072 100 1372 110 1273 95 1073.5 110 10

74 88 1074 101.4 1274 105 1274 135 1575 90 875 90 1075 90 1275 91.5 675 92 775 95 875 95 1075 95 1275 95 1375 95.5 1175 100 775 100 1075 100 1275 100 1375 101 1275 102 1275 105 1275 105 1375 105 1575 110 1075 110 1275 110 1375 112 1275 115 9.5275 115 1075 115 1275 115 1675 120 875 120 1275 125 1275 130 1275 130 1375 135 1376 102 1276 105 1376 120 1277 95 1077 100 1078 90 878 95 1178 100 1078 100 1378 105 1378 105 1578 110 1278 110 1378 150.5 1380 95 880 95 1080 100 1080 100 1280 100 1380 100 1480 105 1080 105 1280 105 1380 110 1080 110 1280 110 1380 110 1480 113 1280 115 1080 115 1280 120 1280 120 1380 125 12

80 125 1380 130 1380 140 1380 145 1380 150.5 1382 100 882 105 1282 105 1482 110 1283 110 1385 100 785 100 985 100 1085 100 1285 105 885 105 1085 105 1285 105 1385 110 1085 110 1285 110 1385 110 1585 115 1385 115 1585 120 1085 120 1285 120 1385 125 785 125 1285 126 1385 130 1085 130 1285 130 12.785 140 1285 150 1285 150 1385 155 1286 110 1387 110 1388 100 1388 105 1288 110 1288 110 1388 113 888 115 988 120 1288 120 1388 121.5 1288 126 1288 128 1288 140 1288 140 1388 150.5 1388 150.5 1589.7 105 690 110 890 110 1090 110 1290 110 1390 110 1590 115 890 115 990 115 1090 115 1390 120 1090 120 1290 120 1390 120 1490 120 1590 125 13

42

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

90 125 1490 130 1290 130 1390 135.7 1390 140 1390 155.2 1290 160 1290 167 1491 136 1292 110 1292 120 1292 120 1392 120 1495 110 995 110 1095 110 1295 110 1395 115 895 115 1195 115 1395 120 1295 120 1395 125 1295 125 1395 125 1695 127 1295 130 1295 130 1395 130 1595 132 1295 135 1395 136 1395 145 1395 150 1595 160 1595 170.5 1295 170.5 1395 180.5 1396 112 1096 135.7 1296 136 1297 127 1397 130 1497 167 1398 120 1398 125 1098 125 1398 128 1098 180.5 13100 115 9100 120 10100 120 11100 120 12100 120 13100 125 10100 125 12100 125 13100 125 15100 127 13100 130 10100 130 12100 130 13100 130 14100 135 12100 135 13100 140 12100 140 13100 150 12100 150 13100 150 15

100 160 12100 180 12100 180 13100 185 13102 135 13104 125 10104 130 10104 180.5 105 120 10105 125 10105 125 13105 130 12105 130 13105 130 15105 135 13105 135 14105 140 12105 140 13105 140 16105 145 16105 150 15105 170.5 12107 150 15108 130 12108 130 13108 133.5 13108 145 15110 125 12110 125 13110 130 8110 130 10110 130 12110 130 13110 130 14110 130 14.5110 135 12110 135 13110 140 10110 140 12110 140 13110 140 14110 145 13110 145 14110 145 15110 150 12110 150 13110 150 15110 150.5 14110 155 15110 159 14110 160 8110 160 10110 160 12110 160 15110 200.5 13112 125 9112 140 13114 127 9114 140 13115 130 12115 130 13115 140 10115 140 12115 140 13115 145 13115 145 14115 145 15115 150 12115 150 13115 160 15

115 170.5 13115 180.5 13115 190 15118 140 13118 150 15120 140 10120 140 12120 140 13120 140 14120 145 12120 150 12120 150 13120 150 15120 150.5 13120 160 12120 160 13120 160 14120 160 15120 195 13122 150 15125 140 10125 143 12125 145 7.5125 150 12125 150 13125 150 14125 150 15125 155 12125 160 12125 160 13125 160 15125 180.5 13127 150 13127 170 14128 146 13.5128 150 13128 150 14128 158 13130 140 10130 150 10130 155 10130 160 12130 160 13130 160 14130 160 15130 165 13130 165 15130 170 12130 170 13130 170 14130 170 15130 182 16130 230 14132.5 155.6 13135 155 12135 160 12135 160 13135 160 14135 160 15135 165 12135 165 15135 170 12135 170 15135 170 18135 180 15135 190 14135 190 15135 192 16138 160 15140 160 10

43

Dimensions in mm Dimensions in mm Dimensions in mmd1 d2 L d1 d2 L d1 d2 L

RS Wa

Sizes metric

140 160 13140 160 15140 165 12140 165 15140 170 12140 170 13140 170 14140 170 15140 170 18140 180 12140 180 13140 180 14140 180 15140 190 15140 215 8140 215 12143 175 16144 160 12145 160 10145 165 13145 165 15145 170 15145 175 12145 175 15145 180 12145 180 13145 180 14145 185 15146 163 7148 170 14.5150 162 9150 164 16150 168 12150 168 13150 170 12150 170 13150 170 15150 180 12150 180 13150 180 14150 180 15150 190 15150 200 15155 174 12155 175 12155 180 14155 180 15155 190 15155 200 15156 196 20158 180 15158 190 15160 180 10160 180 12160 180 15160 185 10160 185 15160 190 13160 190 14160 190 15160 195 18160 200 12160 200 14160 200 15161 215 15162 190 12165 190 13165 191 15165 195 13165 200 9

165 200 15169 184 7170 190 13170 190 15170 200 12170 200 14170 200 15170 200 16170 210 14170 220 15175 195 13175 200 10175 200 15175 205 15175 210 14175 220 17175 250 16177 250 16178 208 15180 200 10180 200 13180 200 15180 210 10180 210 15180 215 16180 220 15180 220 16185 210 13185 215 15185 215 16190 220 12190 220 15190 220 16190 225 12190 225 15190 225 16190 230 15192 210 10195 215 15195 230 16195 230 17195 235 15198 230 12200 225 15200 230 13200 230 15200 230 16200 235 16200 235 18200 240 15200 250 15200 310 18205 230 15205 230 16205 250 16210 240 15210 250 15210 250 16210 265 25210 290 20212 245 16215 240 12215 240 15215 250 16220 245 8220 250 12220 250 14220 250 15220 250 16220 255 16

220 255 18220 260 15220 260 16220 260 22225 250 15230 250 15230 255 15230 260 15230 269 22230 270 15230 280 15230 280 16240 270 15240 275 16240 275 18240 280 15240 280 16240 280 19240 335 15250 270 12250 280 15250 280 16250 290 15250 290 16260 290 15260 290 16260 290 20260 300 15260 300 18260 300 20265 290 16265 310 16270 300 15270 310 15270 310