2014-11-07 nugentek grease presentation
TRANSCRIPT
07.11.2014
Divinol® greases
Zeller+Gmelin GmbH & Co KGChristian StapperSchlossstraße 20, 73054 Eislingen / FilsTelefon +49 7161 802-514Telefax +49 7161 [email protected]
www.zeller-gmelin.de
07.11.2014
theoretical aspects
Greases for use in roller and slide bearings are non-fluidlubricants made from mineral or synthetic oil andthickeners. Additional solid lubricants and additives areallowed to be used (DIN 51 825).
A solid or semi-fluid lubricant consisting of a thickeningagent in a liquid lubricant. Other ingredients impartingspecial properties may be included. (ASTM)
Greases are lubricating oils which - thanks to thickeners -are not running away. (No official standard)
definitions
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► build up of lubricating film
► reduction of friction
► protection from wear
► sealing off exterior influencesas water, dust or dirt
► corrosion protection
► noise damping
objects of grease lubrication
theoretical aspects
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theoretical aspects
advantages of grease lubrication
adhesive behaviour
sealing abilities
impact or oscillating forces
easy maintenance/construction
lifetime lubrication
+++
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−−
theoretical aspects
disadvantages of grease lubrication
no cooling properties
no cleaning properties
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grease components
theoretical aspects
additives0 – 10 %
thickener5 – 20 %
base oil75 – 95 %
=> Main difference compared to oils is the thickener. It is responsible for the consistency of greases as well for different properties!
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thickener
theoretical aspects
- responsible for structure of greases
- keeps the oil in the „system“
- type and amount determines the consistency and NLGI class
- it influences the properties of a grease to a high amount
- thickeners vary in length and thickness of fibers
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soap thickeners
calcium soap (hydrated): −> 60°C; easy duties; water res istant; no use in bearings
calcium soap (anhydrous): −> 100°C, usable for thermally les s stressed bearings
sodium soap: −> 100°C, no use in presence of humidity or wat er
lithium soap: −> 140°C, multipurpose greases
calcium complex soap: −> 150°C, greases for thermally stress ed bearings
lithium complex soap: −> 160°C; high temperatures; very w ork-stable
calc. sulf. complex soap: −> 180°C; high mechanical stabilt y; water resistant
theoretical aspects
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non-soap thickeners
poly urea: −> 160°C; used with high rotary speeds; high temperatures
clay: −> 160°C; specialties; poor corrosion protection
silica gel: −> 160°C; specialties; poor mechanical stabilty
theoretical aspects
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base oils
paraffinic oils
napthenic oils
native esters
poly-alpha-olefins
synthetic esters
silicone oils
Base oils and viscosity significantly influence the properties of greases concerning ageing, high temperature behaviour, low temperature behaviour, pumpability, compatibility to elastomers !!!
theoretical aspects
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additives
anti oxidants (AO): process of ageing is slowed down or stopped; e.g. amines
friction modifier (FM): decrease of friction; e.g. molybdenum compounds
antiwear (AW): polaric layer to decrease contact of surfaces; e.g.inactive sulphur compunds
extreme pressure (EP): creation of reaction layers; e.g. sulphur / phosphor additives
corrosion inhibitors (CI): creation of protective film on surface; e.g. sulfonates,
yellow metal inhibitors (YMI): creation of protective film on surface; e.g. benzotriazoles
theoretical aspects
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grease production
theoretical aspects
300°
70°
<- base oil
<- acid
<- base
<- water
<- additives
<- base oil
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Divinol® greases
Divinol® Lithogrease G -421 (1)
thickener: lithium complex
base oil: mineral oil / poly-alpha-olefin
additivation: very high
classification: KP 2 P-40
advantages: wide temperature range, high temperature grease, very good anti-wear properties
application: broad range of applications; lubrication of tanks (LEO II), axle grease, truck industry
approvals: Nato Code G-421, Schaeffler, Bundeswehr, Bielomatik, Baier+Köppel, Vogel
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Divinol® greases
Divinol® Fett CaX 2 (1)
thickener: calcium complex
base oil: mineral oil, 100 mm²/S
additivation: average
classification: KP 2 N-30
advantages: high temperatures, stable against wash-out
application: continuous casting, hot rolling mill
approvals: voestalpine Stahl
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Divinol® greases
Divinol® Fett CaX 2 (2)
client: steel works, Kazakhstan
product: slabs
department: continuous casting
application: bearings in transport rolls
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Divinol® greases
Divinol® Lithogrease Synt 2/1 (1)
thickener: lithium complex
base oil: poly-alpha-olefin, 460 mm²/S
additivation: high
classification: KPF 2/1 P-40
advantages: high temperatures, very good anti-wear properties
application: hot and cold rolling mills, special couplings
approvals: none
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Divinol® greases
Divinol® Lithogrease Synt 2/1 (2)
client: steel works, Poland
product: round plain wire
department: hot rolling mill
application: bearings in transport rolls
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Divinol® Multitherm 2 (1)
thickener: calcium sulfonate complex
base oil: mineral oil, 180 mm²/S
additivation: very high
classification: KP 2 N-20
advantages: very high load carrying capacity; extra-ordinary water stable, high temperature applications
application: hot rolling mill, road finishing machines (paver)
approvals: none
Divinol® greases
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Divinol® Multitherm 2 (2)
client: road construction equipment manufacturer, Germany
product: street construction equipment
application: spreading auger bearing
Divinol® greases
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Divinol® greases
Divinol® Lithogrease 2161V (1)
thickener: lithium complex
base oil: mineral oil / poly-alpha-olefin
additivation: very high
classification: KP 2 P-40
advantages: wide temperature range, improved pumpability
application: central lubrication systems in truck industry
approvals: SKF Lubrication Systems
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Divinol® greases
Divinol® Lithogrease 2161V (2)
client: CLS manufacturer, Germany
product: centralized lubrication systems (CLS)
application: trucks and commercial vehicles
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Divinol® greases
Divinol® Fett LC 2 EP (1)
thickener: lithium-calcium
base oil: mineral oil, 500 mm²/S
additivation: high
classification: KPF 2 N-30
advantages: very good antiwear properties, very stable against water wash-out
application: cold pilgering machines (SMS Meer)
approvals: none
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Divinol® greases
Divinol® Fett LC 2 EP (2)
client: steel works, Germany
product: seamless steel tubes
application: bearing lubrication in cold pilgering machines
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Divinol® greases
Divinol® Lithogrease 1 (1)
thickener: lithium complex
base oil: mineral oil, 150 mm²/S
additivation: average
classification: KPF 1 N-30
advantages: high temperatures, improved pumpability
application: push bench (hot forming)
approvals: none
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Divinol® greases
Divinol® Lithogrease 1 (2)
client: steel works, Germany
product: seamless steel tubes
application: transport castors in push benches
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Divinol® greases
Divinol® Mehrzweckfett 2WK (1)
thickener: lithium
base oil: mineral (naphthenic) oil, 35 mm²/S
additivation: low
classification: K 2 K-40
advantages: good low temperature behaviour, compatibility to elastomers
application: lubrication of castors
approvals: none
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Divinol® greases
Divinol® Mehrzweckfett 2WK (2)
client: manufacturer, Germany
product: wheels and castors
application: e.g. shopping carts, hospital beds, …
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Divinol® greases
Divinol® Fett L 3 (1)
thickener: lithium
base oil: mineral oil, 100 mm²/S
additivation: average
classification: KP 3 K-30
advantages: good load carrying capacity
application: wide range of applications
approvals: none
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Divinol® greases
Divinol® Fett L 3 (2)
client: manufacturer, Germany
product: wheels and castors
application: e.g. shopping carts, hospital beds, …
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Divinol® greases
Divinol® Fett LT 1 (1)
thickener: lithium
base oil: white oil, 70 mm²/S
additivation: high
classification: KPF 1 K-20
advantages: colourless, compatibility to elastomers
application: lubrication of slide and hinge systems (furniture industry)
approvals: none
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Divinol® greases
Divinol® Fett LT 1 (2)
client: supplier to furniture industries, Austria
product: slide and hinge systems
application: lubrications of slides
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Divinol® greases
Divinol® Fett 2 Mo
thickener: lithium
base oil: mineral oil, 100 mm²/S
additivation: high
classification: KPF 2 K-30
advantages: very good load carrying capacity, good adhesion
application: wire rope lubrication
approvals: none
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Divinol® greases
Divinol® Fett 2 Mo
client: wire ropes manufacturer, Germany
product: wire ropes for cranes, harbours, ship, etc.
application: lubrication of ropes
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Divinol® greases
Divinol® Lithogrease 000 (1)
thickener: lithium complex
base oil: semi synthetic, 380 mm²/S
additivation: very high
classification: GP 000 N-30
advantages: wide temperature range, high temperature grease, very good anti-wear properties
application: guide and slideways lubrication, gear lubrication
approvals: DMG Gildemeister, Vogel
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Divinol® greases
Divinol® Lithogrease 000 (2)
client: machine tool manufacturer, Germany
product: milling machines
application: guide and slideways
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Divinol® greases
Divinol® Lithogrease 000/150 (1)
thickener: lithium complex
base oil: semi synthetic, 150 mm²/S
additivation: very high
classification: GP 000 N-30
advantages: wide temperature range, high temperature grease, very good anti-wear properties
application: guide and slideways lubrication, gear lubrication
approvals: Hermle
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Divinol® greases
Divinol® Lithogrease 000/150 (2)
client: machine tool manufacturer, Germany
product: milling machines
application: guide and slideways
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Divinol® greases
Divinol® Paste SF (1)
thickener: lithium
base oil: semi synthetic, 120 mm²/S
additivation: very high, high amount of white solid lubricants
classification: n.a.
advantages: very stable against water wash out and emulsions
application: power chucks in machine tools
approvals: Schunk, Hainbuch
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Divinol® greases
Divinol® Paste SF (2)
client: electricity components supplier, Germany
product: connection elements for electricity networks
application: power chucks
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Divinol® greases
Divinol® Synthogrease 1 (1)
thickener: lithium-calcium
base oil: poly-alpha-olefin, 20 mm²/S
additivation: low
classification: K 1 K-60
advantages: lifetime lubrication, extra-ordinary low temperature behaviour, low oil seperation
application: lubrication of actuators
approvals: Magna Auteca
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Divinol® greases
Divinol® Synthogrease 1 (2)
client: 1 tier supplier, Austria
product: exterior rear view mirrors
application: gear lubrication of electronicallyadjustable mirrors blades
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Divinol® greases
Divinol® Synthogrease LF 1 WB (1)
thickener: lithium
base oil: poly-alpha-olefin, 100 mm²/S
additivation: high
classification: KPF 1 K-50
advantages: good antiwear properties, very good low temperature behaviour, compatible to elastomers, low oil separation
application: slider bearings
approvals: Wabco Bremse
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Divinol® greases
Divinol® Synthogrease LF 1 WB (2)
client: truck industry supplier, Germany
product: air disc breaks for busses and trucks
application: lubrication of slider bearing