skf - 3 barrier solution

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October 30, 2007 SKF Group S lide 0


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Offer descriptionThe SKF three-barrier solution


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Contaminated environment

Very

Harsh18%

Harsh29%Contaminated

28%

Clean

25%

Bearing environment


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Bearing failure due to contamination


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October 30, 2007 SKF Group S lide 4October 30, 2007 SKF Group S lide 4

SKF three-barrier solutiona cost efficient, heavy duty sealed bundle

+

= the basis of the SKF three-barrier solution


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October 30, 2007 SKF Group S lide 5October 30, 2007 SKF Group S lide 5

SKF three-barrier solution

Labyrinth seal Labyrinth seal

Sealed spherical roller bearing

Grease fillingGrease filling


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SKF three-barrier solution

1 12 23 3


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Value proposition OEM and AM

+

Sleeves for sealed units- full range

Conveyor unitsealed spherical rollerbearing

New and attractive range for

the conveyor industry

Cylindrical and tapered bore

On stock for the main variant

+

New environmentally

friendly grease to beused in SKF or customer

housing. Acts as the third

protection

Slide from Conveyor

NMO 2007


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Value proposition OEM andAM

Conveyor unitsealed spherical roller bearing

When needed SKF

provides

SNL housings

Standard S seal or L

seal for the housing.

Less need for taconite

+ +

Slide from Conveyor

NMO 2007


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Value proposition OEM and AM

Conveyor unitsealed spherical roller bearing

Compact solution and downsizing (OEM)

Simplified design process. Reduced width in solution

- no need for taconite (OEM)

The new offer will:

Reduce maintenance. Reduce cost of handlinggrease (purchase, use, destruction) (AM)

Improve service life. MTBF (AM) by highercleanliness (AM) and by avoiding

contamination at assembly (OEM/AM)

The solution is also:

Environmentally friendly (OEM/AM) and brings ahigher degree of health & safety to the

application (OEM/AM)

Slide from Conveyor

NMO 2007

V l P i i OEM d


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Value Proposition OEM andAM

Prolong the service life of the conveyor

unit.

The SKF sealed spherical roller bearing

will exceed the expected life of the pulley

lagging (coating).

Slide from Conveyor

NMO 2007


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Seal knowledge

The cavity between the two

seals should be filled with

grease to preventcontamination from entering the

bearing

Three barriers

Labyrinth seal as a primary seal Bearing seal as a secondary seal

Grease fill in cavity for harsh conditions

In a normal design with open bearing the samegrease

is used to fill the house and to lubricate the bearing.

This means that as soon as the contaminant (particles,

air, water) passes the outer seal it will start to effect thelubrication of the bearing.

Particles can enter the rolling contact and create

damages. Air will start to detoriate the lubrication ability

of the grease and give shorter life. Water can start to

corrode the surfaces.

All this implies that you need a very good outer seal.A one seal system is also very risky to use since as

soon as you get a damage on the seal it will fail to work.

With a Sealed SRB and the three barrier system you

have the option to use different grease than the bearing

grease to fill the house. It can be a low cost, high

performance, or as SKF recommends, a biodegradable

grease (LGGB2).

The function of the bearing will be as good as it gets

since the bearing grease has been selected and

developed by SKF for the sealed SRB. It is filled in a

clean factory environment with the right amount, the right

proceedure and at the right place inside the bearing.

Slide from Conveyor

NMO 2007


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Sealed SRB

2013-11-18 SKF Slide 12SKF Mining, Mineral Processing & Cement

Sealed SRB increases Mean Time Between Failure - MTBF (longer service life)

Decrease in Maintainance To Repair (MTTR)solutions as split SRB, have limited value

compared to increase in MTBF

MTBF

Reliability

Time

Sealed SRB increases MTBF

Decrease MTTR

has limited valueMTTR

Real Value is to increase MTBF

Slide from Conveyor

NMO 2007

skf - 3 barrier solution

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