October 30, 2007 © SKF Group Slide 0

October 30, 2007 © SKF Group Slide 1 Offer description The SKF three-barrier solution

October 30, 2007 © SKF Group Slide 2 Contaminated environment Very Harsh 18% Harsh 29% Contaminated 28% Clean 25% Bearing environment

October 30, 2007 © SKF Group Slide 3 Bearing failure due to contamination

October 30, 2007 © SKF Group Slide 4 SKF three-barrier solution – a cost efficient, heavy duty sealed bundle + = the basis of the SKF three-barrier solution…

October 30, 2007 © SKF Group Slide 5 SKF three-barrier solution Labyrinth seal Sealed spherical roller bearing Grease filling

October 30, 2007 © SKF Group Slide 6 SKF three-barrier solution

October 30, 2007 © SKF Group Slide 7  Value proposition – OEM and AM + Sleeves for sealed units - full range Conveyor unit – sealed spherical roller bearing New and attractive range for the conveyor industry Cylindrical and tapered bore On stock for the main variant + New environmentally friendly grease to be used in SKF or customer housing. Acts as the third protection Slide from Conveyor NMO 2007

October 30, 2007 © SKF Group Slide 8  Value proposition – OEM and AM Conveyor unit – sealed 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

October 30, 2007 © SKF Group Slide 9 Value proposition – OEM and AM Conveyor unit – sealed 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 handling grease (purchase, use, destruction) (AM) Improve service life. MTBF (AM) by higher cleanliness (AM) and by avoiding contamination at assembly (OEM/AM) The solution is also: Environmentally friendly (OEM/AM) and brings a higher degree of “health & safety” to the application (OEM/AM) Slide from Conveyor NMO 2007

October 30, 2007 © SKF Group Slide 10 Value Proposition – OEM and AM 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

October 30, 2007 © SKF Group Slide 11 Seal knowledge The cavity between the two seals should be filled with grease to prevent contamination 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 same grease 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 the lubrication 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

October 30, 2007 © SKF Group Slide 12 Sealed SRB ©SKF Slide 12 SKF 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 value MTTR Real Value is to increase MTBF Slide from Conveyor NMO 2007