Ball bearing set SCHMITT TN9 polymer cage C4 for Simson M500 engine

A set of ball bearings with a special SKF TN9 polymer cage crankshaft bearing in C4 quality and all gearbox bearings in CN quality, including all necessary FKM shaft seals. A complete set of bearings for engine overhaul, suitable for Simson mopeds S51, S53, S70, S83, KR51/2, SR50 and SR80 with M500, M700 engines.
Ball bearings with polymer cages are used in racing for high-speed 2-stroke engines. SKF specifies speed resistance up to 20,000rpm here! The advantage: an elastic polymer cage with less friction!
Important! Note the installation direction of the crankshaft bearings: the half-open cage must be installed toward the crankshaft cheeks!
Included in delivery:

2x SKF bearing 6204 C4

1x bearing 6004 CN

1x bearing 16004 CN

1x bearing 6203 CN

1x bearing 6000 CN

1x Oil seal FKM Premium 20x47x7mm

1x oil seal FKM Premium 20x35x7mm

1x oil seal FKM Premium 22x35x7mm

1x Oil Seal FKM Premium 20x30x7mm
The ball bearings in this set have the following characteristics:

Seal: open

Bearing clearance crankshaft: C4

Bearing clearance gearbox: CN

Ring material: rolling bearing steel

Rolling element material: rolling bearing steel

Cage material crankshaft bearing: TN9 polymer cage

Gearbox bearing cage material: sheet steel Difference between FPM, FKM, Viton®: The abbreviations or names mentioned refer to the identical basic material, fluororubber. FKM is the short form for fluoroelastomers according to the American ASTM standard, whereas Viton® is a trademark of DuPont Performance Elastomers. In our range, all fluororubber products are designated with the abbreviation FKM.