| 摘要 |
A cylindrical roller bearing comprises a hub 5, a set of cylindrical rollers and an outer part 6. Each roller 4 has a cylindrical surface 12 in rolling contact with races formed on the hub 5 and outer part 6. Each roller additionally has portions of variable cross section 13 (for instance a biconical portion) cooperating with mating portions of the hub and outer portion for centering purpose. For reducing frictional forces, when an axial thrust causes the outer part to shift with respect to the hub 5, the rollers are formed with end portions 11 of tapering cross section arranged to come into abutment with lateral walls 7. <IMAGE> |
