NTN-Bower Tapered Roller Bearings Provide Superior Fatigue Life and Reliability

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Aug 04,2006

Case Hardened Alloy Steel Cups, cones and rollers of NTN tapered roller bearings are made from case hardened alloy steel to provide superior fatigue life and reliability. Premium steels are available for applications requiring extended life and high reliability. Premium steels, including consumable electrode vacuum melted (CEVM) steel or electroslag remelted (ESR) steel are available for applications requiring extended life and high reliability Crowned Rollers Provide Greater Load Carrying Capability NTN's pioneering efforts in developing crowned rollers for tapered roller bearings have resulted in greater load carrying capability and longer bearing life. Crowned rollers under load distribute stress equally along their full length of contact with the raceways, thereby eliminating stress concentration at the roller ends. This design concept also compensates for minor misalignment between shaft and housing bore and deflection under load thereby reducing stress concentration. Optimized Roller End-Rib Face Geometry Because the cup and cone raceway angles are different, the resultant forces between roller-cup contact and roller-cone contact are not equal. The difference between two resultant forces on each roller produces a seating force between the large end of the roller and the cone large rib. This seating force produces positive roller guidance. NTN tapered roller bearings have a spherical surface precision ground on the large end of the rollers. The large roller end and large rib face contact geometry is optimized to promote lubrication and achieve lower operating temperature.

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NTN-Bower Tapered Roller Bearings Provide Superior Fatigue Life and Reliability

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