Development of a New Life Equation for Ball and Roller Bearings NSK Limited

Format:

Book

Conference/Event

Author/Creator:

Takemura, Hiromichi, author.

Conference Name:

International Off-Highway & Powerplant Congress & Exposition (2000-09-11 : Milwaukee, Wisconsin, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

The conventional rolling bearing life equation (1), which is based on the theory of Lundberg and Palmgren, has a problem in that it does not match the actual bearing life in all operating conditions. For instance, while the actual life of a bearing under clean lubrication is 20 times longer than the calculated life, actual life under contaminated lubrication is as low as one-tenth of the calculated life.To solve this problem, the following life equation (Eq. 1: Advanced Bearing Life Equation) was developed with the aNSK life modification factor:The new aNSK factor is based on data from bearing life aNSK tests involving over 450 roller bearings and over 550 ball bearings under a variety of operating conditions. The new life equation with the aNSK factor showed a satisfactory fit between calculated life and actual life

Notes:

Vendor supplied data

Publisher Number:

2000-01-2601

Access Restriction:

Restricted for use by site license