A single row deep-groove ball bearing No. 6403 is used to support the lay shaft of a four speed automobile gear box. It is subjected to the following loads:

The lay shift is connected to the engine shaft and rotates at 1750 nr.p.m If the bearing is expected to be in use for 4000 hours, determine the reliability of bearing.

Mumbai University > Mechanical Engineering > Sem 7 > Machine Design 2

Marks: 10M

Year: Dec 2016

Calculation of revolution for each phase

$n_1 = 0.01 \times N = 17.5\\ n_2 = 0.03 \times N = 52.5\\ n_3 = 0.21 \times N = 367.5 \\ n_4 = 0.75 \times N = 1312.5$

Mean revolution $\sum n = n_1 + n_2 + n_3 + n_4 = 1750 rpm$ …