In the following problems, it is assumed that the bearing has but one row of balls. A working year will be taken as 250 days.
The work cycle for a 304 ball bearing is as follows:
500-lb radial and 125-lb axial at 300 rpm for one-half the cycle
600-lb radial at 500 rpm for one-quarter of the cycle
350-lb radial at 1000 rpm for one-quarter of the cycle
Loads are steady; the outer ring rotates. Find the rating life at 2 hours per day of this bearing.
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