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.
A 206 bearing is subjected to the following work cycle:
Radial load of 500 lb at 150 rpm for 30% of the time
Radial load of 750 lb at 600 rpm for 10% of the time
Radial load of 250 lb at 300 rpm for 60% of the time
The inner ring rotates; loads are steady. What is the rating life at 8 hours per day of this bearing?
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