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 205 bearing carries a 1000-lb radial and a 250-lb axial load for one-sixth of the work cycle, and a 500-lb radial for the remainder of the cycle. Speed is uniform at 180 rpm. The inner ring rotates and loads are steady. Find the rating life at 4 hours per day for this bearing.
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