An angular contact bearing of a lathe spindle is subjected to a cyclic radial load
during a manufacturing process in an automated plant. During the cycle, the
bearing experiences a radial load of 95 N for 30 s at 2 500 rpm, 75 N for 45 s at
3 500 rpm, and 115 N at 3 100 rpm for 15 s. Assume a shaft diameter of 15 mm.
Specify an appropriate bearing that will be used for 4 000 hours life with a 98 %
reliability. Give the bearing code as well as the relative ratings and dimensions.
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