In the following problems, it is assumed that the bearing has but one row of balls. A work...

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.

Use Fig. 1, but the rise is 5 in. vertically for 12 in. horizontally. A 308 bearing is installed at the left end. The shaft rotates 1800 rpm for 60% of the lime and 750 rpm for the remainder of the time. Loads are steady. Make a diagram and show the reaction at each end. Compute the rating life at 8 hours per day of the left bearing.

Figure 1