Part B. The worm shaft shown in part a of the figuretransmits 1.2 hp at 500 rev/min. A static force analysis gave theresults shown in part b of the figure. Bearing A is to be anangular-contact ball bearing mounted to take the 555-lbf thrustload. The bearing at B is to take only the radial load, so astraight roller bearing will be employed. Use an application factorof 1.3, a desired life of 30 kh, and a reliability goal, combined,of 0.90. Specify each bearing.
