The shaft shown in the figure is proposed as a preliminary design for the application defined in Prob. 3€“73, p. 138. The effective centers of the gears for force transmission are shown. The dimensions for the bearing surfaces (indicated with cross markings) have been estimated. The shaft rotates at 900 rev/min, and the desired bearing life is 12 kh with a 98 percent reliability. Use an application factor of 1.2.
(a) Obtain a Basic Load Rating for a ball bearing at the right end.
(b) Use an online bearing catalog to find a specific bearing that satisfies the needed Basic Load Rating and the geometry requirements. If necessary, indicate appropriate adjustments to the dimensions of the bearingsurface.

Transcribed Image Text:

Gear center Gear center 15 400 350 300 75 30 40 50 50 42 30 30 30 385 285 325 425 080