Question: A 16-tooth pinion drives the double-reduction spur-gear train in the figure. All gears have 25¦ pressure angles. The pinion rotates ccw at 1200 rev/min and

A 16-tooth pinion drives the double-reduction spur-gear train in the figure. All gears have 25—¦ pressure angles. The pinion rotates ccw at 1200 rev/min and transmits power to the gear train. The shaft has not yet been designed, but the free bodies have been generated. The shaft speeds are 1200 rev/min, 240 rev/min, and 80 rev/min. A bearing study is commencing with a 10-kh life and a gearbox bearing ensemble reliability of 0.99. An application factor of 1.2 is appropriate.

Specify the sixbearings.

895 417 1113 2385 657 60 T 3280 1530 3280 1530 393 613 1314 16 80 T 613 1314 20T 874 2274 1075 Developed view 239 (b) Developed view

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