The shaft shown in the figure is proposed for the applicatio

The shaft shown in the figure is proposed for the application as a gear reduction unit. The material is AISI 1018 cold-drawn steel. The gears seat against the shoulders, and have hubs with setscrews to lock them in place. The effective centers of the gears for force transmission are shown. The keyseats are cut with standard endmills. The bearings are press-fit against the shoulders. The moments at points A and C are M_A=5,350 lbf*in, M_C=6,750 lbf*in. The torque on the shaft is T=2,819 lbf*in. Determine the minimum fatigure factor of safety for infinite life (which could be less than one). Use only DE-Gerber criterion.

The critical location is at ?

a. the shoulder to the right of C

b. at the shoulder to left of C

c. at the keyway at A

where n = ?

1.00 Gear center 75 1 A All fillets 16 in. Dimensions in inches 1/ Gear center 1.00 75 1.3

Solution

Answer of the following question is as follows .

The critical location at should to the rightof C is 89mm.

At left 56 mm4. The keyway at 23 mm. The value id n is 6