Question: The figure shown is a geared countershaft with an overhanging pinion at C. Select an angular-contact ball bearing from Table 112 for mounting at O

The figure shown is a geared countershaft with an overhanging pinion at C. Select an angular-contact ball bearing from Table 11–2 for mounting at O and a straight roller bearing for mounting at B. The force on gear A is FA = 600 lbf, and the shaft is to run at a speed of 480 rev/min. Solution of the statics problem gives force of bearings against the shaft at O as RO = −387j + 467k lbf, and at B as RB = 316j − 1615k lbf. Specify the bearings required, using an application factor of 1.4, a desired life of 50 000 h, and a combined reliability goal of 0.90

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