A gear-reduction unit uses the countershaft depicted in the figure. Find the two bearing reactions.The bearings are to be angular-contact ball bearings, having a desired life of 35 kh when used at 350...

Extracted text: A gear-reduction unit uses the countershaft depicted in the figure. Find the two bearing reactions.The bearings are to be angular-contact ball bearings, having a desired life of 35 kh when used at 350 rev/min. Use 1.2 for the application factor and a reliability goal for the bearing pair of 0.95. 16 14 25° ` 12 240 lbf 20° Gear 3, 24 dia. В 21 Gear 4, 12 dia.