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. 240 lbf 20 Gear 3, 24 dia. Gear 4, 12 dia.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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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.
Transcribed Image 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.
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