A gear$-$reduction unit uses the countershaft depicted in the figure. The bearings are to be angular$-$contact ball bearings, having a desired life of $44$ kh when used at $250re\frac{v}{m}in.$ Use $1\mathrm{.}2$ for the application factor and a reliability goal for the bearing pair of $0\mathrm{.}920,$ assuming distribution data from manufacturer $2$ in Table $11-6.$ Select the bearings from Table $11-2.$

Problem $11\mathrm{.}036.$a $-$ Determination of resultant bearing reactions

Determine the values of the resultant bearing reactions at points $O$ and $C$ on the shaft.

The resultant bearing reaction at point $O$ on the shaft is $$ Ibf.

The resultant bearing reaction at point $C$ on the shaft is $$ lbf$.$