POWER TRANSMISSION ELEMENTS AND MECHANISMS 179 



THRUST BEARING FRICTION MOMENT DETERMINATIONS 



750 -]- 1500 Chorf for obfoining friction 



momenf Mf for solid sfiaff 

 wifh end face Square wiih Hie 

 I axis and fa/<ing a ifirusf load 



'00 I 1400 p as given by me equafion 



2Pf R 

 3 

 650 + 1300 f= CoefficlenloffricHon 

 R = Radius of shaft 



R 

 P- 

 600 -|- 1200 ^ 



■f 



550 



500 - -- 



450 -- 



§ 400 



350 



c 



01 



o 300 



ISO -- 



100 



250 --500 



200 



50 



For the rapid calculation of frictional resisting moments, a chart such as shown 

 by the illustration on this page for a solid shaft with end face square with the axis 

 may be constructed. In using this chart, it is merely necessary to connect the given 

 values of P and / as found on their respective scales by a straight Line. Where this 

 line, shown dotted in the chart, crosses the diagonal, join this point with the given 

 value of R as found on the scale, and extend to the left-hand scale where will be found 

 the desired friction moment. If the friction moment and the speed of the shaft are 

 known, the power lost in friction can be calculated. 



