heavy thrust load only
small angular displacement of shafts
radial load at high speed
combined thrust and radial loads at high speed
shear stress
(shear stress)2
(shear stress)3
(shear stress)4
Disagree
(W/A)
(W/2A)
(2W/A)
(3W/A)
0.5 times
equal to
2 times
double