For a stub tooth spur gear with 20 teeth, a face width of 55 mm, a module of 5 mm, and a material with an endurance strength of 220 MPa, what is the allowable endurance load?
Which are the following answers?!
A: 23.758.29 N
B: 38.773.54 N
C: 5.244.00 N
D: 47.516.59 N
E:19.386.77 N

A200-mm wide strip 25 mm thick is fed through a rolling mill w/two powered rolls each of radius = 250 mm. the work thickness is to be reduced to 22 mm in one pass at a roll speed of 60 rev/min. the average flow stress of the work material, as it passes through the rolls is 175 mpa. the friction coefficient between rolls and work material is 0.20. 1, determine a)-if friction is sufficient for rolling.b)- if friction is sufficient: c)- calculate roll force i calculate roll torque. d)- calculate roll power.