A helical gear has the active face width equal to b pitch p and helix angle α. What should be the minimum value of b in order that contact is maintained across the entire active face of the gear?

A helical gear has the active face width equal to b pitch p and helix

1.	A helical gear has the active face width equal to b pitch p and helix angle α. What should be the minimum value of b in order that contact is maintained across the entire active face of the gear?
A.	p cosα
B.	p secα
C.	p tanα
D.	p cotα
Answer» E.