A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22 and normal pressure angle 19 . The normal module is taken as 4mm. Calculate the transverse pressure angle in degrees.

A pair of parallel helical gears consist of 15 teeth pinion meshing wi

1.	A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22 and normal pressure angle 19 . The normal module is taken as 4mm. Calculate the transverse pressure angle in degrees.
A.	17.9
B.	20.4
C.	19.6
D.	18.4
Answer» C. 19.6

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