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 centre distance.

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 centre distance.
A.	125.4mm
B.	132.6mm
C.	118.65mm
D.	145.4mm
Answer» D. 145.4mm

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