Speed reduction in a gear box is achieved using a worm and worm wheel. – McqOptions

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1.	Speed reduction in a gear box is achieved using a worm and worm wheel. The worm wheel has 30 teeth and a pitch diameter of 210 mm. If the pressure angle of the worm is 20^o, what is the axial pitch of the worm?
A.	7 mm
B.	22 mm
C.	14 mm
D.	63 mm
Answer» C. 14 mm

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Speed reduction in a gear box is achieved using a worm and worm wheel. The worm wheel has 30 teeth and a pitch diameter of 210 mm. If the pressure angle of the worm is 20o, what is the axial pitch of the worm?
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