A conical friction clutch is used to transmit 75 kW at 1500 r.p.m. The semi cone angle is 20° and the coefficient of friction is 0.3. If the mean diameter of the bearing surface is 500 mm and the intensity of normal pressure is not to exceed 0.1 N/mm2, find the dimensions of the conical bearing surface.

A conical friction clutch is used to transmit 75 kW at 1500 r.p.m. Th

1.	A conical friction clutch is used to transmit 75 kW at 1500 r.p.m. The semi cone angle is 20° and the coefficient of friction is 0.3. If the mean diameter of the bearing surface is 500 mm and the intensity of normal pressure is not to exceed 0.1 N/mm2, find the dimensions of the conical bearing surface.
A.	118.07 mm, 131.93 mm
B.	131.93 mm, 118.07 mm
C.	121.72 mm, 128.28 mm
D.	128.28 mm, 121.72 mm
Answer» C. 121.72 mm, 128.28 mm

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