A conical pivot supports a load of 20 kN, the cone angle is 120º and the
intensity of normal pressure is not to exceed 0.3 N/mm2. The external diameter is twice the internal
diameter. Find the outer and inner radii of the bearing surface. If the shaft rotates at 200 r.p.m. and
the coefficient of friction is 0.1, find the power absorbed in friction. Assume uniform pressure.
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