Topic: Theory of Machines
The frictional torque transmitted in a conical pivot bearing considering uniform pressure is: (R: radius of shaft, a: semi angle of cone, $\mu$: Coefficient of friction, W: load on bearing)
- A. $(1/2)\mu WR \csc \alpha$
- B. $(3/4)\mu WR \cos \alpha$
- C. $(2/3)\mu WR \cos \alpha$
- D. $(2/3)\mu WR \csc \alpha$
Answer: D. $(2/3)\mu WR \csc \alpha$
Explanation: According to the uniform pressure theory, the frictional torque transmitted in a conical pivot bearing is given by $T = \frac{2}{3} \mu W R \csc \alpha$.