Question

The axial force (We) required for engaging a cone clutch is given by

(a) Wn sin α

(b) Wn (sin α + µ cos α )

(c) Wn (sin α + 0.25 µ cos α )

(d) none of the mentioned

I have been asked this question in an interview.

I need to ask this question from Friction Clutches topic in division Friction of Machine Kinematics

Answer 1

The correct answer is (c) Wn (sin α + 0.25 µ cos α )

The explanation: Axial force required for engaging the clutch = Wn (sin α  + 0.25 µ cos α )

where Wn = Normal force acting on the contact surfaces,

α  = Face angle of the cone, and

µ = Coefficient of friction.