To avoid self-engagement in cone clutch, its semi-cone angle is always kept

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ESE Mechanical 2019: Official Paper
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  1. smaller than the angle of static friction
  2. equal to the angle of static friciton
  3. greater than the angle of static friction
  4. half of the angle of static friction

Answer (Detailed Solution Below)

Option 3 : greater than the angle of static friction
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ST 1: UPSC ESE (IES) Civil - Building Materials
20 Qs. 40 Marks 24 Mins

Detailed Solution

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Concept:

A cone clutch consists of inner and outer conical surfaces.

  • The outer cone is keyed to the driving shaft, while the inner cone is free to slide axially on the driven shaft due to splines as shown in the figure.
  • They are simple in construction and are easy to disengage. However, the driving and driven shafts must be perfectly coaxial for efficient functioning of the clutch.
  • Cone clutches are friction clutches. 
  • To avoid self-engagement in the cone clutch, its semi-cone angle is always kept greater than the angle of static friction.

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