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In a conical clutch, what is the axial force required for disengaging the clutch (Wd)?

In a conical clutch, what is the axial force required for disengaging the clutch (Wd)? Correct Answer Wn(µcosα – sinα)

The axial force required for disengaging the clutch i.e. Wd = Wn(µcosα – sinα). The axial force for disengagement is only required if the value of tan α is less than µ.

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