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G192018 Pages:3

cast iron pulley at "ಔ' which is at 300 mm from the bearing ‘A’. The pulley is
directly coupled to a 5 kW motor running at 750 rpm. The motor is located left
side of the bearing ‘A’. The cast iron pulley is of 250 mm in diameter and
weighing 100 N and is driving a machine shaft running below it. The belt from
pulley to the machine is inclined 60° to the vertical. Determine the appropriate
diameter of the shaft, assuming moderate shock conditions, the friction factor
between the pulley and the belt as 0.3, factor of safety 4.0.

Prove that compressive stress induced in square key is twice that of shear stress

Design a protected type CI flange coupling for a steel shaft transmitting 28 kW
at 200 rpm. The allowable shear stress in the shaft and key material is 40 MPa.
The maximum torque transmitted is to be 20% greater than the mean torque. The
allowable shear stress in the bolt is 60 MPa and allowable shear stress in CI
flange is 40 MPa

ok ok

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