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0800IET201 122003

reducer is 75 kW at a pinion speed of 1200 rpm. The speed ratio is 3 to 1.
Assume medium shock and 24 hour operation. Material is cast steel for both the
gears and the teeth are 20° full depth in normal plane. Determine the module,
face width, and number of teeth? Also check for the wear.
Module 5

A machinery shaft is to transmit 61.5 kW at a speed of 1150 rpm with mild
shock. The shaft is subjected to a maximum bending moment of 900 Nm and an
axial thrust of 70 KN. The shaft is supported at intervals of 2.5 meters. Find out
the diameter of the shaft?

A thick cylinder of inner radius 100 mm and outer radius 200 mm is subjected to
an internal pressure of 70 MPa and an external pressure of 10 MPa. Determine
the hoop stress at the inner radius and outer radius? Determine also the

maximum shear stress? Choose Poisson’s ratio as 0.3

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