A multi-disc clutch has 3-discs on the driving shaft and 2-discs on the driven shaft. Outside radius of the contact surface is 180 mm and inside radius is 120 mm. Assuming uniform wear and coefficient...

A multi-disc clutch has 3-discs on the driving shaft and 2-discs on the driven shaft. Outside radius of the contact surface is 180 mm and inside radius is 120 mm. Assuming uniform wear and coefficient of friction is 0.3. Find the maximum axial intensity of pressure between the discs for transmitting 25 kW at 1,500 rpm.