Design of Machi...

A roller bearing with bore diameter of 40 mm is subjected to radial force of 25 kN. The coefficient of friction is 0.0012 and the speed of rotation is 1440 rpm. The power lost in friction in W is ________.

Calculate the torque transmitted by the clutch having four shoes, with spring force of 700 N and centrifugal force of 4000 N. Rim diameter is 560 mm and coefficient of friction is 0.3

A 6203 single row deep groove ball bearing has a basic dynamic load rating is 7.34 kN and life of bearing expectancy is 37 million revolution cycles, then equivalent static load will be

A shoe-brake makes an angle of 120° at drum-center and the coefficient of friction between them is 0.25. The equivalent coefficient of friction is ______

A hydrodynamic journal bearing is subjected to a radial load of 50 kN at a rotational speed of 1440 rpm. It has a journal diameter and bearing length of 100 mm both. The radial clearance is 0.12 mm. The Sommerfeld number is 0.013. The viscosity of the lubricating oil will be _____.

A 1500 kg automobile moving on a level road at 108 km/hr is to be stopped in a distance of 100 meter, the wheel of diameter being 80 cm. All frictional energy except for the brake is to be neglected.

A roller bearing with a radial load of 9 kN and axial load of 3 kN rotates at 900 rpm. The bearing has an average life of 6000 hours. The service factor is 1.5 and the inner race rotates. For radial and axial load factors equal to 0.6 and 0.9 respectively, the dynamic capacity of bearing (in kN) is ______

Find the maximum force which can be applied on a helical compression spring of mean coil diameter 150 mm and of 20 mm wire diameter. The permissible shear stress of spring wire is 400 N/mm²