A vertical power screw with double start square threads of 50 mm mean diameter and 11mm pitch is raised against a load of 10 kN by means of a hand wheel, the boss of which is threaded to act as a nut. A thrust collar, taking up the axial load,supports the wheel boss and has a mean diameter of 60mm. The coefficient of friction is 0.18for the screw and 0.16for the collar. If the tangential force applied by each hand to the wheel is 200 N, find suitable diameter of the hand wheel.

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Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.