A single square thread power screw is to raise a load of 70kN. The screw has a major diameter of 36mm & a pitch of 6mm. The coefficient of friction of the thread & the collar are 0.13 & 0.1, respectively. If the collar mean diameter is 90mm & the screw turns 60rpm, find: (a) power input of the screw; (b) combined efficiency of the screw & collar.

Q: A single-threaded power screw of square form is to raise a load of 90KN at the rate of 360mm/min.…

A: The given information in the problem are shown in the following attached image:

Q: How much torque must be applied to drive the screw with the applied load in units of newton meters?

A: Here,  is lead angle,  is pitch,  is mean thread diameter.

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Q: A single-threaded power screw with square threads pushes against a load of 3,736 N at a speed of 42…

A: Here,  is lead angle,  is pitch,  is mean thread diameter.

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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.