power screws

Power screws

Power screws convert the input rotation of an applied torque to the output translation of an axial force. They find use in machines such as universal tensile testing machines, machine tools, automotive jacks, vises, aircraft flap extenders, trench braces, linear actuators, adjustable floor posts, micrometers, and C-clamps. The mechanical advantage inherent in the screw is exploited to produce large axial forces in response to small torques. Typical design considerations, discussed in the 

following sections, include kinematics, mechanics, buckling and deflection, and stresses.

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