A square threaded screw is used to clamp two boards together. The clamping force on the boards is 1000 lb, determine the torque needed to tighten the score to this compressive force. The double square-threaded screw has a mean diameter of 1.0 in. and a pitch of 0.25 in. The coefficient of static friction is μs=0.15

A square threaded screw is used to clamp two boards together. The clamping force on the boards is 1000 lb, determine the torque needed to tighten the score to this compressive force. The double square-threaded screw has a mean diameter of 1.0 in. and a pitch of 0.25 in. The coefficient of static friction is μs=0.15

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.56P: The square-threaded screw 0f the C-clamp has a mean diameter of 8 mm and a pitch of 1.6 mm. The...

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The square-threaded screw 0f the C-clamp has a mean diameter of 8 mm and a pitch of 1.6 mm. The coefficient of static friction between the threads is 0.2. If the torque C=1.50Nm is used to tighten the clamp, determine (a) the clamping force; and (b) the torque required to loosen the clamp.
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