Estimate the force required at the end of a 5-in. handle to develop a 200-lb clamping force. (See Figure P10.10.)

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Design of Machine Elements   Assume you have a 30 mm in diameter AISI 1040 steel shaft welded on a rigid surface. Forces appliedto this shaft is given below. What would be length of the shaft considering the conditions as givenbelow;− 40 Nm torque is applied throughout the shaft (torque)− 100 kg load is applied at the end point of the shaft (bending)− 250 kg load is applied to push the shaft in the compression direction (normal force)− Factor of safety should be 2

A single-threaded 25-mm power screw is 25 mm in diameter with a pitch of 5 mm. A vertical load on the screw reaches a maximum of 5 kN. The coefficients of friction are 0.06 for the collar and 0.09 for the threads. The frictional diameter of the collar is 45 mm. Find the overall efficiency, and the torque to “raise” and “lower” the load. If the effort load is 75 N, find the force ratio and movement ratio.

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