Assignment:
A power square thread screw has a pitch diameter (dm) of 34mm, the lead of the screw 1 of 4mm, the frictional diameter of the collar (dc) of 40mm. The coefficients of friction are f=0.08 for the threads and fc=0.05 for the collar. The vertical load F per screw is 5 kN. How do I find the torque required to raise the load?
Provide complete and step by step solution for the question, use formulas.