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Engineering, 12.07.2019 22:30 toxsicity

Asingle-threaded 25 mm diameter power screw has a pitch of 5 mm. the vertical load on the screw reaches 5 kn. the coefficients of friction are 0.08 for the collar and 0.10 for the threads. the collar frictional diameter is 50 mm. find the overall efficiency and the torque required to raise and lower the load.

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