An ACME double-threaded power screw has 45 mm major diameter, a pitch of 5 mm and...

An ACME double-threaded power screw has 45 mm major diameter, a pitch of 5 mm and thread angle 2α=29°. A vertical load on the screw reaches a maximum of 8.5 kN. The coefficients of friction are 0.05 for the thread and 0.1 for the collar. The frictional diameter of the collar is 65 mm. a) Find the efficiency of the power screw. b) Is this power screw self-locking? Explain why

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samet mamat answered 6 months ago

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