Question : how i calculate the thread size of lead screw on which i have to lift 1200kg weight?
i want to calculate major dia, minor dia and pitch of lead screw of jack on which i have to lift the 1200kg weight
thread lift

Best answer:

Answer by Catenary
The pitch will depend primarily on the efficiency you want to achieve. A small pitch will give a greater mechanical advantage but will also usurp more of the energy in friction losses.

The geometry of the thread depends on the material of construction. You’ll need to evaluate shear force across the root of the thread to avoid stripping it.