Screw lift has two installation forms,screw moving and nut moving.Screw movement means that worm wheel rotation drives screw linear motion, screw does not rotate during operation, the installation must have sufficient space; nut movement means that screw and worm wheel fixed, driven nut make up and down straight-line movement, screw rotates during operation.

Worm gear screw lift installation must have enough space. Generally to say, screw lift must have room due to the lifting of the screw shaft stroke and the required space for screw cover, nut movement type can walk the stroke in a limited space.If the installation room is not so sufficient, nut moving type screw jack is a good choice.