Screw jack/lift is a basis jack-up part, accomplish the functions such as lifting, drop, push  and inverting through worm gear drives screw.

Travelling Nut Screw Jacks ,or Rotating Screw Jacks have a fixed length lifting screw that rotates . Loads are attached to a flanged “traveling” nut that translates up and down the length of the rotating screw. This type of jack is ideal for applications that cannot accommodate a screw protection tube or that require a flush mount.

Electric screw jacks can also be called electric screw jacks, which include worm gear jacks and electric motors.