Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects.

Broad, strong Acme threads make these screw jacks better than ball screw jacks for heavy loads, intermittent positioning applications, and where vibration is present.

Mount these two-piece collars anywhere on an Acme lead screw without removing components.