Self-locking keeps tools like screw jacks from unwinding under load. Acme Screw Thread Profile by Wizard191 CC-BY-SA 3.0 Screw thread profiles can be modified from the standard V profile for ...

Lead screws usually incorporate proprietary screw and nut geometries and materials, and can be configured in zero-backlash arrangements. ACME screws are square-topped and have a specific ...

ACME Screw ACME screws have a very specific thread geometry that directly contacts the nut and provides linear motion through direct sliding friction between nut and lead screw. ACME threads are ...

The table is not all wood, of course; metal bushings and pins are used in the scissor mechanism, and the lift drive is a stout Acme-thread screw and nut. We’re impressed by [Marius]’ joinery ...