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 ...

Three primary types of screws are used for linear-motion actuators: Acme, ball, and roller. The differences are in thread shape and the design and operation of the matching nut. But which type of ...