Rolling-ring mechanical drives are simple, efficient, robust, and can eliminate the need for electronic controls. Bob Eisele, Amacoil Inc., Aston, Pa. Rolling-ring drives are friction drives that ...

[2n2r5] posted up a mechanism that we’d never seen before — a threadless ballscrew that turns rotational into linear motion with no backlash. It works by pressing the edge of three bearings fairly ...

The easiest way to design a linear-motion system is to add components one by one. Then, step-by-step calculations relate input to power dissipated moving a load in a specific amount of time. Linear ...