and is for applications where external antirotation methods are difficult or impossible to employ. The compact actuators feature engineering thermoplastics in the rotor-drive nut and a stainless-steel Acme leadscrew. Available in resolutions from 0.0015 to 0.04 mm/step, the actuators deliver thrusts up to 4.5 kg. The actuator frame measures 21-mm square. Typical uses include medical equipment, X-Y tables, automation, and valve control.