They feature low backlash, high torsional stiffness, and high efficiency, characteristics that combine for excellent positioning accuracy. The units come in five sizes with acceleration torques from 50 to 6,000 Nm, in units said to be more compact than other alternatives. Optimized helical teeth provide smooth running.

alpha gear drives, 1249 Humbracht Circle, Bartlett, IL 60103, (888) 534-1222,