Pro-Dex (Irvine, CA) offers miniature air motors for medical, robotic, and industrial use with stall torques from 2.8 in-oz to 1200 in-oz and free speeds of 7 RPM to 40,000 RPM. They feature a ¾" diameter barrel to fit into tighter spaces than other motors. Since it is air-driven, it does not require expensive Class 1, Division 1 electrical components.
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