Rotary actuators produce oscillating power by rotating ... This design features two moving parts: the piston sleeve, which reciprocates and rotates; and the output shaft, which only rotates.

The actuators can be run using a two-axis stepper-motor driver and chopper and/or microstepping drives. The Size 14 delivers up to 50-lb thrust and 18 oz-in. of torque. The rotary part is a 1.8 ...