Stepper Linear Actuator - Captive

CAPTIVE STEPPER MOTOR LINEAR ACTUATORS

In a captive linear actuator design, the lead screw is connected to a spline shaft that passes through a spline bushing to keep it from rotating. The spline bushing prevents the lead screw from rotating but allows enough clearance for the shaft to move axially as the lead screw is driven back and forth with a corresponding clockwise and counterclockwise turn of the motor. The anti-rotation feature is inherent in the design and creates a stand-alone unit that pushes and pulls whatever device it is attached to. 

Captive stepper motor linear actuators from Helix Linear Technologies are available in NEMA sizes 8, 11, 14, 17, 23, and 34 with single and double stack options, configurable with standard freewheeling or anti-backlash nuts. 

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