Hollow Shaft Stepper Motor

Hollow Shaft Stepper Motor

A hollow stepper motor is designed with a central bore running through the rotor assembly. The internal opening allows cables, tubes, fibers, or mechanical shafts to pass through the motor body. Bore diameter and internal clearance vary by model and determine what components can be routed through the center.

This configuration is available in selected NEMA frame sizes depending on the product series. The hollow structure enables direct through-axis routing in equipment where external cable paths are not preferred or installation depth is constrained. Mounting dimensions, pilot diameter, and shaft interface details follow the specifications of the given frame size.

When selecting a hollow shaft stepper motor, confirm bore diameter, frame size, holding torque, operating speed range, and allowable radial and axial loads. Electrical ratings should match the intended driver voltage and phase current. Mechanical compatibility with couplings, fixtures, or rotating assemblies should be verified using the outline drawing for the exact model.

Typical integration areas include through-shaft indexing systems, camera positioning modules, rotary valve assemblies, cable winding mechanisms, and compact automation equipment that require internal routing along the rotational axis.