Product Description:

The CTM21NLF15NAA00 is a hybrid stepper motor produced by Kollmorgen within the CT Stepper Motors series. As part of the Cool Torque Maximum Series, it is intended for indexing, positioning, and feed tasks where open-loop speed and torque repeatability are sufficient for machine control. By converting digital pulse trains from a drive into incremental rotary motion, the motor simplifies positioning in pick-and-place modules, labelers, and compact conveyors found throughout industrial automation.

The motor delivers a holding torque of 260 oz-in, allowing a stationary load to remain in place without active feedback. Each phase draws a rated current of 1.5 A at a rated voltage of 5.9 VDC, values that determine the required drive output and influence copper heating. Internal copper windings present a phase resistance of 3.86 Ω; together with a phase inductance of 12 mH, this establishes the electrical time constant that limits step rate before torque begins to drop. These parameters guide drive operation so that current rises quickly enough to reach commanded torque without exceeding the insulation voltage rating of 340 VDC. Step angle is fixed at 1.8°, and the ±3% step accuracy describes deviation from the commanded position due to magnetic detent forces and manufacturing tolerances.

The rotor and shaft assembly can accept an axial load of 50 lbs in either direction and a radial load of 20 lbs at the shaft center, enabling direct coupling to moderate belts or gears without additional bearings. A low rotor inertia of 0.0035 oz-in-s² supports rapid acceleration for high-cycle start-stop duty, while the standard round smooth shaft maintains concentricity with external couplings. Resolution is fixed at 200 full steps per revolution. The size 23 frame, single-stack construction, four lead connections, and NEMA through-hole mounting style support installation in compact motion stages.