Product Description:

The CTP21NLS19NAA00 is a hybrid stepper motor produced by Kollmorgen as part of the CT Stepper Motors series and supplied under the Cool Torque Performance designation. It is intended for open-loop motion stages, labelers, and small conveyors, where pulse commands from a microstep drive are converted into discrete shaft positions for indexing parts or tools without a feedback transducer. Its NEMA-compatible front face, leadwire exits, and round smooth shaft let the motor fit existing brackets and couple directly to timing pulleys or screw jacks used in industrial automation.

The motor has a Size 23 frame that measures 57 mm square, giving it a compact footprint relative to its torque rating. Each electrical cycle advances the rotor through 200 full steps per revolution, and the fixed mechanical increment of 1.8° supports fine positioning with step accuracy within ±3%. A single-stack stator keeps the overall length short while still providing the required detent and holding forces. Six color-coded leads provide phase terminations, and a rated phase current of 1.9 A DC matches drive stages that deliver modest bus power. Internal copper windings have 2.44 Ω of phase resistance and 5.0 mH of inductance, which affect rise time and the high-speed torque curve. The housing mounts through NEMA through holes so the frame can be rigidly fastened to machine plates, and insulation resistance reaches 100 MΩ.

The motor provides a continuous bipolar torque of 1.41 N-m, allowing it to accelerate modest inertial loads without stalling. The round shaft withstands axial forces up to 50 lbs in either direction and radial forces of 20 lbs at the shaft center, which supports use with belt tension or spur gears. An insulation voltage rating of 340 VDC separates the windings from the laminated core. Because the motor has no rear shaft extension, the housing remains short, and its lamination geometry is optimized for higher torque density without additional stack sections.