Product Description:

The CTP21NLF15NAA00 is a hybrid stepper motor manufactured by Kollmorgen within the CT Stepper Motors series. Classified under the Cool Torque Performance designation, it provides incremental motion for indexing tables, small gantries, and print stations where open-loop positioning is acceptable. By rotating its rotor in fixed increments commanded by a drive, the unit translates digital pulse trains into predictable mechanical displacement for industrial automation tasks. Its compact build simplifies integration into conveyor diverters and laboratory instruments.

Bipolar excitation allows the motor to deliver up to 1.41 N-m of holding torque, and each of its two phases draws 1.5 A DC at rated load. The windings present 3.86 Ω of resistance and 16 mH of inductance, so the drive must shape current pulses to avoid excessive di/dt and voltage overshoot. With a 1.8° step angle, the rotor advances 200 full steps per revolution, and cumulative positioning error remains within ±3%. The Class B insulation system tolerates 340 VDC, providing margin when high bus voltages are used. Thermal resistance of 3.57 °C/W describes the temperature rise between the copper and the housing during continuous duty.

The housing conforms to Size 23 geometry and measures 2.115 in over the lamination stack, so it fits NEMA through-hole mounts on compact frames. A round smooth shaft supports axial loads to 50 lbs in either direction and radial loads to 20 lbs at the centerline. Rotor inertia is limited to 0.0035 oz-in-s², and the stack length is one, keeping overall mass at 1.4 lb. Four lead wires provide straightforward series or parallel connection, and no rear attachments are supplied, leaving clearance for couplings. The design follows the high-torque performance characteristic assigned to this series and relies on two motor phases for motion generation.