Product Description:

The CTP21NLS48NAA00 is a hybrid stepper motor manufactured by Kollmorgen for the CT Stepper Motors series. It belongs to the Cool Torque Performance Series, a high-torque variant intended for precise incremental motion in automated pick-and-place equipment, small conveyors, and index tables. By combining compact NEMA 23 dimensions with an optimized magnetic circuit, the unit serves as a direct-drive positioning element in systems that do not require closed-loop feedback. Its hybrid stepper design supports repeatable indexing in machines that use pulse-based motion control.

Under bipolar excitation, the motor develops 1.41 N-m of holding torque while drawing a rated phase current of 4.8 A at 2.0 VDC. The 1.8° mechanical step angle yields 200 discrete full steps per revolution, and intrinsic step accuracy is ±3%, which is sufficient for open-loop positioning. Electrical time constants are set by a phase resistance of 0.41 Ω and a phase inductance of 0.74 mH, allowing rapid current rise. Two phases are brought out through six leads, and this six-wire arrangement permits series or parallel winding hookup depending on the drive. That connection flexibility helps the motor match different drive configurations and speed requirements. A detent torque of 8 oz-in maintains rotor alignment when unenergized. The frame is size 23 (5.7 cm) with NEMA through-hole mounting, and a round smooth shaft is supplied at the front while no rear configuration is provided. Stack length is one, which keeps mass and inertia low for dynamic indexing tasks.

Mechanical loading limits are 50 lbs (23 kg) axially in either direction and 20 lbs (9 kg) of radial force at the shaft center, values that suit moderate belt or coupling tensions. Net mass is only 0.65 kg, and the thermal resistance of 3.57 °C/W describes the rate at which internally generated heat is transferred to ambient air. The low mass supports responsive starts and stops on compact axes. The winding insulation withstands 340 VDC and shows 100 MΩ resistance to ground, allowing operation on insulated stepper drives.