Product Description:

The CTP20NLF38NAA00 is a hybrid stepper motor manufactured by Kollmorgen and supplied within the CT Stepper Motors series. As a member of the Cool Torque Performance family, it is engineered for indexers, small conveyors, and pick-and-place axes where open-loop positioning is acceptable. The device transforms sequential phase energization into precise incremental motion, providing economical position control for automated machinery cells.

Mechanically, the motor uses a Size 23 / 5.7 cm frame and a short 41.2 mm body, so it fits compact NEMA equipment while its 0.45 kg mass helps limit moving load. The round smooth shaft accepts up to 50 lbs (23 kg) of axial force and 20 lbs (9 kg) of radial force at center, supporting couplings and pulleys without additional bearings. Internally, the laminated short stack and a rotor inertia of 0.000018 kg·m² let the axis accelerate quickly toward the rated bipolar torque of 0.71 N-m. Electrically, each of the four color-coded leads carries 3.8 A DC per phase through 0.58 Ohms of resistance and 1.3 mH of inductance, characteristics that affect current rise time and the voltage needed for high-speed stepping. The insulation system is rated for 340 VDC and requires 100 megohms of resistance, helping protect the coils from electrical breakdown during overvoltage events.

Motion granularity is set by a 1.8° step angle, yielding 200 full steps per revolution, and the manufacturer states positional error within ±3%, a tolerance suitable for open-loop axes in printers, lab tools, and light assembly handlers. Heat generated during rapid indexing passes through the winding to the case with a thermal resistance of 3.99 °C/Watt, allowing continuous duty when the motor is bolted to a panel through the NEMA mounting holes. A clear rear face with no added components simplifies installation in tight spaces behind the motor.