Product Description:

The CTP21NLF56NAA00 is a stepper motor manufactured by Kollmorgen for the CT Stepper Motors series. As part of the Cool Torque Performance line, it is intended for incremental positioning in pick-and-place heads, small indexing tables, and similar industrial motion axes. The motor converts commanded pulse trains into precise angular motion by energizing two windings in sequence. Its step-by-step operation makes it suitable for systems that need predictable indexing without a complex feedback device. This arrangement is commonly used where repeatable stop positions and straightforward drive control are more important than continuous high-speed rotation.

Each revolution is divided into 200 full steps per revolution, so each increment equals 1.8° for repeatable indexing. The motor uses two phases, and each winding draws up to 5.6 A DC through copper with a phase resistance of 0.31 Ω and an inductance of 1.1 mH. Within that electrical range, the rotor can produce 1.41 N·m of holding torque when pulses stop. A detent torque of 0.06 N·m helps preserve position between steps, and the rotor inertia of 0.0035 oz-in-s² supports quick acceleration. The low phase resistance supports higher current drive operation, while the inductance value affects how quickly winding current rises as step commands change.

The shaft is rated for 50 lbs axial load in either direction and for 20 lbs of radial load at the center. The motor uses a round smooth output shaft in a Size 23 frame and has a mass of 0.64 kg. It has a thermal resistance of 3.57 °C/W, while the winding insulation is rated for 340 VDC and 100 MΩ resistance to ground. Installation uses NEMA through holes with a single lamination stack and four lead connections, and the motor is supplied without rear accessories. The through-hole mounting pattern supports straightforward installation on standard machine plates, and the lead wires simplify connection to compatible stepper drives.