Product Description:

The CTP21NLS12NAA00 is a hybrid stepper motor produced by Kollmorgen within the CT Stepper Motors series. Designed for indexing, positioning, and velocity-controlled axes, the motor converts sequential drive current into discrete mechanical rotation for actuators, small conveyors, and pick-and-place modules. By pairing a permanent-magnet rotor with bifilar windings, it delivers incremental motion that can be commanded directly from pulse-train outputs common on PLC and microcontroller hardware.

The unit uses a Size 23 frame that measures 57.15 mm across and 53.72 mm in overall body length, allowing direct installation on NEMA through-hole mountings. With a 1.8° step angle, the rotor advances in 200 discrete increments per revolution, providing predictable resolution for open-loop positioning. Electrical excitation is delivered through six color-coded leads, and the windings draw a phase current of 1.2 A DC. Copper losses are limited by a phase resistance of 5.89 Ohms, while stored energy during switching is influenced by a phase inductance of 12 mH. For dielectric integrity, the coil system withstands 340 VDC and maintains at least 100 Megohms of insulation resistance.

The motor can deliver up to 1.41 N·m of torque, which suits moderate inertia loads in compact positioning systems. Thrust loads may be applied from either direction up to 50 lbs axially, and radial forces at the shaft center can reach 20 lbs without reducing bearing life. Motion precision remains within ±3% of the commanded step angle, supporting repeatable indexing in fixture, laboratory, or light assembly machinery. A round 6.35 mm shaft extends 20.57 mm from the front face, and its smooth, unkeyed form transfers torque directly. The single-stack rotor keeps the motor compact and helps limit overall length.