Product Description:

The CTM22NLF31NAA00 stepper motor is manufactured by Kollmorgen as part of the CT Stepper Motors series and belongs to the Cool Torque Maximum Series. In automated equipment, it converts timed drive pulses into discrete shaft positions, delivering repeatable motion for duties such as indexing tables, compact pick-and-place axes, and metering pumps. This model is used when high torque density and improved thermal efficiency are needed without moving to a larger frame size, and its lead-wired interface supports straightforward field wiring.

Each phase can be driven at 3.1 A DC, a current level that fits common micro-stepping drives while keeping copper loss within safe limits. Under this excitation, the motor produces 3.32 N·m of holding and low-speed torque, supplying ample stall force for direct-drive linear mechanics. The windings show 1.31 Ω resistance at 40 °C, which helps predict thermal rise during operation. A coil inductance of 4.3 mH affects current rise time and therefore the maximum sustainable step frequency before torque droop. Axial loading capacity reaches 50 lbs (23 kg) in either direction, so the shaft can accept thrust from lead screws without separate thrust bearings.

The native resolution is 1.8° per full step, giving 200 increments per revolution for simple drive calculations. Dynamic response benefits from a rotor inertia of 0.000048 kg·m², allowing rapid acceleration when pulse rates climb. Radial loading at the shaft center is rated at 20 lbs (9 kg), supporting belt tension or small pinion forces in side-load applications. The NEMA through-hole pattern on the Size 23 frame, along with a two-stack lamination, four lead connections, and a smooth round shaft, supports direct mounting and coupler attachment while keeping the rear of the motor clear in tight enclosures.