Product Description:

The CTM31NLF45KAA00 is a hybrid stepper motor built by Kollmorgen as part of the CT Stepper Motors series. In automated assembly lines, it translates command pulses from indexers or micro-stepping drives into incremental shaft movement, allowing fixture positioning and light-load conveyance without an encoder. The motor belongs to the Cool Torque Maximum series, so its design emphasizes high torque density with improved thermal paths for efficient use in compact equipment.

Mechanically, the rotor is supported for axial forces up to 100 lbs in either direction and for radial side loads of 65 lbs at the shaft center, making it suitable for belt-tension or gear-train applications. The single-stack, size-34 frame houses a straight keyway shaft and mounts through NEMA through holes. Dynamic capacity includes a holding torque of 690 oz-in and a bipolar rated torque of 4.9 N-m when wired in a four-lead configuration. With two phases energized at a drive current of 4.5 A, the copper windings have an inductance of 4.3 mH and a resistance of 0.79 Ω, while each step advances the rotor by 1.8°; 200 full steps complete one revolution. Phase energization is routed through flexible leads, enabling direct connection to the drive.

Electrically, the stator insulation is rated for up to 340 VDC, while normal drive buses deliver 3.6 VDC at the specified current, giving the coil set a thermal load of 2.02 °C/W. The rotor’s detent system provides 30 oz-in of torque to resist back-driving when the coils are idle. A compact body length of 2.54 in keeps overall weight to 4.1 lb and limits inertia to 0.0185 oz-in-s², allowing rapid indexing with minimal overshoot. No accessories are fitted at the rear, which keeps the motor layout simple for installation. Lead wires supply the two phases for connection to a compatible stepper drive.