Product Description:

The CTM31NLF28KAA00 is a hybrid stepper motor built by Kollmorgen within the CT Stepper Motors series and identified as part of the Cool Torque Maximum Series. This single-stack unit converts discrete pulse trains from a stepper drive into controlled angular motion for pick-and-place heads, indexing tables, and light linear stages. By delivering high torque in a compact NEMA 34 envelope, it supports automation tasks that require accurate positioning without closed-loop feedback. The enhanced series focus on maximum torque and efficiency allows smaller drive sizing while maintaining throughput.

At the electrical level, the motor draws a bipolar current of 2.8 A; drives that can supply this current per phase can reach rated output without thermal stress. Under that excitation, the rotor can hold or accelerate loads with a torque of 4.9 N-m, giving margin for friction and inertia in medium-duty axes. The mechanical envelope conforms to Size 34, so the 85 mm square face fits directly on standard NEMA 34 brackets and gearheads. Windings are isolated for up to 340 VDC, enabling operation with high-bus microstepping amplifiers that improve resolution and smoothness. For installation, the housing provides NEMA through holes, allowing bolts to pass completely through the flange instead of threading into it.

The motor has a straight keyway shaft that transmits torque without slip and aligns pulleys or couplings quickly. The design tolerates axial forces up to 100 lbs in either direction, so lead-screw thrust or belt preload can be applied without additional thrust bearings. Radial capacity is 65 lbs at the shaft center, covering typical side pull from belt drives. Electrical connection is provided through four leads in an open-lead style, which allows direct termination to screw terminals or solder lugs. With a single-stack lamination and no rear add-ons, the motor remains short and easy to integrate into compact assemblies.