Product Description:

The CTM31NLF99KAA00 stepper motor is manufactured by Kollmorgen as part of the CT Stepper Motors series. It fits within the Cool Torque Maximum Series, whose design emphasizes high torque and efficiency for mid-frame automation axes. In machine tools, pick-and-place heads, and small gantries, this motor receives pulse commands from the drive and converts them into precise rotary steps for open-loop positioning. Its step-based operation is well suited to indexing tasks that rely on repeatable incremental movement.

The windings are rated for a bipolar current of 9.9 A, allowing momentary acceleration without thermal overstress during normal use. At that current, the motor produces a holding torque of 4.9 N-m, which supports static load retention when the shaft is energized at standstill. A square Size 34 housing with an 8.5 cm frame width uses through holes in the front flange for mounting. The Class B insulation system has a working voltage limit of 340 VDC, so standard 160–320 V bus supplies can be used without overstressing the coil varnish. Four phase conductors marked A+ black, A- orange, B+ red, and B- yellow exit as flying leads, which simplifies direct wiring when a connectorized solution is unnecessary. Electrical termination consists of four leads that can be landed on terminal blocks or spliced to preinstalled cable harnesses.

Mechanical loading is supported by an axial limit of 100 lbs in either push or pull and a centerline radial limit of 65 lbs, so belt tension or thrust loads do not overload the bearings. The output shaft is a straight shaft with a keyway, providing a positive drive interface for pulleys or couplings without set-screw slippage. With a 1-stack lamination length, the rotor remains short enough for compact equipment frames. The motor has no rear option installed, which helps keep the overall depth minimal.