CTP31NLF99KAA11 Kollmorgen
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The Kollmorgen CTP31NLF99KAA11 is part of the CT Stepper Motors series, featuring a frame size of Size 34 and a straight keyway shaft type. This stepper motor supports a bipolar motor torque of up to 4.0 N-m, has four connections with leads, and can handle an axial shaft load of 100 lbs in both directions. It uses NEMA through hole mounting and is rated for 9.9 Amps per phase with an insulation voltage rating of 340 VDC.
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Product Description:
The CTP31NLF99KAA11 is a hybrid stepper motor manufactured by Kollmorgen for the CT Stepper Motors series. It is part of the Cool Torque Performance Series and serves motion axes that require accurate open-loop positioning in machine tools, packaging equipment, and fluid-dispensing stations. Each electrical pulse from the drive advances the rotor by a fixed angle, producing repeatable incremental rotation for controlled indexing without a feedback device. This operating method supports applications that require predictable movement and straightforward position control based on a commanded pulse count.
Its square frame follows the NEMA 34 outline and has a Size 34 / 8.5 cm frame, which provides a 3.4-inch mounting face and matching bolt circle. The phase windings draw up to 9.9 A, so the drive must supply the required current to achieve the stated torque performance. The insulation system withstands 340 VDC, providing margin against switching transients and back EMF during operation. Electrical connections use four color-coded leads, simplifying integration with screw terminals or quick-connect clips. The motor attaches through a standard NEMA through-hole pattern, allowing direct installation on compatible motor plates and gearboxes without a separate mounting adapter.
The motor uses a one-stack rotor, which keeps the housing relatively short while providing 4.0 N·m of torque for the CTP configuration. Its straight shaft with a keyway provides positive mechanical engagement with pulleys, gears, or rigid couplings and helps prevent rotational slippage under load. The bearing system supports an axial thrust of 100 lb (45 kg) in both directions, allowing the shaft to tolerate bidirectional forces from mechanisms such as lead screws. It also accommodates a radial load of 65 lb (29 kg) at the shaft center, supporting belt tension and side loading without auxiliary support bearings in suitable installations. The Cool Torque lamination geometry helps the motor maintain positioning accuracy while handling these mechanical loads. Proper drive-current selection and secure shaft coupling help keep the motor within its electrical and thermal operating limits during repeated indexing cycles.
