Product Description:

The CTP20NLF27NAA00 is a hybrid stepper motor produced by Kollmorgen and supplied as part of the CT Stepper Motors series in the Cool Torque Performance line. In automated pick-and-place stations, indexing tables, and small gantries, this motor converts pulse commands from a drive into discrete angular steps, allowing open-loop position control without an encoder. The unit follows the high-torque performance characteristics of the series and is intended for machines that require compact but consistent shaft output. Because it operates as a stepper motor, motion is produced in fixed increments that suit straightforward positioning tasks and repeatable indexing duty.

It mounts through standard NEMA through holes, fits a frame size 23 housing, and uses a short-stack lamination design to limit overall length while providing a holding torque of 100 oz-in and a bipolar developed torque of 0.71 N·m. A 5 oz-in detent torque maintains position when the phases are de-energized, and the rotor inertia of 0.0026 oz-in-s² supports quick acceleration at the specified 1.8° step angle. Four color-coded leads provide power, and the winding draws 2.7 A/phase from a 3.0 VDC source, giving a phase inductance of 2.5 mH and step accuracy within ±3%. The smooth round shaft accepts couplings directly, and a radial load of 20 lb can be applied at the center. Mounting uses the through holes only because there is no rear mounting configuration.

The motor body measures 1.62 inches in overall length, so it can fit shallow equipment frames while keeping thermal mass limited. The windings present a phase resistance of 1.11 Ω with a tolerance of ±10%, and the thermal path from copper to case is rated at 3.99 °C/W, which helps indicate temperature rise under continuous load. Mechanical limits permit an axial load of 50 lbs in either direction, and the motor uses dual bearings to support that loading. Insulation resistance is 100 MΩ, and the windings withstand 340 VDC high-potential tests, supporting operation near noisy drives and unfiltered supplies.