PMX Stepper Motors

Kollmorgen’s PMX Series stepper motors are designed with ease–of–use, versatility and cost-effectiveness in mind. They provide high torque in a small package and are offered in a wide range of standard sizes, constructions, windings and options.

These high-performance, brushless, maintenance-free stepper motors provide very precise, extremely cost-effective motion control, and inherently move in small, very precise, 0.9°, or 1.8° increments (400 or 200 steps/revolution). This stepping action is easily controlled without the need for complicated, expensive feedback devices.

The PMX series adds smaller 08, 11, and 14 frame sizes to 17, 23 and 34 frame sizes traditionally offered by Kollmorgen. For reliability in the field and long service life, they are built with high-quality construction.


Motor Model NEMA Frame, (mm) Number of length options Top-End Holding Torque [oz-in] Top-End Holding Torque [Nm]
PMX08 08 (20.2) 2 4.0 0.028
PMX11 11 (28.0) 3 16.7 0.118
PMX14 14 (35.2) 3 26.4 0.186
PMX17 17 (42.3) 5 107 0.756
PMX23 23 (56.4) 4 378 2.67
PMX34 34 (85.9) 4 1739 12.28


Kollmorgen PMX stepper motors offer:

  • High torque/pound – High-quality performance in an affordable low-cost solution
  • Wide range of standard options including bipolar and unipolar windings, integral connectors, shaft keyways and flats, rear shafts, and IP65 sealing.
  • Options for 1.8 and 0.9-degree step angles (PMX17 and PMX23)
  • Easy to apply worldwide – CE, RoHS, REACH

Many custom options are available for the PMX Series motors. These include:

  • Shaft modifications – special shaft dimensions and special features including flats, splined shafts, helical gears, and acme leadscrews.
  • Winding modifications – special windings to match current, resistance, or inductance requirements.
  • Connectors and leadwire – special leadwire colours and customer-specified connectors.
  • Encoders – factory-mounted incremental or absolute encoders with various line counts.
  • Gearboxes – factory-mounted planetary and spur (offset) gearboxes.

PMX Stepper Selection Guide