Kollmorgen High-Torque Hybrid Stepper Motors & Drives
The Kollmorgen High-Torque Stepper Motor Series (featured model: P22NRXA-LNN-NS-00 NEMA 23 1.8° Stepper) is Kollmorgen's industry-leading hybrid stepper motor platform, designed for cost-effective, precise open-loop and closed-loop positioning across industrial automation, medical devices, laboratory instrumentation, and 3D printing equipment. Encompassing the flagship **POWERMAX II® (P & M Series)**, **PMX Series**, and **E/CT Series**, these 2-phase 1.8° hybrid steppers incorporate high-flux Neodymium stator magnets and optimized tooth profiles to deliver maximum holding torque per frame size with minimal detent cogging. Covering holding torques from 0.12 Nm up to 28.0 Nm across **NEMA 17, NEMA 23, NEMA 34, and NEMA 42** frame dimensions, Kollmorgen steppers offer dual shaft extensions, rear-mounted incremental encoders, IP65 shaft seals, and thermal overload protection. Matched seamlessly with **Kollmorgen P7000 and P5000 digital microstepping drives**, these motors serve as the direct replacement for legacy **Pacific Scientific (Sigmax / E & H Series)** and **Superior Electric Slo-Syn** stepper motors.
Technical Specifications
| Featured Model | P22NRXA-LNN-NS-00 (NEMA 23, 1.8° Step Angle, 1.76 Nm Holding Torque, Single Shaft, Standard Winding) |
|---|---|
| Brand / Manufacturer | Kollmorgen (Regal Rexnord Motion Control) |
| Product Series | POWERMAX II® (P/M Series), PMX Series, E & CT Series Stepper Motors & P7000 Microstepping Drives |
| NEMA Frame Sizes Covered | NEMA 17 (42mm), NEMA 23 (57mm), NEMA 34 (86mm), NEMA 42 (110mm) Frame Standards |
| Holding Torque Range | 0.12 Nm to 28.0 Nm (17 oz-in to 3,960 oz-in Holding Torque) |
| Step Angle Accuracy | 1.8° Standard Step Angle (±3% Step Accuracy Non-Cumulative); 0.9° High Resolution Options |
| Winding & Current Options | Bipolar Series/Parallel & Unipolar Configurations; Rated Phase Currents from 0.4A to 10.0A RMS |
| Matched Stepper Drives | P7000 Series AC/DC Microstepping Drives (P70530 & P70360 with Anti-Resonance Autotuning) |
Documentation & Resources
Kollmorgen Stepper Motor Frame Size & Torque Selection Matrix
Complete selection matrix for Kollmorgen POWERMAX II, PMX, and E/CT hybrid stepper motors. Review NEMA frame sizes, holding torques, phase current ratings, and standard model codes:
| NEMA Frame Size | Series Line | Holding Torque (Nm) | Rated Phase Current | Kollmorgen Model Code Example | Matched Drive Model |
|---|---|---|---|---|---|
| NEMA 17 (42mm) | PMX Series / CT | 0.12 Nm - 0.52 Nm | 0.4 A - 2.0 A | PMX17H-04000 | P70360 (DC Input) |
| NEMA 23 (57mm) | POWERMAX II P20 | 0.65 Nm - 1.76 Nm | 1.2 A - 4.5 A | P21NRXA-LNN-NS-00 | P70360 / P70530 |
| NEMA 23 (57mm) | POWERMAX II P22 | 1.20 Nm - 2.50 Nm | 2.0 A - 6.0 A | P22NRXA-LNN-NS-00 | P70360 / P70530 |
| NEMA 34 (86mm) | POWERMAX II M30 | 2.80 Nm - 6.50 Nm | 3.0 A - 8.0 A | M31NRXA-LNN-NS-00 | P70530 (AC Input) |
| NEMA 34 (86mm) | E Series High Torque | 4.50 Nm - 11.0 Nm | 4.0 A - 10.0 A | E32NRHT-LNN-NS-00 | P70530 (AC Input) |
| NEMA 42 (110mm) | H / H42 Series | 12.0 Nm - 28.0 Nm | 5.0 A - 10.0 A | H42NRHA-LNN-NS-00 | P70530 (AC Input) |
Legacy Pacific Scientific & Superior Electric Stepper Upgrade Guide
Obsolete Pacific Scientific (Sigmax, E, H series) and Superior Electric Slo-Syn stepper motors can be directly replaced with current Kollmorgen POWERMAX II and PMX series motors:
| Legacy Stepper Model (Obsolete) | Legacy Frame & Rating | Current Kollmorgen Equivalent | Key Advantages & Performance Upgrades |
|---|---|---|---|
| Pacific Scientific E21 / E22 Series | NEMA 23 / 0.8 Nm - 1.5 Nm | Kollmorgen P21NRXA / P22NRXA 100% Direct Replacement | Higher holding torque via Neodymium magnetics, low detent torque, rear encoder option. |
| Pacific Scientific N31 / N32 Series | NEMA 34 / 3.0 Nm - 6.0 Nm | Kollmorgen M31NRXA / M32NRXA 100% Direct Replacement | POWERMAX II thermal efficiency, anti-resonance smoothing with P7000 drives. |
| Superior Electric Slo-Syn M091 / M092 | NEMA 34 / 200 Step 1.8° | Kollmorgen M31NRXA / E31NRHT Direct Mechanical Drop-In | Identical shaft and mounting bolt dimensions, updated IP65 shaft sealing options. |
| Pacific Scientific H42 / H43 Series | NEMA 42 / 12 Nm - 25 Nm | Kollmorgen H42NRHA Series 100% Direct Replacement | Heavy cast housing for high overhung loads, Class H insulation for thermal longevity. |
Expert Technical Sourcing & Stepper System Integration Notes
When retrofitting older Pacific Scientific or Superior Electric Slo-Syn stepper motors on industrial labeling machinery, medical pumps, semiconductor indexers, or automated X-Y gantry tables, switching to Kollmorgen POWERMAX II and PMX steppers paired with P7000 digital microstepping drives delivers immediate motion advantages: up to 25% higher holding torque, elimination of low-speed mid-band resonance, whisper-quiet microstepping, and complete physical mounting interchangeability. Simply supply us with your existing stepper motor nameplate serial number or model code (e.g., P22NRXA-LNN-NS-00, E22NRHT-LNN-NS-00, or M091-FD09), and our technical engineering team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- PMX17H-04000 (NEMA 17 0.35 Nm)
- P21NRXA-LNN-NS-00 (NEMA 23 0.85 Nm)
- P22NRXA-LNN-NS-00 (NEMA 23 1.76 Nm)
- P22NRXB-LNN-NS-00 (NEMA 23 Dual Shaft)
- M31NRXA-LNN-NS-00 (NEMA 34 3.20 Nm)
- M32NRXA-LNN-NS-00 (NEMA 34 6.50 Nm)
- E31NRHT-LNN-NS-00 (NEMA 34 4.50 Nm)
- E32NRHT-LNN-NS-00 (NEMA 34 9.20 Nm)
- H42NRHA-LNN-NS-00 (NEMA 42 14.0 Nm)
- P70360-RND (DC Stepper Drive 2.5A)
- P70530-REC (AC Stepper Drive 5.0A)
- Kollmorgen POWERMAX II Stepper
- Kollmorgen PMX Series NEMA 17
- Kollmorgen High Torque Hybrid Stepper
- Pacific Scientific E22 Stepper Replacement
- Pacific Scientific N31 Stepper Replacement
- Superior Electric Slo-Syn Replacement
- Kollmorgen NEMA 23 IP65 Stepper
- Kollmorgen Stepper with Rear Encoder
- Kollmorgen P7000 Microstepping Drive
