Overview
The Pacific Scientific M21NSHS-LNN-NS-02 is a Powermax II series hybrid stepper motor designed for precision motion control and industrial automation. This 2-phase NEMA 23 motor delivers high torque output in a compact footprint, making it ideal for machine tool drives, indexing tables, and automated positioning systems. Built to exacting standards by Pacific Scientific (now Kollmorgen), this motor offers reliable stepping accuracy and robust mechanical construction.
Key Features
- 2-phase hybrid stepper motor with 1.8° step angle (200 steps per revolution)
- NEMA 23 frame size with standardized mounting for drop-in replacement compatibility
- High holding torque delivers precise positioning without additional braking
- Permanent magnet rotor ensures detent holding torque when unpowered
- NEMA Class B insulation rated for reliable continuous operation
- Direct-drive capable shaft supports high mechanical loads
Technical Specifications
The M21NSHS-LNN-NS-02 is engineered for industrial motion control with specifications optimized for production environments:
- Step Angle: 1.8° per step (200 steps/rev)
- Frame Size: NEMA 23
- Motor Type: 2-Phase Hybrid Stepper
- Maximum Speed: Up to 3,000 rpm (synchronous)
- Shaft Diameter: 1/4 inch
- Insulation Class: NEMA Class B
- Angular Accuracy: ±3% of one step
- Thermal Resistance: 4.5°C/Watt (mounted)
- Rotor Inertia: 0.012 kg-m² × 10⁻³
- Mounting: NEMA flange mount
Typical Applications
The M21NSHS-LNN-NS-02 excels in demanding motion control environments where precision and repeatability are critical. Common applications include CNC machine tool drives, automated assembly indexing, material handling positioning, rotary table actuation, and precision laboratory instrumentation. The high holding torque and low step angle error make this motor suitable for open-loop positioning without encoder feedback, reducing system cost and complexity.
Compatibility & Replacements
Compatible With
- Standard stepper motor drivers and motion controllers supporting 2-phase operation
- CNC control systems with pulse-and-direction stepping interfaces
- Industrial PLC and motion control platforms
- NEMA 23 standardized mounting locations
- Flexible coupling shafts for mechanical drive coupling
Replaces / Drop-In Replacement For
- Pacific Scientific Powermax II M series motors with identical NEMA 23 frame (verify pinout and wiring before installation)
- Comparable hybrid stepper motors in NEMA 23 form factor
- Verify compatibility with your system integrator before ordering for critical applications
Works With
- Stepper motor driver modules and microstepping controllers
- Industrial motion control software and firmware
- Standard pulse-and-direction stepping protocols
- Current-limiting stepper drivers
