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AW57HS Series — NEMA 23 Closed Loop Hybrid Stepper Motor
The AW57HS series is Apexwell's NEMA 23 (57mm) closed loop hybrid stepper motor line, offered across eight body lengths — the widest selection in our closed loop stepper platform. Holding torque scales from 0.55 N·m to 2.5 N·m, covering the full range from light CNC axes to heavier industrial positioning tasks on a single, widely-supported NEMA 23 mounting footprint.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Lead Wires | 4 (bipolar) |
| Insulation Class | Class B (130°C) |
| Temperature Rise | 50K Max |
| Ambient Temperature | -20°C to +50°C |
| Insulation Resistance | ≥100 MΩ (500 VDC) |
| Dielectric Strength | 500 VAC, 1 minute |
| Encoder Resolution | 500 / 512 / 1000 / 1024 / 2000 PPR (selectable) |
Model Comparison
| Model | Body Length | Phase Current | Phase Resistance | Phase Inductance | Holding Torque | Rotor Inertia | Mass |
|---|---|---|---|---|---|---|---|
| AW57HS41-2504A | 41 mm | 2.5 A | 1.1 Ω | 2.4 mH | 0.55 N·m | 174 g·cm² | 0.45 kg |
| AW57HS51-2004A | 51 mm | 2.0 A | 1.3 Ω | 4.0 mH | 0.80 N·m | 257 g·cm² | 0.64 kg |
| AW57HS56-3004A | 56 mm | 3.0 A | 1.1 Ω | 3.5 mH | 1.20 N·m | 300 g·cm² | 0.70 kg |
| AW57HS64-4004A | 64 mm | 4.0 A | 0.6 Ω | 1.7 mH | 1.40 N·m | 390 g·cm² | 0.85 kg |
| AW57HS76-3004A | 76 mm | 3.0 A | 0.5 Ω | 2.4 mH | 1.50 N·m | 514 g·cm² | 1.00 kg |
| AW57HS84-3004A | 84 mm | 3.0 A | 0.57 Ω | 2.8 mH | 1.50 N·m | 578 g·cm² | 1.15 kg |
| AW57HS100-4204A | 100 mm | 4.2 A | 0.75 Ω | 3.4 mH | 2.40 N·m | 758 g·cm² | 1.25 kg |
| AW57HS115-4204A | 115 mm | 4.2 A | 0.8 Ω | 3.8 mH | 2.50 N·m | 856 g·cm² | 1.40 kg |
Closed Loop Feedback
Every AW57HS motor integrates a selectable-resolution encoder (500–2000 PPR) as standard. As covered in our article on why closed loop stepper motors are replacing traditional steppers, NEMA 23 is a frame size where the torque and load variability make closed loop feedback particularly valuable — at 1.5 N·m and above, an undetected stall is far more costly than at smaller frame sizes.
Typical Applications
With eight body lengths covering a 4.5x torque range, the AW57HS series fits CNC routers and mills, industrial X-Y positioning stages, packaging equipment indexing, and robotics joints where NEMA 23 provides the torque headroom that NEMA 17 can't, without moving up to a NEMA 34 frame.
Why Choose the AW57HS Series
Eight body lengths on one NEMA 23 mounting interface give unusually fine control over torque selection — useful when a single equipment platform ships in multiple power configurations. Custom shaft length, connector type, and encoder resolution are available on request.
We can customize the electrical parameters of the motor and geometric dimensions such as the motor output shaft size according to customer requirements. Accessories including pulleys, eccentric gearboxes, planetary gearboxes and encoders can also be added. For more products and detailed specifications, please download the product catalog from the Download Center.
