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AW57HS Series — NEMA 23 Stepper Motor with Integrated Driver
The AW57HS series is Apexwell's NEMA 23 (57mm) open-loop stepper motor line with the driver built into the motor housing — no external driver required. Across eight body lengths from 41mm to 112mm, holding torque scales from 0.55 N·m to 2.5 N·m, giving designers a simple, plug-and-play pulse/direction positioning solution at industrial torque levels without the cost or complexity of closed-loop encoder feedback.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Drive Type | Integrated (motor + driver, open loop) |
| Control Interface | Pulse (PU) / Direction (DR) / Enable (EN) |
| Alarm Output | AM+ / AM- |
| 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 |
Model Comparison
| Model | Body Length | Phase Current | Phase Resistance | Phase Inductance | Holding Torque | Rotor Inertia | Mass |
|---|---|---|---|---|---|---|---|
| AW57HS41-2504A | 41 mm | 2.5 A | 1.10 Ω | 2.4 mH | 0.55 N·m | 174 g·cm² | 0.45 kg |
| AW57HS51-2004A | 51 mm | 2.0 A | 1.30 Ω | 4.0 mH | 0.80 N·m | 257 g·cm² | 0.64 kg |
| AW57HS56-3004A | 56 mm | 3.0 A | 1.10 Ω | 3.5 mH | 1.20 N·m | 300 g·cm² | 0.70 kg |
| AW57HS64-4004A | 64 mm | 4.0 A | 0.60 Ω | 1.7 mH | 1.40 N·m | 390 g·cm² | 0.85 kg |
| AW57HS76-3004A | 76 mm | 3.0 A | 0.50 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 | 112 mm | 4.2 A | 0.80 Ω | 3.8 mH | 2.50 N·m | 856 g·cm² | 1.40 kg |
Control & Wiring
The AW57HS uses a screw-terminal power/control block (DC+, GND, PU+/-, DR+/-, EN+/-, AM+/-) — a standard pulse/direction/enable interface compatible with most stepper motion controllers, plus an alarm output for fault monitoring. Unlike Apexwell's closed-loop integrated stepper line, there is no CAN or RS485 bus option and no encoder feedback; control is pulse/direction only.
Typical Applications
With the driver built in and a standard pulse/direction interface, the AW57HS series fits industrial CNC axes, conveyor and indexing drives, packaging machinery, and general positioning tasks where open-loop control is sufficient and the simplicity and lower cost of an integrated open-loop driver outweigh the benefits of closed-loop feedback.
Why Choose the AW57HS Series
Folding the driver into the motor housing cuts cabinet space and wiring compared with a motor-plus-external-driver setup, and the standard pulse/direction/enable interface drops into most existing motion controllers without new firmware or tuning. For applications that don't need position verification against commanded pulses, this open-loop integrated design offers a simpler and lower-cost alternative to Apexwell's closed-loop integrated stepper line on the same NEMA 23 frame. Custom shaft length and connector configurations 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.
