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AW42HS Series — NEMA 17 Hybrid Stepper Motor
The AW42HS series is Apexwell's NEMA 17 (42mm) hybrid stepper motor line, one of the most widely specified frame sizes in robotics, 3D printing, and desktop automation. Across six body lengths from 20mm to 60mm, holding torque scales from 0.16 N·m to 0.75 N·m, and the series is available in either 4-wire (bipolar) or 6-wire (unipolar/bipolar) configurations to match your driver.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Wiring Options | 4-wire or 6-wire |
| 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 |
|---|---|---|---|---|---|---|---|
| AW42HS20-1004A | 20 mm | 1.0 A | 3.6 Ω | 4.1 mH | 0.16 N·m | 26.0 g·cm² | 0.10 kg |
| AW42HS28-1204A | 28 mm | 1.2 A | 3.0 Ω | 7.5 mH | 0.13 N·m | 28.7 g·cm² | 0.17 kg |
| AW42HS34-1304A | 34 mm | 1.3 A | 2.4 Ω | 2.8 mH | 0.24 N·m | 41.8 g·cm² | 0.22 kg |
| AW42HS40-1704A | 40 mm | 1.7 A | 2.2 Ω | 3.8 mH | 0.40 N·m | 58.5 g·cm² | 0.28 kg |
| AW42HS48-1704A | 48 mm | 1.7 A | 3.1 Ω | 5.0 mH | 0.55 N·m | 79.5 g·cm² | 0.35 kg |
| AW42HS60-1704A | 60 mm | 1.7 A | 2.1 Ω | 6.2 mH | 0.75 N·m | 116.0 g·cm² | 0.48 kg |
Typical Applications
With six body lengths covering a 4.7x torque range, the AW42HS series fits 3D printer axes, small robotic arm joints, camera gimbals, CNC router axes, and general desktop automation where NEMA 17 is the de facto standard frame size and mounting brackets, couplers, and drivers are broadly available off the shelf.
Why Choose the AW42HS Series
NEMA 17 is the most widely supported stepper frame size in the motion-control ecosystem. The AW42HS's 4-wire/6-wire flexibility means it can drop into designs built around either simple bipolar drivers or more flexible unipolar/bipolar driver setups without a different motor SKU. For applications where occasional step loss under load is a concern, see our article on why closed loop stepper motors are replacing traditional steppers— or go straight to our AW42HS closed loop series, which shares this same motor platform with encoder feedback built in.
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.
