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AW57HS Series — NEMA 23 Stepper Motor with Worm Reduction Gearbox
The AW57HS series pairs Apexwell's NEMA 23 (57mm), 1.8° hybrid stepper motor with an NMRV030 worm reduction gearbox, scaling motor holding torque from 0.55 N·m to 2.5 N·m across eight body lengths. With reduction ratios from 7.5:1 to 100:1 and a fixed 15 N·m maximum permissible torque, the right-angle worm gearbox output gives designers a compact 90° direction change plus the load-holding characteristic worm drives are known for at higher ratios, without an external brake.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Lead Wire Configuration | 4-wire (bipolar) or 6-wire (center-tap) |
| 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 |
| Gearbox Type | NMRV030 worm reduction gearbox |
| Reduction Ratio Range | 7.5:1 to 100:1 |
| Output Configuration | Right-angle (90°) output shaft |
Motor 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 |
Wiring
Each AW57HS motor is available in either 4-wire (bipolar) or 6-wire (center-tap) configuration, so it can drop into either a bipolar or unipolar driver setup without a different motor SKU.
NMRV030 Worm Reduction Gearbox Specifications
| Parameter | Value |
|---|---|
| Reduction Ratio | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Gearbox Length (L1) | 95 mm |
| Max Torque Moment | 15 N·m |
| Transmission Efficiency | 60% |
| Weight | 1.2 kg |
Eleven reduction ratios are available (7.5 to 100:1) on a fixed gearbox footprint — max torque moment, length, and weight stay constant across the entire ratio range, so changing ratio doesn't change the mechanical envelope.
Typical Applications
With a right-angle output and reduction ratios up to 100:1, the AW57HS worm-gear series fits gate and door actuators, valve and damper drives, tilt and lift mechanisms, and other applications where a 90° direction change saves space and the load needs to hold position without continuous motor power.
Why Choose the AW57HS Worm Gearmotor
The right-angle output lets the gearbox change direction in the mechanical layout without an additional bevel or belt stage, and worm gearing at higher reduction ratios typically resists being back-driven by the load — useful in lifting, tilting, or holding applications where position needs to stay put if power is lost, though the exact self-locking threshold depends on load and friction conditions and should be verified for safety-critical uses. Eleven reduction ratios on one fixed-envelope gearbox let torque and output speed be tuned without changing the mounting footprint. Custom shaft configurations and encoder feedback 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.
