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AW35HS Series — NEMA 14 Closed Loop Hybrid Stepper Motor
The AW35HS series is Apexwell's NEMA 14 (35mm) closed loop hybrid stepper motor line, pairing the motor with a built-in encoder for use with an external driver. Across five body lengths from 28mm to 50mm, holding torque scales from 0.12 N·m to 0.36 N·m, positioning this frame size between NEMA 11 (AW28HS) and NEMA 16 (AW39HS) for applications needing more torque than a NEMA 11 motor offers without stepping up to a NEMA 16 frame.
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 |
|---|---|---|---|---|---|---|---|
| AW35HS28-0504A | 28 mm | 0.5 A | 19.5 Ω | 17.5 mH | 0.12 N·m | 21.0 g·cm² | 0.12 kg |
| AW35HS30-0804A | 30 mm | 0.8 A | 3.5 Ω | 3.5 mH | 0.12 N·m | 21.6 g·cm² | 0.13 kg |
| AW35HS34-0804A | 34 mm | 0.8 A | 4.3 Ω | 6.2 mH | 0.20 N·m | 38.0 g·cm² | 0.16 kg |
| AW35HS44-1504A | 44 mm | 1.5 A | 2.1 Ω | 2.8 mH | 0.25 N·m | 43.0 g·cm² | 0.18 kg |
| AW35HS50-1704A | 50 mm | 1.7 A | 2.0 Ω | 3.2 mH | 0.36 N·m | 56.0 g·cm² | 0.21 kg |
Closed Loop Feedback
Every AW35HS motor integrates a selectable-resolution encoder (500–2000 PPR) as standard, letting the driver verify actual rotor position in real time rather than assuming the commanded pulses were followed. See our article on why closed loop stepper motors are replacing traditional steppers for the broader trend behind this shift.
Typical Applications
With five body lengths covering a 3x torque range, the AW35HS series fits small robotic joints, 3D printer and desktop CNC axes, camera and lens positioning, and medical device actuators where NEMA 14 offers more torque headroom than NEMA 11 without moving up to a bulkier NEMA 16 frame, and closed loop feedback removes the risk of skipped steps under load.
Why Choose the AW35HS Series
NEMA 14 is a compact, well-supported intermediate stepper frame size for designs that have outgrown NEMA 11 but don't need the bulk of NEMA 16 or NEMA 17. Standardizing on the AW35HS series lets a product line scale torque 3x (0.12–0.36 N·m) on a single mounting footprint. 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.
