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AW35HS Series — NEMA 14 Stepper Motor with Hollow Shaft
The AW35HS series is Apexwell's NEMA 14 (35mm) hybrid stepper motor line built around a through-bore hollow shaft, letting cables, optical fibers, pneumatic lines, or a pass-through mechanism run directly through the rotor axis instead of routing around the motor. 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 the AW28HS and AW39HS hollow-shaft lines for applications needing more torque than NEMA 11 offers without moving up to a NEMA 16 frame.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Lead Wires | 4 (bipolar) |
| Shaft Type | Through-bore hollow shaft |
| 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 |
|---|---|---|---|---|---|---|---|
| AW35HS28-0504A | 28 mm | 0.50 A | 19.5 Ω | 17.5 mH | 0.12 N·m | 21.0 g·cm² | 0.12 kg |
| AW35HS30-0804A | 30 mm | 0.80 A | 3.5 Ω | 3.5 mH | 0.12 N·m | 21.6 g·cm² | 0.13 kg |
| AW35HS34-0804A | 34 mm | 0.80 A | 4.3 Ω | 6.2 mH | 0.20 N·m | 38.0 g·cm² | 0.16 kg |
| AW35HS44-1504A | 44 mm | 1.50 A | 2.1 Ω | 2.8 mH | 0.25 N·m | 43.0 g·cm² | 0.18 kg |
| AW35HS50-1704A | 50 mm | 1.70 A | 2.0 Ω | 3.2 mH | 0.36 N·m | 56.0 g·cm² | 0.21 kg |
Typical Applications
With a through-bore hollow shaft on a NEMA 14 footprint, the AW35HS series fits rotary stages needing cable or fiber-optic pass-through, camera and lens focus mechanisms, compact pan-tilt joints, and small winding or dispensing equipment where routing cabling around the motor isn't practical and NEMA 11 doesn't have enough torque.
Why Choose the AW35HS Series
A hollow shaft removes the need for a separate cable pass-through mechanism or slip ring — wiring, fiber, or a secondary shaft can run straight through the motor's rotational axis, simplifying the mechanical design around it. Five body lengths on the same NEMA 14 mounting footprint let a product line scale holding torque 3x (0.12–0.36 N·m) without changing the bore diameter or mounting interface. Custom shaft bore diameter and length 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.
