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AW86HS Series — NEMA 34 Stepper Motor with Precision Planetary Gearbox & Brake
The AW86HS series pairs Apexwell's NEMA 34 (86mm), 1.8° hybrid stepper motor with an HPS90 precision planetary gearbox and an integrated holding brake in one assembly, combining ≤15 arcmin backlash with a locked shaft when power is removed. Motor holding torque scales from 2.7 N·m to 11.0 N·m across six body lengths, gearbox output torque reaches up to 100 N·m, making this the highest-torque frame size in Apexwell's precision gearbox & brake platform.
Shared Specifications (all models)
| Parameter | Value |
|---|---|
| Step Angle | 1.8° |
| Step Accuracy | ±5% |
| Lead Wire Configuration | 4-wire (bipolar) or 6-wire (center-tap) |
| Gear Material | Metal |
| Backlash (no load) | ≤15 arcmin |
| Noise | ≤55 dB |
| Brake Type | Spring-applied holding brake |
| 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 |
Motor Model Comparison
| Model | Body Length | Phase Current | Phase Resistance | Phase Inductance | Holding Torque | Rotor Inertia | Mass |
|---|---|---|---|---|---|---|---|
| AW86HSA68-4004A | 68 mm | 4.0 A | 0.63 Ω | 3.2 mH | 2.7 N·m | 1,574 g·cm² | 1.85 kg |
| AW86HSA80-5004A | 80 mm | 5.0 A | 0.38 Ω | 3.5 mH | 4.5 N·m | 2,120 g·cm² | 2.50 kg |
| AW86HSA98-6004A | 98 mm | 6.0 A | 0.50 Ω | 5.0 mH | 5.2 N·m | 3,110 g·cm² | 3.10 kg |
| AW86HSA118-6004A | 118 mm | 6.0 A | 0.60 Ω | 6.8 mH | 8.5 N·m | 3,970 g·cm² | 3.75 kg |
| AW86HSA128-5004A | 128 mm | 5.0 A | 0.60 Ω | 7.0 mH | 9.0 N·m | 4,540 g·cm² | 4.25 kg |
| AW86HSA158-6004A | 158 mm | 6.0 A | 0.73 Ω | 8.0 mH | 11.0 N·m | 5,820 g·cm² | 5.20 kg |
HPS90 Precision Planetary Gearbox Specifications
| Parameter | 1-Stage | 2-Stage |
|---|---|---|
| Reduction Ratio | 4, 5, 7, 10 | 16, 20, 25, 28, 35, 40, 50, 70 |
| Gearbox Length (L1) | 110 mm | 132 mm |
| Rated Output Torque | 39–90 N·m | 70–100 N·m |
| Transmission Efficiency | 95% | 94% |
| Weight | 2.9 kg | 3.7 kg |
Momentary torque moment is rated at two times the rated allowable load across both stages. 12 reduction ratios are available in total (4 to 70:1), with rated output torque reaching 100 N·m at the highest 2-stage ratios.
Brake Specifications
| Parameter | Value |
|---|---|
| Static Friction Torque | 4.0 N·m |
| Rated Voltage | DC 24V ±10% |
| Rated Power | 9.2 W |
| Current | 0.585 A |
| Resistance | 62.3 Ω |
| Pull-in Voltage | 20V Max |
| Dielectric Strength | 500 VAC / 1s, 2mA |
The brake holds the motor shaft via spring force when de-energized and releases when 24VDC is applied, independent of the motor phase windings and the gearbox.
Wiring
Each AW86HS 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. The brake coil is wired and powered separately.
Typical Applications
With ≤15 arcmin backlash, gearbox torque up to 100 N·m, and a holding brake that locks the shaft on power loss, the AW86HS series fits heavy vertical (Z-axis) industrial drives, large robotic joints that must hold position accurately without drifting, precision rotary index tables, and other applications where positioning accuracy, high torque, and fail-safe holding all matter on the same axis.
Why Choose the AW86HS Precision Gearbox & Brake Series
Combining a precision planetary gearbox with an integrated brake in one assembly saves the space and integration work of stacking a separate gearbox and brake unit, while still delivering ≤15 arcmin backlash and a shaft that locks whenever the motor is de-energized, even at this frame's industrial torque levels. Six body lengths and two current options at the most common lengths let designers dial in torque and current draw independently. For applications needing only the gearbox or only the brake, Apexwell's separate precision-gearbox and brake series on the same frame offer lower-cost alternatives. 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.
