Harmonic Drive Gearbox X17-34-30A Ratio 1:30 with NEMA 17 Stepper Motor
The X17-34-30A combines a standard NEMA 17 hybrid stepper motor with a 30:1 harmonic‑drive gearbox into a remarkably compact 60 mm‑long assembly. Retaining the familiar 42 × 42 mm flange and 34 mm stack, it delivers 2.2 N·m of continuous torque at just 1.4 A per phase. Unlike typical planetary gearmotors, its flex‑spline design achieves less than 2 arc‑min of backlash, providing ultra‑smooth, near‑perfect positional accuracy. This intrinsic precision eliminates mechanical “dead zones” and ensures repeatable motion under bidirectional loads.
Integrating the gearbox into the motor housing streamlines installation—no additional couplings or adapters are required—saving both space and assembly time. The effective output resolution of 0.06° further enhances trajectory smoothness without demanding extreme microstepping. With insulation class B, a maximum 80 °C temperature rise, and an ambient rating from –20 °C to +50 °C, the X17-34-30A is built for reliability. Its high torsional stiffness and minimal hysteresis make it ideal for robotic joints, precision rotary stages, and optical positioning systems. For any application where compactness, high torque density, and backlash‑free operation are paramount, this harmonic‑drive stepper offers a superior, ready‑to‑install solution.
Features
- Integrated 1:30 harmonic‑drive gearbox for near‑zero backlash (≤ 2 arc‑min).
- Rated current 1.4 A per phase for moderate power draw.
- High continuous output torque of 2.2 N·m.
- Compact total length of 60 mm for space‑constrained designs.
- Bipolar, two‑phase (4‑wire) winding compatible with standard stepper drivers.
- High torsional stiffness and positional accuracy.
- Insulation class B and robust mechanical construction for long service life.
Specifications
| Parameter | Value |
|---|---|
| Model | X17-34-30A |
| Frame | NEMA 17 |
| Step Angle | 0.06° |
| Step Accuracy | ±5 % |
| Phases | 2 (bipolar, 4‑wire) |
| Gear Ratio | 1:30 |
| Rated Current | 1.4 A/Phase |
| Phase Resistance | 1.6 Ω (±10 %) |
| Resistance Accuracy | ±10 % |
| Backlash | ≤ 2 arc‑min |
| Insulation Resistance | ≥ 100 MΩ @ 500 VDC |
| Phase Inductance | 3 mH (±20 %) |
| Inductance Accuracy | ±20 % |
| Holding Torque | 2.2 N·m |
| Detent Torque | ~0.04 N·m |
| Rotor Inertia | ~70 g·cm² |
| Temperature Rise | ≤ 80 °C |
| Ambient Temperature Range | –20 °C – +50 °C |
| Storage Temperature Range | –20 °C – +70 °C |
| Dielectric Strength | 500 VAC for 1 min |
| Protection Level | IP40 |
| Number of Leads | 4 |
| Motor Stack Length | 34 mm |
| Overall Length | 60mm |
Torque vs Speed
The torque–speed curve for the X17‑34‑30A shows that at low speeds (up to about 300 RPM), the motor delivers its full rated torque between 2.2 N·m and 1.8 N·m, thanks to the harmonic‑drive gearbox maintaining near‑constant output. As speed increases from 300 RPM to 500 RPM, torque stabilizes at 1.8 N·m, reflecting the onset of electromagnetic and mechanical limits. Beyond 500 RPM, the torque falls more noticeably, reaching roughly 1.5 N·m at 800 RPM—still retaining over 68 % of its stall torque at high speeds. This profile highlights the X17‑34‑30A’s ability to provide strong, steady torque for precision, low‑speed positioning while maintaining substantial power well into its mid‑speed range for dynamic motion tasks.
Applications
- High‑precision robotic joints and gimbals.
- Compact rotary stages and CNC indexers.
- Optical/medical positioning systems.
- Automation requiring ultra-low backlash.
Package Contents
- 1x NEMA 17 Harmonic Stepper Motor Drive X17-34-30A.
- 1x 50cm 4‑wires connector cable.
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