NEMA 8 Stepper Motor 20BYGH28
The 20BYGH28 is a two-phase bipolar hybrid motor with a 20 × 20 mm flange and 28 mm body length, offering a 1.8° (200 steps/rev) step resolution. It features a 4-lead configuration and a 4 mm round shaft. The motor is designed for 0.2 A per phase, 24 Ω phase resistance (±10 %), 8 mH inductance (±20 %), and delivers 0.16 N·cm (2.2 oz‑in) holding torque. Other specs include insulation resistance ≥ 100 MΩ @ 500 VDC, dielectric strength 500 VAC, shaft radial play ≤ 0.06 mm, shaft axial play ≤ 0.08 mm, Class B insulation, rotor inertia 1.8 g·cm², and 80 °C max temperature rise, operating in environments from –10 °C to +50 °C.
Features
- 1.8° (200 steps/rev) step angle with ±5 % accuracy.
- Bipolar, 2-phase (4-lead) microstepping-compatible wiring.
- Rated current 0.2 A per phase.
- Phase resistance 24 Ω (±10 %).
- Phase inductance 8 mH (±20 %).
- Holding torque 0.16 N·cm.
- 4 mm round shaft with minimal radial and axial play.
- High insulation resistance and dielectric strength.
- Supports continuous operation with ≤ 80 °C rise; ambient –10 °C – +50 °C.
Specifications
| Parameter | Value |
|---|---|
| Model | 20BYGH28 |
| Step Angle | 1.8° (200 steps/rev) |
| Step Accuracy | ±5 % |
| Phases | 2 (bipolar, 4‑wire) |
| Rated Current | 0.2 A/Phase |
| Phase Resistance | 24 Ω (±10 %) |
| Resistance Accuracy | ±10 % |
| Insulation Resistance | ≥ 100 MΩ @ 500 VDC |
| Phase Inductance | 8 mH (±20 %) |
| Inductance Accuracy | ±20 % |
| Holding Torque | 0.16 N·cm |
| Rotor Inertia | 1.8 g·cm² |
| Temperature Rise | ≤ 80 °C |
| Ambient Temperature Range | –10 °C – +50 °C |
| Storage Temperature Range | –10 °C – +70 °C |
| Dielectric Strength | 500 VAC for 1 min |
| Number of Leads | 4 |
| Motor Length | 28 mm |
| Shaft Diameter | 4mm round |
Applications
- Precision micro-robotics and lab automation.
- Compact camera gimbals and actuators.
- Miniature positioning mechanisms and valves.
- Medical devices and instrumentation.
- Educational STEM and hobbyist motion projects.
Package Contents
- 1x NEMA 8 Stepper Motor 20BYGH28.
- Integrated 30cm 4-wires connection cable.
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