NEMA 8 Stepper Motor 20BYGH28

Description

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. Datasheet 20BYGH28 NEMA 8 .

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