• 2 phase, NEMA8 frame size
• 40 mm long
• 0.4 A phase current
• 0.027 N.m holding torque
• 4 mm shaft size
• Built with high quality materials.High precision, low motor heating, and low vibration。
The stepper motors in this series are manufactured with high-quality materials, adopting open-loop control for precise positioning, excellent speed and torque performance, low noise, and smooth operation. Featuring high-precision stators and rotors with small air gaps, they deliver high reliability and are suitable for a wide range of industrial motion control applications.
| Model | 20J1840-404 |
| Phase | 2 |
| Step Angle（deg） | 1.8 |
| Holding Torque(N·m) | 0.027 |
| Rated Current（A） | 0.4 |
| Phase Resistance(ohm) | 12 |
| Phase Inductance（mH） | 4 |
| Detent Torque（mN·m） | 2 |
| Rotor inertia（g·cm²） | 4.5 |
| Insulation Class | B |
| Number of Leads | 4 |
| Weight（kg） | 0.16 |
| Length（mm） | 40 |
| Matched Drive | 2DM522-RC/EC2DM415 |
| Frame Size（NEMA） | 8 |
| Shaft Diameter（mm） | 4 |
| Frame Size(mm) | 20 |
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