| Wire Color (common standard) | Pin | Function | | :--- | :--- | :--- | | Black | 1 | Phase A + | | Green | 2 | Phase A - | | Red | 3 | Phase B + | | Blue | 4 | Phase B - |
Because it has a higher phase resistance (26Ω) compared to low voltage motors (1.5–5Ω), it draws only 1A at 26V. According to Ohm's Law: V = I × R → 26V = 1.0A × 26Ω. bj42d15 26v10 stepper motor datasheet verified
At 1000 RPM, torque drops by 82% from holding torque, which is typical for stepper motors. For best performance, operate between 300–700 RPM. Part 4: Wiring Diagram and Driver Compatibility The BJ42D15 26V10 follows the standard A, A', B, B' bipolar wiring (4-wire configuration). | Wire Color (common standard) | Pin |
| Parameter | Value | Verified Tolerance | Notes | | :--- | :--- | :--- | :--- | | | 1.8° | ±0.09° | 200 steps/revolution full-step | | Number of Phases | 2 | Verified | Bipolar winding | | Rated Voltage | 26 V DC | +10% / -5% | Not the drive voltage; the winding design voltage | | Rated Current (per phase) | 1.0 A | ±5% | RMS current | | Phase Resistance | 26 Ω | ±10% (23.4 – 28.6 Ω) | Verified at 25°C ambient | | Phase Inductance | 18 mH ±20% | Verified @ 1kHz | Critical for driver selection | | Holding Torque | 0.22 Nm (31.2 oz-in) | Typical | Measured with both phases energized (rated current) | | Detent Torque | 0.012 Nm (1.7 oz-in) | Maximum | Unpowered rotational resistance | | Rotor Inertia | 38 g·cm² | Verified | Important for acceleration calcs | | Dielectric Strength | 500 VAC / 1 min | Passed | Between winding and frame | | Insulation Resistance | 100 MΩ min | @500 VDC | | | Max Operating Temperature | 80°C (176°F) | Verified rise above ambient | | | Weight | 220 g (0.48 lbs) | ±5 g | | | Shaft Diameter | 5 mm | Verified | Standard for NEMA 17 | | Shaft Length | 24 mm | Verified | Single flat D-cut | For best performance, operate between 300–700 RPM