| Pin | Function | Wire Color (Typical) | | :--- | :--- | :--- | | 1 | Coil A (+) | Black | | 2 | Coil A (-) | Green | | 3 | Coil B (+) | Red | | 4 | Coil B (-) | Blue | | 5 | NC (Not Connected) | - | | 6 | NC (Not Connected) | - |

Introduction In the world of precision motion control, the stepper motor remains a cornerstone component. Among the myriad of models available, the BJ42D15 26V10 stands out as a specific, high-torque variant within the NEMA 17 form factor. Whether you are repairing a 3D printer, building a CNC machine, or designing a medical device, locating and understanding the official datasheet for this motor is critical.

| Model | Current | Voltage | Torque | Best For | | :--- | :--- | :--- | :--- | :--- | | | 1.0A | 2.6V | 0.22 N·m | Battery-powered devices, small extruders | | Standard NEMA 17 | 1.5A | 3.0V | 0.40 N·m | General 3D printing (Ender 3) | | High Torque NEMA 17 | 2.0A | 3.6V | 0.55 N·m | CNC, Laser engravers | | BJ42D47 (Long) | 1.8A | 4.0V | 0.48 N·m | Heavy Z-axis lifts |