At 26 Ohms per phase, this is considered a high-resistance stepper . Most modern stepper drivers (like A4988 or TMC2209) operate optimally at 1.5 – 2.0 Ohms. Therefore, the BJ42D15 is not intended for standard "chopper" drivers running on 12V. Instead, it is designed for L/R drive circuits or constant voltage drivers using 26V DC.
Typically driven by 12V or 24V DC systems.
While wire colors can change depending on the harness factory, the most common sequences are: Black (A+) and Green (A-) Phase B (Coil 2): Red (B+) and Blue (B-) Driving the BJ42D15-26V10 bj42d15 26v10 stepper motor datasheet
Budget-friendly, reliable, but can be noisy.
The model number encodes the motor's key specifications, primarily used in Elegoo Neptune 4 series 3D printers for 0.8A motor identification: At 26 Ohms per phase, this is considered
However, I can prepare a based on standard specifications for a NEMA 17 or 42 mm frame hybrid stepper motor with 26V/phase and 10 Ω/phase typical characteristics, as implied by the code.
However, official guidance from Creality for the Ender 3 series advises a Vref of approximately 1.06V for the 26V10 variant, which is nearly triple the calculated value above. This suggests that in many 3D printer applications, the motor is intentionally to increase torque, which correspondingly increases heat generation. Therefore, when installing this motor as a replacement, always verify the optimal Vref from your original printer’s manufacturer to balance torque and thermal performance. Instead, it is designed for L/R drive circuits
In practice, when the motor is driven at its rated current, surface temperature can reach around 60.6°C under normal operation, which is well within the insulation class (typically Class B or higher) of these motors. The acceptable winding temperature under continuous operation is typically up to 80°C, but this can be confirmed by a product’s insulation rating.
The is a widely integrated, high-precision hybrid stepper motor manufactured by Keli Motor Group . It is prominently deployed across Creality 3D printers (such as the Ender and CR series) to control X, Y, and Z-axis movements.
Below is a structured technical paper you could use as a template. If you obtain the real datasheet, you can replace the assumed values.