Most variations of this motor use a standard 6-pin JST-PH terminal embedded on the motor body, utilizing 4 active pins. Pin Number Wire Color (Typical) Motor Phase Phase A (+) Pin 4 Phase A (-) Pin 3 Phase B (+) Pin 6 Phase B (-)
The following data is compiled from manufacturer documentation and community-verified measurements for the BJ42D15 series: 1.8° (200 steps per revolution) Rated Current: 0.84 A per phase Phase Resistance: Approximately 5.9 Ω Holding Torque: ~0.4 N·m (approx. 2.86–4.0 kg·cm)
This document is a simulated technical analysis. Actual values may differ. Always refer to the original manufacturer’s datasheet before design or integration.
The primary electrical, mechanical, and physical parameters extracted from the manufacturer specifications include: Creality Ender 3 Stock Factory Vref - Gist - GitHub bj42d15 26v10 stepper motor datasheet
The is a 2-phase hybrid stepper motor with a 42 mm × 42 mm flange (NEMA 17 frame size). The designation suggests:
The BJ42D15-26V10 balances holding torque with high-RPM efficiency. Because of its relatively low phase inductance (4.0 mH), it maintains its torque curve better at higher stepping frequencies compared to longer, high-inductance NEMA 17 motors.
: Designates the product series for hybrid stepper motors optimized for office automation and 3D printing applications. Most variations of this motor use a standard
Always adjust the potentiometer on your stepper driver to match the motor's 1.5A rating. Exceeding this current will cause overheating and potential motor failure.
: Frequently used for the X, Y, and Z axes on printers like the Ender 3 Pro and CR-10 series .
: BJ42D15 26V10 - This unique identifier can help in finding the specific datasheet. Actual values may differ
Running at 26 V / 10 Ω gives 2.6 A – this is high for a small motor. Likely the driver uses chopping (e.g., 24–30 V supply, current limiting to 1.0–1.5 A). Verify with actual datasheet.
Current(RMS)=Vref×MultiplierRsenseCurrent open paren RMS close paren equals the fraction with numerator cap V sub ref end-sub cross Multiplier and denominator cap R sub sense end-sub end-fraction 5. Applications in 3D Printing (Ender 3)