With a Phase Current of 1.0A, the motor windings are expected to rise to approximately 60°C-70°C during continuous operation. The "D" stack size allows for better surface-area-to-volume cooling compared to longer "L" stack motors.
The Definitive BJ42D15-26V10 Stepper Motor Datasheet & Technical Guide bj42d15 26v10 stepper motor datasheet exclusive
It's important to clarify: Rather, this model code is most widely recognized as a Creality-customized OEM model , meaning its specifications are closely tied to the manufacturer's ordering customizations. According to manufacturer Keli Motor Group, this motor corresponds to a custom-wound variant with precise torque curve matching for Creality's specific motion controllers. With a Phase Current of 1
| | Rated Current (Imax) | Length | Phase Resistance | Applications | | --------- | ------------------------ | ---------- | -------------------- | -------------------------------- | | 26V02 | 0.8A | 34 mm | 6Ω | Ender 3 original Z-axis | | 26V09 | 1.5A | 34 mm | 30Ω | Ender 3 Pro X/Y axis, early batch| | 26V10 | 1.5A | 34 mm | 30Ω | Creality Ender 3 S1 Pro Y-axis | | 26V12 | 1.5A | 34 mm | — | Latest Ender 3 V2 variant | | 26V19 | 1.5A | 34 mm | — | CR-10 series Z-axis | | 26V50 | 0.84A | 34 mm | — | Compatible replacement | | 26V77 | 0.8A | 34 mm | — | Elegoo Neptune 4 | According to manufacturer Keli Motor Group, this motor
This compact form factor allows it to replace any standard 34mm or 40mm NEMA 17 motor, provided the current and voltage parameters match.
The BJ42D15 runs drastically cooler than standard high-current steppers. This makes it ideal for enclosed 3D printers or medical devices where thermal dissipation is a challenge.