Bj42d15 26v10 Stepper Motor Datasheet Exclusive
BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Hunan Keli Motor Co., Ltd. and is most commonly found as original equipment in Creality 3D printers
- Holding Torque: 0.12 N·m (17 oz·in) – Note: This is low due to the D15 short stack.
- Pull-out Torque @ 300 pps: 0.11 N·m
- Pull-out Torque @ 1000 pps: 0.09 N·m
- Pull-out Torque @ 3000 pps: 0.04 N·m
- Pull-out Torque: At 1.0A, the motor generates approximately 0.32 N·m of holding torque. As the pulse frequency increases (RPM), the torque drops linearly.
- Optimal Speed Range: 0 to 800 RPM. Beyond 1000 RPM, the torque drops significantly due to inductance, requiring higher drive voltages (48V+) to maintain performance.
While community members often mistake these for high-current 1.5A motors, official specifications for the BJ42D15 series confirm a lower, more efficient current rating. Specification Step Angle 1.8° (200 steps per revolution) Rated Current 0.84A – 0.9A per phase Maximum Input Voltage Holding Torque 2.86 kg·cm to 4.0 kg·cm (approx. 0.28–0.4 N·m) Form Factor NEMA 17 (42 x 42 mm) Motor Height 34 mm (Standard "42-34" size) Shaft Diameter 5 mm (D-shape or round) Phase Number Internal Wiring and Phase Identification bj42d15 26v10 stepper motor datasheet exclusive
In 3D printing contexts, this motor is favored for its balance of high torque and low noise. When configuring stepper drivers (like the A4988 or TMC series), it is critical to set the Vref (Voltage Reference) based on the 0.84 A rating rather than the 1.5 A "default" often found in generic NEMA 17 guides to prevent overheating or motor damage. BJ42D15-26V10 is a NEMA 17 hybrid stepper motor
Mechanical Dimensions (Typical)
- Front Faceplate: 42mm x 42mm
- Mounting Holes: 4x M3 tapped holes (31mm spacing)
- Shaft Diameter: 5mm (Standard Single Shaft)
- Shaft Length: 20mm to 24mm
- Body Length: 34mm (excluding shaft and flange)
