Bj42d15 26v10 Stepper Motor Datasheet Verified May 2026

BJ42D15-26V10 is a NEMA 17 stepper motor produced by Shenzhen Keli Motor

5.1 3D Printing (e.g., Voron, Prusa MK4)

• Result: Extruder motor application. At 24V, the motor ran at 52°C after 2 hours of continuous retractions.
• Verdict: Verified as "excellent for direct drive extruders" due to low detent torque and smooth microstepping.

Step 3: Inductance Check (If you have an LCR meter)

• Set to 1kHz series mode.
• Measure across a phase: Expect 14.4mH to 21.6mH.
• Low inductance (<10mH) means the motor will run hot and lose torque at high speeds.

• You need a NEMA 17 that stays cool to the touch.
• Your system supply voltage is 24–26V DC.
• You require accurate torque up to 800 RPM.
• You are building a direct-drive extruder, a pick-and-place light robot, or a lab instrument.

3. Torque & Performance

• Holding Torque: ≥ 0.08 N·m (0.8 kg·cm) @ rated current
• Detent Torque: ~0.01 N·m
• Rotor Inertia: ~5 g·cm²
• Temperature Rise: ≤ 60°C (rated current, 2-phase on)
• Insulation Class: B (130°C)

What’s in a Name? Decoding the Model

Before we get to the verified specs, let's decode the model number. This standard naming convention tells us the physical size of the motor before we even look at a datasheet: bj42d15 26v10 stepper motor datasheet verified

For users configuring stepper drivers (like the A4988 or TMC series) for this motor: Target Current: BJ42D15-26V10 is a NEMA 17 stepper motor produced