Bj42d15 26v10 Stepper Motor Datasheet Exclusive

Stepper Motor Datasheet: Unveiling the BJ42D15-26V10

• BJ42: This indicates the frame size. “42” refers to a 42mm x 42mm mounting interface. This places it in the NEMA 17 standard family (1.7 inches). However, note that "BJ" often signifies a specific manufacturer’s series (typically a Chinese high-torque line, often associated with Longrun or similar OEMs).
• D15: This is the critical dimension. “D” usually denotes the body depth or stack length. 15 refers to a 15mm rotor stack height. This is a short stack motor, prioritizing high-speed response over low-speed holding torque.
• 26V10: The most crucial electrical specification. 26V indicates the nominal voltage rating (26 Volts DC). V10 is less common, but in high-end stepper parlance, this often denotes a winding variant—specifically, a 10 Ohm phase resistance or a 10:1 inductance ratio. In verified specs, this corresponds to a 10Ω/phase winding.

Torque Curve (Critical Download)

The exclusive torque curve for the BJ42D15 26V10 at 24VDC (chopper drive) is as follows: 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. Stepper Motor Datasheet: Unveiling the BJ42D15-26V10

Part 7: Conclusion – The Verdict on BJ42D15 26V10

The BJ42D15 26V10 stepper motor is a specialist tool, not a generalist. It sacrifices holding torque for speed, efficiency, and thermal management. Its exclusive 26V/10Ω winding makes it a rare gem for battery-operated devices, high-speed light-load positioning, and low-heat environments. BJ42: This indicates the frame size

Resistance/Inductance: While specific to exact sub-models, similar 0.84 A Keli motors (like the JK42HS34-0844) show a resistance of ~5.75 Ωcap omega and an inductance of ~9.3 mH. Deciphering the Model Name

2. Microstepping Fidelity

Due to the high inductance (12mH) combined with a 26V supply, this motor exhibits exceptionally smooth microstepping down to 1/16th step. The low rotor inertia (12 g·cm²) allows the shaft to accelerate instantly without lag. For a 15mm stack, the resonance band (typically 150-250 RPM) is nearly non-existent.

3. Mechanical Specifications

• Body diameter: ≈42 mm
• Length (face to back): 15–50 mm depending on mounting and winding (model “D15” may indicate 15 mm stack or a particular variant)
• Shaft diameter: 5 mm (typical for NEMA17-class)
• Shaft length: 15–20 mm protrusion (typical)
• Mounting pattern: 4 × M3 or M4 threaded holes on a square bolt pattern (≈31 mm for NEMA17)
• Mass: 150–350 g (estimate)
• Bearings: Ball bearings or sleeve bearings — specify for high-speed use