Bj42d15 26v10 Stepper Motor Datasheet ((full)) – Premium & High-Quality

The BJ42D15 26V10 stepper motor features a compact and rugged design, with a NEMA 17 form factor. The motor has a 42mm diameter and a 15mm length, making it suitable for applications where space is limited. The motor shaft is made of high-strength steel, with a 5mm diameter and a 22mm length.

The is a standard 2-phase hybrid NEMA 17 stepper motor heavily utilized in FDM 3D printers like the Creality Ender 3 series . Manufactured primarily by Keli Motor Group (under the "BJ" part prefix), this specific model is a variant of the ubiquitous 42-34 form-factor motor . It balances precise positional accuracy with low acoustic noise, making it highly effective for driving the X, Y, or Z linear axes.

The BJ42D15-26V10 shares its mechanical footprint and performance curves with standard NEMA 17 industrial stepper motors. Creality Ender 3 Stock Factory Vref - GitHub Gist bj42d15 26v10 stepper motor datasheet

Stepper drivers are the interface between your controller (like a 3D printer mainboard) and the motor. The BJ42D15-26V10 is a low-current motor (1.0A) and is compatible with almost any standard driver. The TMC2209 is a popular choice for its "StealthChop2" technology, which makes the motor much quieter than legacy drivers.

This is a , where each of the two independent windings (Phase A and Phase B) is controlled by the driver to create the rotating magnetic field. In bipolar mode, each winding is bidirectional, allowing for higher torque output. The BJ42D15 26V10 stepper motor features a compact

Use power resistors in series with a higher voltage supply. For 26V operation, drive directly. For 12V operation, you need no resistors (since 26 Ohms limits current to 0.46A on 12V – safe but low torque).

Unlike low-inductance motors, the BJ42D15 26V10 exhibits high inductance (approx. 28mH). This results in a specific torque curve: The is a standard 2-phase hybrid NEMA 17

If you measure 1.8 Ohms, you have received a standard 3D printer motor – DO NOT use it with 26V.

Set your stepper driver's Vref current limit to 1.0A (Or 0.7A RMS if using a TMC silent driver).

The is a "current-limited" motor. If you connect it directly to a 12V battery (without a chopper driver), Ohm's Law dictates: I = V / R = 12V / 2.6Ω = 4.6 Amps . The motor will reach 130°C in under 60 seconds and be destroyed.