The BJ42D15-26V10 is a versatile, compact bipolar stepper characterized by 1.8° stepping, a 26 V rating suitable for current-regulated drivers, and moderate 1.0 A phase current. It’s a practical choice where dependable, precise open-loop motion is needed—provided you pair it with a proper current-regulated microstepping driver, respect thermal limits, and attend to mechanical integration details.
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The BJ42D15-26V10 is a specific NEMA 17 stepper motor variant commonly found in Creality 3D printers, such as the Ender 3 series. A key "useful feature" for users is its 0.84A rated current, which is critical for correctly setting the stepper driver's voltage reference (VREF) to prevent motor overheating or missed steps. Key Specifications
Step Angle: 1.8° (200 steps per revolution), providing standard precision for 3D printing axes.
Rated Current: 0.84 Amps per phase. Note that online discussions often mistakenly assume 1.5A; using the correct 0.84A limit is essential for longevity.
Holding Torque: Approximately 0.4 N.m (or 2.86 kg.cm), sufficient for driving X, Y, and Z axes on desktop printers.
Dimensions: A "42-34" model, meaning a 42mm x 42mm frame with a 34mm body length. bj42d15 26v10 stepper motor datasheet
Shaft: 5mm diameter, typically with a D-shape for secure gear mounting. Practical Applications This motor is a standard "workhorse" for the following:
Axis Movement: Frequently used for the X, Y, and Z axes on printers like the Ender 3 Pro and CR-10 series.
Quiet Operation: Designed for low noise, making it suitable for home or office environments.
Replacement: It is widely available as a genuine OEM replacement part for worn-out factory motors.
Are you looking to adjust the VREF for this motor on a specific 3D printer mainboard? Creality Ender 3 Stock Factory Vref · GitHub
BJ42D15-26V10 is a specific model of NEMA 17 stepper motor, widely recognized as a standard component in Creality 3D printers The BJ42D15-26V10 is a versatile, compact bipolar stepper
like the Ender 3 series. While finding a single "official" PDF datasheet can be challenging, technical specifications can be synthesized from manufacturer data and user documentation. Funduinoshop Core Technical Specifications The following parameters are typical for the
You're looking for information on the BJ42D15 26V10 stepper motor. Unfortunately, I don't have direct access to specific datasheets or real-time databases. However, I can guide you on what to expect from a typical stepper motor datasheet and provide some general insights.
A: High resistance limits current naturally. This motor was designed before cheap, efficient chopper drivers existed. It runs directly off a 26V regulated supply without needing a current-limiting driver.
Because this is a low-voltage, low-inductance motor, it must be driven by a Chopper Driver (current-limiting driver). Connecting it directly to a constant DC voltage source equal to its rated voltage (without current limiting) will damage the motor.
Suitable Drivers:
Voltage Settings: While the motor is rated for ~2.6V, chopper drivers typically supply 12V, 24V, or 36V to the driver board. The driver chops the voltage to maintain the set current limit (1.5A). The BJ42D15-26V10 is a specific NEMA 17 stepper
Best Practice: Use a 24V – 28V power supply with a driver that allows explicit "Voltage mode" or "1.0A RMS" current setting.
The BJ42D15 26V10 is a 2-phase hybrid stepper motor with a 42 mm × 42 mm flange (NEMA 17 frame size). The designation suggests:
Typical applications: 3D printers, small CNC machines, medical pumps, office automation.
Prepared for: Engineering Reference
Document Type: Simulated Datasheet Review
Date: April 21, 2026
When purchasing a BJ42D15 26V10 stepper motor, request a Certificate of Conformance (CoC) or ask the supplier to verify via multimeter:
If you measure 1.8 Ohms, you have received a standard 3D printer motor – DO NOT use it with 26V.