BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Keli Motor Group
. It is widely used as a stock component in Creality 3D printers, such as the Ender 3 and CR-10 series, typically serving as the Y-axis motor Technical Specifications
While this specific model number is an OEM-specific variant, it belongs to the BJ42D15 series. Based on technical documentation for this series, the primary specifications are: Step Angle : 1.8° (200 steps per revolution) Rated Current : 0.84 A per phase Holding Torque : Approximately 2.86 kg·cm (0.28 N·m) Input Voltage : Maximum 24V DC Nominal Phase Voltage Phase Resistance : 5.75 Ω (±10%) Phase Inductance : 9.3 mH (±20%) Physical Dimensions Frame Size : 42 x 42 mm (NEMA 17 standard) Motor Length Shaft Diameter : 5 mm (often "D-shaped" for pulley mounting) : Approximately 215g - 220g Funduinoshop Wiring and Pinout
The motor typically features a 6-pin JST-PH connector, but only 4 pins are active for its 2-phase operation. Creality Ender 3 Stock Factory Vref · GitHub 19 Jan 2025 —
Important Context: "BJ42D15" is almost certainly a generic designation used by Chinese manufacturers (often found on Alibaba, AliExpress, or integrated into CNC/3D printer kits). It typically breaks down as:
Because there is no single global manufacturer (like NEMA or Oriental Motor) for this specific part number, official PDF datasheets don't exist in the traditional sense. However, based on the electrical physics of a 42mm, 15mm length motor, here is the definitive technical guide and equivalent datasheet for this motor.
To get the best performance and keep the motor completely silent/cool:
According to the official BJ42D15 26V10 stepper motor datasheet, here are the non-negotiable electrical limits. Exceeding these values will cause overheating and demagnetization. bj42d15 26v10 stepper motor datasheet
| Parameter | Value | Unit | Notes | | :--- | :--- | :--- | :--- | | Rated Voltage | 2.6 | V DC | Per phase | | Rated Current | 1.0 | A | Per phase (Bipolar) | | Phase Resistance | 2.6 | Ω (Ohms) | At 25°C (R = V/I; 2.6/1.0 = 2.6Ω) | | Phase Inductance | 3.2 – 4.5 | mH | Typical range for this stack size | | Insulation Class | B (130°C) | - | Maximum allowable winding temperature | | Dielectric Strength | 500 | V AC | For 1 minute | | Insulation Resistance | 100 | MΩ (Min) | At 500 V DC |
A: Absolutely. 24V is within 8% tolerance. The current will be 24/26 = 0.92A. You will achieve 92% of rated torque. This is the most common practical setup.
The motor is rated for a maximum insulation class. Like most hybrid steppers, the surface temperature can rise to 80°C to 90°C during continuous operation at rated current. This is normal operation but may require mounting to a metal surface for heat dissipation if used in enclosed spaces.
Given its specific 26V/26 Ohm profile, where does this motor excel?
The BJ42D15-26V10 is a standard NEMA 17 hybrid stepper motor offering a balance of torque (approx. 0.4 N·m) and compact size (38mm body). With a rated current of roughly 1.5A per phase and a step angle of 1.8°, it is an ideal choice for hobbyist projects and light industrial automation tasks where precision and reliability are paramount. When integrating this motor, ensure the driver is set to limit current appropriately to prevent overheating and ensure longevity.
BJ42D15-26V10 is a specific model of NEMA 17 stepper motor, widely recognized as a standard component in Creality 3D printers
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 BJ42D15-26V10 is a NEMA 17 hybrid stepper motor
The BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Keli Motor Group. It is widely used as a stock component in Creality 3D printers, typically for the X, Y, or Z axes. Technical Specifications
The following data is compiled from manufacturer documentation and community-verified measurements for the BJ42D15 series: Step Angle: 1.8° (200 steps per revolution) Rated Current: 0.84 A per phase Phase Resistance: Approximately 5.9 Ω Holding Torque: ~0.4 N·m (approx. 2.86–4.0 kg·cm)
Rated Voltage: Usually 3.3V – 4.8V (calculated based on current and resistance), though it operates on 12V/24V systems via current-limiting drivers Frame Size: NEMA 17 (42 x 42 mm) Body Length: 34 mm Shaft Diameter: 5 mm ("D" shape) Weight: ~215g Key Operational Features Creality Ender 3 Stock Factory Vref · GitHub
The BJ42D15-26V10 is a NEMA 17 stepper motor manufactured by Hunan Keli Motor Co. and is commonly used as a stock component in Creality 3D printers, such as the Ender-3 series. Technical Specifications
Based on manufacturer data for the BJ42D15 series, the primary specifications for the 26V10 variant are as follows: Model: BJ42D15-26V10 Frame Size: NEMA 17 (42 x 42 mm) Motor Length: 34 mm Step Angle: 1.8° (200 steps per revolution) Rated Current: 0.84A per phase Phase Resistance: Approximately 6.0 Ω Holding Torque: 0.4 N.m (2.86 kg.cm) Shaft Diameter: 5 mm Max Input Voltage: 24V - 26V DC Application Details
The BJ42D15-26V10 is a NEMA 17 stepper motor commonly found in Creality 3D printers, such as the Ender 3 series. While specific manufacturer-direct datasheets for the "V10" variant are rare, community data and specifications for very similar "V" models (like the V09 and V50) clarify its core performance characteristics. Core Specifications Model: BJ42D15-26V10 Frame Size: NEMA 17 (42 x 42 mm) Motor Height: 34 mm (standard "42-34" class) Step Angle: 1.8° (200 steps per revolution) Rated Current: ~0.84 A per phase
Note: Users often mistake these for 1.5 A motors; however, manufacturer data for the BJ42D15 series confirms a lower rated current of 0.84 A. Holding Torque: ~0.4 N·m (approx. 2.86 kg·cm) Shaft Diameter: 5 mm Electrical Characteristics 42 : NEMA 17 frame size (42mm x
Operating Voltage: Typically driven by 12V or 24V DC systems.
Resistance: Community measurements for the 34mm motors in this series are approximately 5.9 ohms per phase.
Inductance: Generally around 15–20 mH, typical for 42-34 NEMA 17 motors. Application & Setup Tips
Vref Tuning: For standard A4988 or TMC2208/2225 drivers on Creality boards, a Vref of roughly 0.58V to 0.6V is often recommended to target ~0.8A current safely.
Thermal Limits: These motors are Class B insulated, meaning they can safely handle internal temperatures up to 130∘C130 raised to the composed with power C , though a surface temperature below 60∘C60 raised to the composed with power C is ideal for longevity.
Pinout: Standard 6-pin JST-PH connector on the motor side, typically using 4 wires for a 2-phase bipolar configuration. Creality Ender 3 Stock Factory Vref · GitHub