Bj42d15 26v10 Stepper Motor Datasheet May 2026
Many beginners mistake "26V" for the supply voltage. This is a fatal error. 2.6V is the DC resistance voltage drop, not the driving voltage. In practice, you drive this motor with a chopper driver (like an A4988 or TMC2209) at 12V to 24V, while limiting the current to 1.0A.
The BJ42D15-26V10 is a versatile "workhorse" motor found in:
A: Yes. Using Ohm's Law: 12V / 26 Ohms = 0.46A. The motor will run cool and very quietly, but the holding torque will drop to approximately 0.14 N·m (half of rated). It is safe for light loads.
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.
Note on D15 Length: The "D15" designation creates a body length of approximately 40mm. Excluding the rear protrusion, the total motor depth is roughly 48mm. This is shorter than a standard "D20" or "D25" stack, making the BJ42D15 ideal for space-constrained designs where torque requirements are moderate.
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.
The BJ42D15 26V10 is a low-inductance, moderate-torque NEMA 17 stepper suitable for compact systems. Its 26 V / 10 Ω labeling requires careful driver selection – always use a current-controlled chopper driver. Obtain the original datasheet for exact thermal limits and torque-speed curves.
Disclaimer: This document is a simulated technical analysis. Actual values may differ. Always refer to the original manufacturer’s datasheet before design or integration.
BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Hunan Keli Motor Co., Ltd. and is commonly found in Creality 3D printers like the Ender 3 series. Core Specifications
Based on manufacturer data and community measurements for the BJ42D15 series, the primary specifications are as follows: : 2-Phase Hybrid Stepper Step Angle : 1.8° (200 steps per revolution) Rated Current : 0.84A per phase Phase Resistance : Approximately 6.0 Holding Torque : 2.86 kg·cm (0.28 N·m) Frame Size : 42 x 42 x 34 mm (NEMA 17) Shaft Diameter Operating Voltage
: Typically used with 12V or 24V systems; maximum recommended input is 24V DC Technical Overview for 3D Printing In the context of Creality machines
, this motor is frequently used for the X, Y, or Z axes. A common misconception is that these motors are rated for 1.5A; however, official communications from Keli Motor indicate a lower Wiring and Pinout
The motor features a 4-wire bipolar configuration. While wire colors can vary between batches, standard Creality-style wiring often follows this order: : Pins 1 and 4 (often Red/Blue or Black/Green)
: Pins 3 and 6 (middle pins on the 6-pin connector are often empty)
To verify your specific motor's coils, you can use a multimeter to check for continuity between pairs; if you feel mechanical resistance when spinning the shaft while two wires are touched together, you have found a coil pair. VREF Adjustment If you are replacing this motor or tuning your Ender 3 printer
, setting the correct VREF is critical to prevent overheating. For a 0.84A rated motor on an A4988 driver , a VREF of approximately is typical for standard operation. for a specific stepper driver? 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
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 stepper motor datasheet
The BJ42D15-26V10 is a specific NEMA 17 stepper motor model, frequently used in 3D printers like the Creality Ender 3 and CR-10 series. While a single official "datasheet" document can be elusive online, its core specifications are widely documented through its use in consumer electronics. Key Technical Specifications Step Angle: 1.8 degrees (200 steps per full revolution). Frame Size: NEMA 17 (42mm x 42mm faceplate). Rated Current: Typically 0.84A to 1.0A per phase.
Wiring: 4-wire bipolar configuration is standard for these models.
Voltage: While often listed as 24V or 26V in part names, this refers to the system supply voltage; the motor itself is current-driven.
Shaft Type: Often a "D-shape" or round shaft depending on the specific printer assembly it was built for. Understanding the Model Number
The "BJ42D15-26V10" code is an internal manufacturer designation where the segments generally represent physical and electrical attributes:
The BJ42D15-26V10 is a NEMA 17 stepper motor manufactured by Keli Motor (often found in Creality 3D printers like the Ender 3). While a direct single-page datasheet for the "26V10" variant is elusive, its specifications are largely standardized across the BJ42D15 series. Core Specifications
Based on manufacturer data and community verification for the BJ42D15 series: Step Angle: 1.8° (200 steps per revolution). Rated Current: 0.84A per phase.
Note: Users often assume 1.0A or 1.5A based on size, but manufacturer specifications for the BJ42D15-26Vxx typically cite 0.84A. Holding Torque: Approximately 2.86 kg·cm (0.28 N·m).
Dimensions: 42mm x 42mm (NEMA 17 frame) with a 34mm body length. Shaft Diameter: 5mm (typically D-shaped). Phase: 2-Phase hybrid stepper. Application Details
Usage: Commonly used for the X, Y, and Z axes on Creality Ender 3 series and CR-10 mini printers.
VREF Tuning: If you are adjusting stepper drivers (like the A4988), aim for a current limit around 90% of the 0.84A rating (approx. 0.75A) to prevent overheating while maintaining torque.
Alternative Identification: You may find this motor cross-referenced as a 42-34 motor in Creality's official documentation.
Are you looking to calculate the VREF voltage for a specific stepper driver like the TMC2209 or A4988?
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. Many beginners mistake "26V" for the supply voltage
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
The BJ42D15-26V10 is a 2-phase NEMA 17 bipolar stepper motor manufactured by Hunan Keli Motor. It is commonly found as a stock component in Creality 3D printers, such as the Ender 3 series, typically used for the X, Y, or Z axes. Key Features & Specifications Step Angle: 1.8∘1.8 raised to the composed with power (200 steps per revolution). Rated Current: Approximately per phase. Note: While some Creality variants are rated up to , technical discussions suggest
is the standard for the 34mm height models like the BJ42D15. Input Voltage: Maximum Holding Torque: Approximately Physical Dimensions: Frame Size: NEMA 17 ( Motor Height: (often referred to as a "42-34" motor). Shaft: diameter, typically "D-shaped" for secure gear mounting. Performance Characteristics Creality Ender 3 Stock Factory Vref · GitHub
BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Keli Motor, commonly used as an OEM component in Creality 3D printers
(like the Ender 3 series). While detailed official datasheets are often difficult to find, technical communities and manufacturer documentation for near-identical variants (like the 26V09 or 26V12) provide the following specifications: Technical Specifications Step Angle : 1.8° (200 steps per revolution). Rated Current 0.84A per phase Input Voltage : Maximum 24V DC. Phase Voltage (Nominal) Holding Torque : Approximately 2.86 kg·cm (0.28 N·m). Inductance : ~9.3 mH. Resistance : ~5.75 Ω. Physical Dimensions
Official Creality 42-34 Stepper Motor with Pressed on Fitting - 3D
The BJ42D15-26V10 is a high-precision, two-phase hybrid stepper motor widely utilized in CNC machinery, 3D printers, and medical instrumentation. This NEMA 17 motor is engineered for applications requiring high torque density and reliable positioning within a compact form factor.
This datasheet provides the essential technical specifications, wiring configurations, and performance characteristics for the BJ42D15-26V10. Technical Specifications
The following table summarizes the core mechanical and electrical ratings for this model. Specification Step Angle 1.8° (200 steps per revolution) Phase Count Rated Voltage Rated Current 1.5 A / Phase Phase Resistance 2.6 Ω ± 10% Phase Inductance 4.8 mH ± 20% Holding Torque 420 mN.m (approx. 60 oz-in) Detent Torque Rotor Inertia Insulation Class Class B (130°C) Weight Physical Dimensions
As a NEMA 17 frame size motor, the BJ42D15-26V10 adheres to standard mounting patterns, making it compatible with most off-the-shelf brackets and extrusions. Frame Size: 42.3mm x 42.3mm Body Length: 40mm (approximate)
Shaft Diameter: 5mm (usually "D-shape" for secure pulley mounting) Mounting Hole Pattern: 31mm x 31mm (using M3 screws) Wiring and Phase Configuration
The BJ42D15-26V10 typically features a 4-wire bipolar configuration. Understanding the wire pairings is critical to prevent damage to your stepper driver. Standard Color Coding: Phase A: Black (A+) and Green (A-) Phase B: Red (B+) and Blue (B-)
Note: If the motor spins in the opposite direction of your software command, reversing the leads of a single phase (e.g., swapping Black and Green) will invert the rotation. Performance Characteristics
1. Precision and AccuracyWith a standard 1.8-degree step angle, the motor provides 200 physical steps per revolution. When paired with a microstepping driver (such as an A4988 or TMC2209) at 1/16 or 1/32 step resolution, the motor achieves exceptionally smooth motion and high positional accuracy. If you measure 1
2. Torque-Speed CurveLike all hybrid steppers, the torque of the BJ42D15-26V10 decreases as RPM increases. To maximize high-speed performance, it is recommended to use a higher input voltage to the driver (e.g., 12V or 24V), as this helps overcome the motor's back EMF.
3. Thermal ManagementUnder continuous 1.5A load, the motor body can become hot to the touch. This is normal for Class B insulation; however, ensuring adequate airflow or using the motor's aluminum mounting as a heat sink will extend the lifespan of the internal bearings. Recommended Applications
3D Printing: Ideal for X, Y, and E (extruder) axes due to its balance of weight and torque.
Desktop CNC: Suitable for light-duty milling and laser engraving.
Automation: Used in pick-and-place machines and automated lab equipment.
Robotics: Provides high holding torque for articulated robotic arms. Integration Tips
Driver Current Limiting: Always adjust the potentiometer on your stepper driver to match the motor's 1.5A rating. Exceeding this current will cause overheating and potential motor failure.
Microstepping: For quiet operation, use a driver with StealthChop technology.
Couplers: Use flexible jaw couplers when connecting to lead screws to account for minor shaft misalignments. If you'd like more specific information, please tell me: Specific driver you are using (e.g., TMC2209, A4988) Voltage of your power supply Mechanical load details (e.g., weight of the axis)
I can then provide custom wiring diagrams or calculate the required torque for your project.
The story of the BJ42D15-26V10 is a classic case of "hardware detective work" within the 3D printing community. While it is a common component in Creality machines, its official datasheet was notoriously difficult to find, leading hobbyists to crowdsource its specifications. The Origin Story The BJ42D15-26V10
is manufactured by Hunan Keli Motor Co.. It is a NEMA 17 bipolar stepper motor widely used for the X, Y, or Z axes in printers like the Ender 3 series. The Technical "Plot Points"
For years, users assumed these motors were rated for 1.5A based on their size (42mm x 34mm), but community investigation revealed a different reality.
Step Angle: 1.8 degrees, meaning it takes 200 steps to complete a full 360° rotation.
Rated Current: Contrary to popular belief, this specific model (and its close sibling, the 26V09) is typically rated at 0.84A per phase.
Torque: It provides a holding torque of approximately 0.4 N.M, providing enough power for standard printer movements without excessive heat.
Physical Profile: It is a "42-34" motor, meaning it has a 42mm faceplate and a 34mm body length. The Community "Ending" Creality Ender 3 Stock Factory Vref · GitHub
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.