BJ42D15-26V10 is a NEMA 17 stepper motor frequently used by Creality in their 3D printers, specifically for the Y and Z axes. While detailed official datasheets can be difficult to find, technical specifications from manufacturer Keli Motor and translated sources reveal its core operational parameters. Core Technical Specifications Form Factor : NEMA 17 (42 x 42 mm). Step Angle : 1.8° (200 steps per revolution). Rated Current
: 0.84A per phase. Note that many community sources incorrectly estimate this at 1.5A; using the correct 0.84A is vital for setting accurate VREF on stepper drivers. Holding Torque : 2.86 kg·cm (approximately 0.28 N·m). Input Voltage : Maximum 24V DC. Dimensions : Height of 34mm (often referred to as a "42-34" motor).
: 5mm diameter, often with a "D-shape" or press-fitted pulley depending on the specific lot. Operational Features Creality Ender 3 Stock Factory Vref · GitHub 19 Jan 2025 —
BJ42D15-26V10 is a specialized NEMA 17 hybrid stepper motor manufactured by Hunan Keli Motor Co., Ltd.
. It is widely recognized as a stock component for the X, Y, or Z axes in Creality 3D printers , such as the Ender 3 series. Technical Specifications
Based on manufacturer data and verified community testing, the BJ42D15-26V10 typically adheres to the following parameters: Motor Type : 2-Phase Hybrid Stepper Motor. Step Angle : 1.8° (200 steps per revolution). Rated Current : 0.84A per phase.
: While some generic 42-34 motors are rated at 1.5A, the BJ42D15 series used by Creality is specifically tuned for lower current (~0.84A) to maintain thermal stability. Holding Torque : Approximately 2.86 kg·cm (0.28 N·m). Dimensions : 42 x 42 x 34 mm (Standard NEMA 17 "42-34" frame). Shaft Diameter Input Voltage : Maximum 24V DC. Operational Features Stepper Motor Basics
The BJ42D15-26V10 is a specific NEMA 17 stepper motor commonly found in Creality 3D printers, such as the Ender 3 series. While an "exclusive" datasheet isn't publicly indexed by the manufacturer as a single PDF, technical specifications have been verified through direct manufacturer inquiries and community benchmarking. Core Specifications
Based on the BJ42D series standards from the Keli Motor Group and community data on the GitHub Creality Vref database, the motor follows these parameters: Type: 2-Phase Hybrid Stepper Motor. Step Angle: 1.8∘1.8 raised to the composed with power (200 steps per revolution). Rated Current: Approximately 0.84A.
Note: There is common misinformation that these are 1.5A motors; however, verified data indicates they are rated for a lower current of 0.84A to 1.0A depending on the specific variant. Frame Size: NEMA 17 (
Physical Height: The "15" in the model number typically indicates a stack height or stator length, though this can vary by manufacturer naming conventions. Critical Usage Data
For those integrating this motor into custom builds or adjusting 3D printer settings:
Vref Calibration: If you are using a Creality 4.2.2 or 4.2.7 board, you must calculate the Voltage Reference (Vref) based on the 0.84A limit rather than the often-cited 1.5A to avoid overheating. bj42d15 26v10 stepper motor datasheet exclusive
RMS Current: To find the RMS current for driver configuration (like TMC2209), divide the max rated current by 2the square root of 2 end-root
(approx. 1.414). For a 0.84A motor, this results in an RMS of roughly 0.6A.
Wiring: It typically features a standard 4-pin JST-PH connector, but always verify the pinout for "A+ A- B+ B-" configuration as some Creality cables cross the middle two wires.
BJ42D15 26V10 Stepper Motor Datasheet Analysis and Essay
The BJ42D15 26V10 stepper motor is a specific type of stepper motor commonly used in various industrial and commercial applications. This essay provides a comprehensive overview of the motor's features, specifications, and potential applications.
Introduction to Stepper Motors
Stepper motors are type of electric motors that rotate in discrete steps, allowing for precise control over position, speed, and torque. They are widely used in applications that require accurate positioning, such as robotics, CNC machines, and medical devices.
BJ42D15 26V10 Stepper Motor Specifications
The BJ42D15 26V10 stepper motor datasheet provides detailed information about the motor's performance and characteristics. Key specifications include:
Features and Performance
The BJ42D15 26V10 stepper motor offers several features that make it suitable for a range of applications:
Applications
The BJ42D15 26V10 stepper motor is suitable for a variety of applications, including:
Conclusion
The BJ42D15 26V10 stepper motor is a versatile and reliable motor suitable for a range of applications. Its high torque density, low vibration, and high reliability make it an excellent choice for applications that require precision positioning and high performance. By understanding the motor's specifications and features, designers and engineers can select the optimal motor for their application and ensure optimal performance.
References
BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Hunan Keli Motor Co., Ltd. and is most commonly found as original equipment in Creality 3D printers
(e.g., Ender 3, CR-10 series). Despite its ubiquity, official manufacturer datasheets are often restricted to OEM partners, making technical specifications difficult to source for end-users. Technical Specifications
Based on technical data for the BJ42D15 series used in similar 3D printing applications:
BJ42D15-26V10 is a high-precision NEMA 17 stepper motor frequently utilized in 3D printers, specifically as a replacement part for Creality machines like the Ender-3 S1, Ender-5 S1, and V3 series. Technical Specifications
Based on manufacturer data and community testing, the core specifications for the BJ42D15-26V10
(often referenced interchangeably with similar "42-26" models) include: Step Angle: 1.8 raised to the composed with power (standard 200 steps per full rotation). Rated Current: 0.84 Amps per phase. Motor Frame Size: NEMA 17 (approximately 42mm x 42mm). Body Length: 26mm (indicated by the "-26" in the part numbering). Phase Count: 2-Phase bipolar. Key Performance Insights Current Limit Warning:
While some online communities erroneously assume these motors can handle 1.5 Amps, official specifications for the BJ42 series indicate a much lower rated current of
. Operating above this threshold significantly increases heat and risk of motor failure. Voltage Calibration (Vref): BJ42D15-26V10 is a NEMA 17 stepper motor frequently
To ensure optimal performance without overheating, users often adjust the stepper driver voltage (Vref). For a 0.84A rated motor on common Creality boards
, this usually translates to a specific Vref setting based on the driver type used (e.g., TMC2208 or A4988). Compatibility: This motor is standard for X, Y, and Z axes on several Ender and CR series printers due to its balance of torque and compact size. Identification and Variants The BJ42 series follows a specific naming convention: Refers to the internal coil and winding configuration.
Refers to the physical length of the motor body in millimeters.
Often indicates slight revisions in connector style or minor electrical tweaks, though the core current rating typically remains consistent at for your printer's motherboard driver? Creality Ender 3 Stock Factory Vref · GitHub
The BJ42D15-26V10 is a 42x42x34mm NEMA 17 hybrid stepper motor by Keli Motor Group, commonly utilized in Creality Ender 3 printers for X, Y, or Z axis movements. It features a 1.8-degree step angle, 0.84A rated current per phase, and 2.86 kg·cm holding torque. For optimal performance on Creality boards, Vref should be adjusted to approximately 0.725A–0.75A to avoid overheating. Creality Ender 3 Stock Factory Vref · GitHub
In the world of motion control, component selection is everything. When your application demands a balance of torque, thermal efficiency, and step accuracy, the BJ42D15 26V10 stepper motor emerges as a top contender. However, finding a comprehensive, exclusive breakdown of its datasheet can be challenging. This article serves as your ultimate technical guide, dissecting every parameter, electrical characteristic, and mechanical drawing you need for integration.
Unlike standard motors, the 26V input allows this unit to maintain 80% of its holding torque up to 300 pulses per second (PPS). Here is the exclusive performance curve summary:
Recommendation: Operate between 150 and 500 PPS for optimal smoothness with a 26V microstepping driver (e.g., 1/8th step mode).
Because the resistance is 26Ω per phase, at 1.0A, the power dissipation is:
[ P = I^2 \times R = (1.0)^2 \times 26 = 26 \text Watts per phase ]
Total maximum dissipation (both phases active) = 52 Watts.
Given the 220g mass and surface area, the motor will reach a steady-state temperature of approximately 65°C above ambient after 30 minutes of continuous operation at 26VDC. This is within Class B limits (130°C total), but heatsinking is advised for 24/7 operation.
The BJ42D15 26V10 is not a general-purpose motor. Its 26V winding makes it distinct. Here’s where it excels: Model: BJ42D15 26V10 Step Angle: 1