Bj42d15 26v10 Stepper Motor Datasheet Better Link

Title: Technical Overview and Specification Guide: The BJ42D15-26V10 Stepper Motor

Conclusion

The BJ42D15 26V10 stepper motor is a specialist component, not a commodity 3D printer motor. Its defining characteristics – 26V rated voltage and 26 Ohm phase resistance – make it uniquely suited for constant voltage drive systems and legacy equipment restoration.

When downloading a datasheet, remember that few manufacturers publish this exact variant publicly. Use the mechanical and electrical tables in this article as your definitive reference. Always verify your motor's resistance with a multimeter before integrating it into a 26V circuit.

Final Engineering Recommendation: Drive this motor using a 24V – 28V DC supply and a constant-current driver set to 1.0A (RMS). Do not attempt to force high speeds beyond 600 RPM due to high inductance. Use it for precision positioning at low to medium speeds, and it will provide reliable, cool, and accurate service for years.

Disclaimer: Specifications are aggregated from multiple industry sources and reverse engineering. Always perform your own validation upon receipt of the physical component.

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) bj42d15 26v10 stepper motor datasheet

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

Closing takeaway

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.

If you want, I can:

Extract exact numeric values (holding torque, resistance, inductance, dimensions) if you provide the official datasheet PDF or a link.
Recommend specific drivers and power supply models matched to this motor.

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

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 Typical performance behavior

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 high-torque NEMA 17 frame motor. However

3. Electrical Characteristics (Per Phase)

| Parameter | Value | |------------------------|---------------------------| | Rated voltage | 26 V DC | | Winding resistance | 10 Ω ±10% | | Rated current (calculated) | 2.6 A (using I = V/R) | | Inductance (typical) | 4–8 mH (assumed) | | Insulation class | B (130°C) | | Dielectric strength | 500 V AC for 1 min |

Note: Running at 26 V / 10 Ω gives 2.6 A – this is high for a small motor. Likely the driver uses chopping (e.g., 24–30 V supply, current limiting to 1.0–1.5 A). Verify with actual datasheet.

Introduction

In the world of precision motion control, the stepper motor remains a fundamental component for applications requiring accurate positioning without the need for feedback encoders. Among the myriad of models available, the BJ42D15 26V10 stepper motor stands out as a robust, high-torque NEMA 17 frame motor. However, finding an official, unified datasheet for this specific variant can be challenging due to branding variations and OEM distribution.

This article serves as a comprehensive technical resource, aggregating all known electrical, mechanical, and thermal specifications for the BJ42D15 26V10. By the end of this guide, you will have all the data required to integrate this motor into your CNC machine, 3D printer, medical device, or industrial automation project.

Mechanical Specifications

Holding Torque: Approx. 0.4 N·m to 0.45 N·m (40-45 N·cm).
Detent Torque: ~0.02 N·m (Torque required to rotate the shaft when not energized).
Shaft Diameter: 5mm (Standard D-cut shaft).
Shaft Length: ~20mm - 24mm.
Radial Play: 0.02mm Max (at 300g load).
Axial Play: 0.08mm Max (at 100g load).

Typical performance behavior

Torque vs speed: holding torque is highest at standstill; torque falls with speed due to inductance and back-EMF. Using a higher bus voltage helps maintain torque at moderate speeds.
Power dissipation: primarily in windings. Lower supply voltage and adequate current-limiting reduce heat but can limit dynamic torque.
Accuracy: step repeatability is typically better than ±5% of a full step per manufacturer claims; microstepping improves apparent resolution but not absolute accuracy without closed-loop sensing.
Backlash: negligible in the motor itself but present in mechanical couplings and gearboxes; minimize with rigid couplings and properly preloaded leadscrews/gears.