Bj42d15 26v10 Stepper Motor Datasheet Exclusive May 2026

| Parameter | Typical / Assumed Value | |---|---| | Frame size | 42 mm | | Step angle | 1.8° | | Rated voltage | 26 V | | Rated current | 10 A | | Phase resistance | ~2.6 Ω (estimate) | | Inductance | 1–10 mH | | Holding torque | 0.3–0.8 N·m | | Shaft dia. | 5 mm | | Mounting | NEMA17 pattern |

If you want, I can: (a) format this into a printable PDF-style datasheet, (b) generate a wiring diagram for a bipolar 4-wire connection with a chopper driver, or (c) draft lab test procedures with detailed instruments and pass/fail criteria — tell me which.

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The BJ42D15-26V10 Go to product viewer dialog for this item.

is a NEMA 17-sized bipolar stepper motor commonly used in precision automation, specifically within the paper-handling mechanisms of photocopiers and laser printers.

Below is a structured technical summary based on available specifications for this motor series. Core Mechanical Specifications Frame Size: NEMA 17 (42mm x 42mm).

Step Angle: 1.8° (200 steps per revolution), providing a balance of speed and torque.

Shaft Type: Typically a "D" shaft to prevent pulley or gear slippage.

Body Length: Approximately 34mm to 40mm depending on the specific revision. Electrical Characteristics

Rated Voltage: 26V DC (often driven by 24V power supplies common in industrial printers). Winding Resistance: 10 Ohms per phase. Rated Current: Roughly 0.8A to 1.0A per phase. Configuration: 2-Phase bipolar (4-wire). Typical Performance Holding Torque: Estimated at 0.4 N.m (approx. 56 oz-in). bj42d15 26v10 stepper motor datasheet exclusive

Operating Speed: Efficient between 1–1000 RPM, depending on the microstepping driver used. Applications:

Paper Feed Units: Precise advancement of media through printing rollers.

3D Printing: Often used for X, Y, or Z-axis movement in desktop printers like the Creality Ender series.

Small Robotics: Ideal for lightweight CNC or scanning equipment. Wiring Diagram (Standard Bipolar) Color (Typical)

For precise integration, it is recommended to adjust the driver's VREF (Voltage Reference) to ensure the current does not exceed 1.0A to prevent overheating.

How to Adjust VREF / Stepper Motor Current on Ender 3 (Pro/V2)

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 ( | Parameter | Typical / Assumed Value |

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.

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.

Title: Deep Dive: Uncovering the Secrets of the BJ42D15-26V10 Stepper Motor

For electronics hobbyists, robotics engineers, and CNC builders, the stepper motor is the heartbeat of precision movement. While big names like NEMA 17 and NEMA 23 dominate the conversation, there is a specific model that frequently pops up in surplus markets, printer upgrades, and industrial salvaging operations: the BJ42D15-26V10.

If you’ve found one of these in a bin of parts or are looking for a datasheet, you might have noticed that clear, official documentation is surprisingly hard to find. In this post, we are providing an exclusive breakdown of the specifications and practical applications for this specific motor, aggregating data from various industrial sources to create the datasheet you’ve been looking for. The BJ42D15-26V10 Go to product viewer dialog for

Understanding the naming convention is the first step to unlocking the motor’s capabilities:

The popularity of "BJ42" series motors has led to a flood of counterfeit units labeled BJ42D15 but with 4Ω windings (designed for 5V). These fakes burn out instantly at 26V.

Note: The simple V/I ratio above is a rough estimate; actual resistance is usually lower and drive uses current-limiting chopper drivers with higher supply voltage.

At 26V and 1.0A continuous, the motor’s surface temperature stabilizes at approximately 65°C – 75°C (ambient 25°C) without active cooling. This is within safe limits for Class B insulation (130°C).

The BJ42D15 26V10 uses a standard 4-lead bipolar configuration. The wire color code (exclusive to this revision) is as follows:

| Wire Color | Phase | Polarity | | :--- | :--- | :--- | | Red | Phase A | A+ | | Green | Phase A | A- | | Yellow | Phase B | B+ | | Blue | Phase B | B- |

Connection Guide:

When mounting the BJ42D15 26V10, adhere to these exclusive dimensional clarifications not always found in basic datasheets: