Bj42d15 26v10 Stepper Motor Datasheet
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
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
I cannot directly access or retrieve specific PDFs, proprietary datasheets, or real-time external documents, including the exact datasheet for a part number like BJ42D15 26V10 (which appears to be a hybrid stepper motor, likely from a Chinese or OEM manufacturer such as BJX Motor, Changzhou, or similar).
However, I can prepare a simulated/reference technical paper based on standard specifications for a NEMA 17 or 42 mm frame hybrid stepper motor with 26V/phase and 10 Ω/phase typical characteristics, as implied by the code.
Below is a structured technical paper you could use as a template. If you obtain the real datasheet, you can replace the assumed values.
Thermal Considerations
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.
Decoding the BJ42D15 26V10 Stepper Motor: A Comprehensive Datasheet Analysis
Understanding Stepper Motor Datasheets
When looking at a datasheet for a stepper motor like the BJ42D15 26V10, here are some key parameters and specifications you would typically find:
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Model Number: BJ42D15 26V10 - This unique identifier can help in finding the specific datasheet.
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Motor Type: Stepper Motor - Specifically, it might be a part of the series or family of stepper motors.
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Step Angle: This indicates the angle through which the motor shaft moves for each input pulse. For a standard stepper motor, it might be 1.8 degrees (200 steps per revolution) or 0.9 degrees (400 steps per revolution), but it depends on the motor. bj42d15 26v10 stepper motor datasheet
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Holding Torque: The amount of torque the motor can produce when it's holding (not moving) at a specific current.
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Rated Voltage: 26V - This is the voltage at which the motor is designed to operate optimally.
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Rated Current: This is usually given in Amps per phase. For example, if it's 1A/phase, you would need to ensure your driver can supply this current.
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Resistance/Phase: This is the resistance of one phase of the motor, usually measured in Ohms.
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Inductance/Phase: Measured in mH, this is another critical parameter for designing with stepper motors.
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Operating Temperature: The range of temperatures in which the motor can operate.
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Physical Dimensions: Including the mounting hole positions, overall dimensions, and shaft details.
🌡️ Thermal Management
At 1.0 Amps, this small motor will get warm (around 50°C - 60°C) after extended use. This is completely normal and safe (the insulation class is 130°C). However, if you accidentally set your driver to 2.0A, the motor will overheat, the magnets will demagnetize, and the motor will permanently lose torque. Double-check your current limit.
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:
Dr. Elara Vance stared at the blinking cursor on her terminal. The lab was silent except for the low hum of the climate-controlled archive. On her screen was the only clue the university’s investigation team had given her: a file name.
bj42d15 26v10 stepper motor datasheet.pdf The BJ42D15-26V10 is a NEMA 17 stepper motor
It looked mundane. Boring, even. A spec sheet for a hybrid stepper motor—bipolar, NEMA 17 frame size, 42mm body, 1.8-degree step angle. The "26v10" likely meant 2.6 volts at 1.0 amperes per phase. She’d seen a hundred such documents.
But this one had been encrypted with a military-grade timestamp, locked inside the personal drive of Professor Aldric Kaine, who had vanished three weeks ago. And the university’s AI security watchdog had flagged it as a "cognitive hazard."
Elara took a sip of cold coffee and double-clicked.
The PDF opened normally. Page one: mechanical drawings. Page two: wiring diagrams. Page three: torque-speed curves. She squinted. Nothing. Then she noticed the pull-down menu at the bottom of the reader: Layers.
There were five layers. The first four were the standard datasheet. The fifth was labeled d15_schematic.
She clicked it.
The diagram warped. The standard bipolar winding diagram re-drew itself into a toroidal knot—a Möbius coil. The pinouts changed. Instead of A+, A-, B+, B-, the labels shifted to: Ψ1, Ψ2, Ψ3, Ψ4. Below the diagram, a single line of text appeared:
"When driven at 26.10 kHz, the rotor becomes a temporal stator."
Elara’s breath caught. She was a robotics engineer, not a physicist. But she knew that a stepper motor moved in discrete steps by energizing coils in sequence. If you drove it at exactly 26.10 kHz—not 26.1, not 26.11, but 26.10—the magnetic field wouldn't just rotate. According to this schematic, it would fold.
She scrolled down. Page four was no longer torque curves. It was a handwritten journal entry, scanned in Aldric’s neat script.
"Day 43: Built the bj42d15 with graphene windings and a beryllium-copper rotor. Applied 26.10 kHz square wave via the Ψ-configuration. The rotor didn’t move. Instead, the air around it grew cold. My watch ran backward for 11 seconds."
Page five:
"Day 47: Placed a live mouse in a Faraday cage 10cm from the motor. Ran the sequence for 3 seconds. The mouse appeared on the other side of the lab, inside a sealed glass jar. Alive. Unharmed. The jar was manufactured in 2029. Today is 2026."
Elara’s hands trembled. She looked at the small, unassuming motor sitting in the evidence locker camera feed on her second monitor. It was the size of a spice jar. Black casing. Four thin wires. It looked like something from a 3D printer.
Page six was the last. Aldric’s handwriting had become jagged, panicked. Thermal Considerations The motor is rated for a
"It doesn't move matter through space. It moves the observer through time. Each step is a Planck-length shift along a closed timelike curve. I’ve run it for 10 seconds at 26.10 kHz. I’ve seen the library’s east wing as it was in 1987. The problem is… I’m no longer sure which version of me wrote this entry. If you’re reading this, do not—"
The text cut off. The rest of the page was a single line of motor control code:
digitalWrite(Ψ1, HIGH); delayMicroseconds(19.157); digitalWrite(Ψ2, HIGH); ...
The final line: "The datasheet is the key. The motor is the lock. The frequency is the turning."
Elara closed the PDF. The cursor blinked. Then her phone rang. Caller ID: Prof. Aldric Kaine. But the date on her watch had just ticked backward by one second.
And somewhere in the lab, the little black stepper motor clicked once—a single, perfect 1.8-degree step into yesterday.
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?