Datasheet Exclusive — Bj42d15 26v10 Stepper Motor
BJ42D15-26V10 Stepper Motor Datasheet Exclusive: Specifications, VREF Tuning, and 3D Printer Optimization
| Parameter | Value | | :--- | :--- | | | 42mm x 42mm | | Body Length | 15mm (Excluding shaft) | | Shaft Diameter | 5mm (Φ5 - Standard) | | Shaft Length | 24mm (Flat cut standard) | | Weight | 140 grams (4.9 oz) | | Number of Leads | 4 | | Lead Length | 300mm (AWG26) | | Rotor Inertia | 12 g·cm² |
26V (Max rating for driver compatibility, though standard 24V systems are typical) Shaft Diameter: 5 mm (D-shape) Usage Note: Vref Adjustment
When converting a printer to direct drive, a (e.g., the "Sherpa Mini" configuration) requires a longer 25mm shaft with a threaded end to accept a hobbed gear. This is not a standard part and must be ordered specially from Keli or modified with a shaft extension. bj42d15 26v10 stepper motor datasheet exclusive
The exclusive torque curve for the BJ42D15 26V10 at 24VDC (chopper drive) is as follows:
If the motor spins in the opposite direction of your software command, simply swap the order of one phase (e.g., swap Red and Blue) to reverse the polarity. 5. Performance Characteristics Torque-to-Speed Ratio
5mm (D-type shaft for secure gear/pulley mounting) Shaft Length: 22mm Mounting Holes: M3 threaded, 31mm apart Wiring and Phase Configuration For high-speed applications
Because datasheets for these specific OEM part numbers are rarely published in a single centralized document, navigating its exact current limits and voltage thresholds can be difficult for makers. This article compiles verified community tests and manufacturer baseline data to give you an exclusive, comprehensive breakdown of the BJ42D15-26V10. 📊 Core Technical Specifications
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
Finding reliable technical data for factory stock components can be surprisingly difficult. 3D printer manufacturers frequently source custom-labeled components directly from industrial suppliers like [Keli Motor Group](https://www.kelimotorgroup.com/stepper-motors/printer-hb-bj42d stepper-motor.html). The BJ42D15-26V10 Go to product viewer dialog for this item. The is a custom-labeled
The BJ42D15-26V10 is a "workhorse" motor. It balances a compact 34mm form factor with enough torque to handle most desktop automation tasks. When tuning your driver, start at 0.8A Vref and increase slowly to find the "sweet spot" between torque and heat.
The is a custom-labeled, highly efficient NEMA 17 hybrid stepper motor manufactured by Keli Motor Group and widely deployed as an OEM component in Creality 3D printers, such as the Ender 3 series and Ender 3 S1 Pro . Despite its ubiquity driving X, Y, or Z-axis movements, an official public datasheet from Creality or Keli is notoriously difficult to secure.
💡 To prevent overheating, ensure your stepper driver's Vref is tuned to deliver no more than 1.5A. For high-speed applications, use a 24V power supply to overcome back-EMF.
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