If you are tinkering with CNC machines, 3D printers, or robotics, you have likely come across the ubiquitous NEMA 17 form factor. Among the sea of hybrid stepper motors, the is a model number that pops up frequently in surplus markets and imported hardware lists.
| Parameter | Value | Tolerance | | :--- | :--- | :--- | | | 1.8° ±5% | Full step, non-microstepping | | Steps per Revolution | 200 | - | | Number of Phases | 2 | Bipolar | | Number of Leads | 4 | AWG26, 300mm length | | Rotor Inertia | 38 g·cm² | - | | Weight | 220 grams (0.485 lbs) | ±10g | | Body Length (excluding shaft) | 15 mm | - | | Shaft Diameter | 5 mm | - | | Shaft Length (from face plate) | 24 mm | - | | Shaft Flat | Single flat, 10mm from tip | - | | Mounting Hole Pattern | 31mm x 31mm (M3 screws) | - | bj42d15 26v10 stepper motor datasheet verified
A: At 1.0A, a well-designed driver (e.g., TMC2209) should be <60°C. If hotter, your current limit is set too high or the motor is miswired. Verify with a multimeter. If you are tinkering with CNC machines, 3D
: While rated for 26V, it is typically used with 12V or 24V power supplies in 3D printers. If hotter, your current limit is set too
The is a high-precision, 2-phase hybrid stepper motor primarily manufactured by Hunan Keli Motor Co. and commonly used in Creality 3D printers like the Ender 3 series . While often referred to as a "Creality 42-34 motor," the "BJ" prefix indicates its origin from Keli Motor. Technical Specifications Summary