| Model | Frame | Resistance | Voltage | Holding torque | |-------------|-------|------------|---------|----------------| | BJ42D15 26V10 | 42 mm | 10 Ω | 26 V | ~0.3 N·m | | 17HS13-0404S | 42 mm | 40 Ω | 12 V | 0.22 N·m | | 17HS15-1504 | 42 mm | 1.5 Ω | 2.7 V | 0.45 N·m |
![Conceptual diagram of NEMA 17 dimensions: 42mm width, 31mm bolt circle, 5mm D-shaft] bj42d15 26v10 stepper motor datasheet
The is a widely utilized hybrid stepper motor in the automation and robotics industries. Manufactured primarily by Jinye (and rebranded by various distributors), this motor is part of the standard NEMA 17 frame size family. | Model | Frame | Resistance | Voltage
Many beginners mistake "26V" for the supply voltage. This is a fatal error. In practice, you drive this motor with a chopper driver (like an A4988 or TMC2209) at 12V to 24V , while limiting the current to 1.0A. This is a fatal error
Most NEMA 17 motors are rated at 12V or 3.5V. The BJ42D15's 26V rating is unusual . Do not substitute a standard 2.5V/1.5A motor without changing your drive voltage.
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.
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: . Below the diagram, a single line of text appeared: