This motor is a "short" NEMA 17 (34mm length) designed to balance weight and torque. In Creality machines, it is often paired with an TMC2208/2209
| Wire Color | Coil | Polarity (Typical) | | :--- | :--- | :--- | | Red | A | + | | Green | A | - | | Blue | B | + | | Black | B | - | bj42d15 26v10 stepper motor datasheet verified