Bj42d15 26v10 Stepper Motor Datasheet Info

The story of the is a classic case of "hardware detective work" within the 3D printing community. While it is a common component in Creality machines, its official datasheet was notoriously difficult to find, leading hobbyists to crowdsource its specifications. The Origin Story The BJ42D15-26V10

: The amount of torque the motor can produce when it's holding (not moving) at a specific current.

1.8 degrees per full step (200 steps per revolution) Electrical Parameters bj42d15 26v10 stepper motor datasheet

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:

The "BJ42D15-26V10" code is an internal manufacturer designation where the segments generally represent physical and electrical attributes: The story of the is a classic case

Advanced Trinamic silent drivers utilizing StealthChop™ technology for near-silent operation and smooth microstepping.

The "D15" designation creates a body length of approximately 40mm . Excluding the rear protrusion, the total motor depth is roughly 48mm. This is shorter than a standard "D20" or "D25" stack, making the BJ42D15 ideal for space-constrained designs where torque requirements are moderate. Instead of A+, A-, B+, B-, the labels shifted to:

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.

The BJ42D15-26V10 requires a dedicated constant-current (chopper) stepper driver. Do not connect this motor directly to a power supply. Compatible Drivers

The most critical part of using the BJ42D15-26V10 is setting the correct current ( Vrefcap V sub ref end-sub ) on your stepper driver (e.g., A4988, TMC2208, TMC2209). Start with RMS .