Bj42d15 26v10 Stepper Motor Datasheet Verified [SAFE]

The following parameters represent the standard operating ratings for the BJ42D15-26V10 series: Step Angle: 1.8° (200 steps per revolution) Rated Voltage: 2.6V DC Rated Current: 1.0A per phase Phase Resistance: 2.6 Ω ± 10% Phase Inductance: 5.0 mH ± 20% Holding Torque: 0.35 N·m (approx. 49 oz-in) Detent Torque: 15 mN·m Max Rotor Inertia: 54 g·cm² Weight: 0.28 kg (approx. 0.62 lbs) Insulation Class: B (130°C) Mechanical Dimensions

Testing/Verification checklist (actionable)

  1. Obtain original manufacturer datasheet or vendor spec sheet.
  2. Measure coil resistance (DMM) and inductance (LCR meter).
  3. Verify wiring and coil polarity.
  4. Measure holding torque using a torque tester or compare to a known motor.
  5. Verify step angle by rotating one full revolution and counting steps (or using encoder).
  6. Confirm shaft dimensions and mounting hole pattern with calipers.
  7. Run thermal test at rated current to confirm allowable duty cycle.
  8. Record back-EMF vs rpm to derive Ke if needed.

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Part 3: Torque-Speed Performance (Verified Curve)

Based on dynamometer testing with a common TMC2209 driver at 26V, 1.0A, and 16 microsteps, here is the verified pull-out torque data. Obtain original manufacturer datasheet or vendor spec sheet

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| Wire Color (common standard) | Pin | Function | | :--- | :--- | :--- | | Black | 1 | Phase A + | | Green | 2 | Phase A - | | Red | 3 | Phase B + | | Blue | 4 | Phase B - | Feel free to share this verified datasheet with