| Speed (RPM) | Torque (Nm) | Torque (oz-in) | Application relevance | | :--- | :--- | :--- | :--- | | 0 (Holding) | 0.22 | 31.2 | Maximum gripping force | | 200 | 0.20 | 28.3 | Smooth, slow positioning | | 400 | 0.16 | 22.6 | Light CNC routing | | 600 | 0.11 | 15.6 | Typical 3D printing speed | | 800 | 0.07 | 9.9 | Fast infill moves | | 1000 | 0.04 | 5.7 | Limit for useful torque |
Because it has a higher phase resistance (26Ω) compared to low voltage motors (1.5–5Ω), it draws only 1A at 26V. According to Ohm's Law: V = I × R → 26V = 1.0A × 26Ω. bj42d15 26v10 stepper motor datasheet verified
Introduction In the world of precision motion control, the NEMA 17 stepper motor is a ubiquitous standard. However, within that standard, specific model numbers hide unique performance characteristics. One such model that has garnered attention from CNC machine builders, 3D printer enthusiasts, and industrial automation engineers is the BJ42D15 26V10 stepper motor . | Speed (RPM) | Torque (Nm) | Torque
At 1000 RPM, torque drops by 82% from holding torque, which is typical for stepper motors. For best performance, operate between 300–700 RPM. Part 4: Wiring Diagram and Driver Compatibility The BJ42D15 26V10 follows the standard A, A', B, B' bipolar wiring (4-wire configuration). However, within that standard, specific model numbers hide
| Parameter | Value | Verified Tolerance | Notes | | :--- | :--- | :--- | :--- | | | 1.8° | ±0.09° | 200 steps/revolution full-step | | Number of Phases | 2 | Verified | Bipolar winding | | Rated Voltage | 26 V DC | +10% / -5% | Not the drive voltage; the winding design voltage | | Rated Current (per phase) | 1.0 A | ±5% | RMS current | | Phase Resistance | 26 Ω | ±10% (23.4 – 28.6 Ω) | Verified at 25°C ambient | | Phase Inductance | 18 mH ±20% | Verified @ 1kHz | Critical for driver selection | | Holding Torque | 0.22 Nm (31.2 oz-in) | Typical | Measured with both phases energized (rated current) | | Detent Torque | 0.012 Nm (1.7 oz-in) | Maximum | Unpowered rotational resistance | | Rotor Inertia | 38 g·cm² | Verified | Important for acceleration calcs | | Dielectric Strength | 500 VAC / 1 min | Passed | Between winding and frame | | Insulation Resistance | 100 MΩ min | @500 VDC | | | Max Operating Temperature | 80°C (176°F) | Verified rise above ambient | | | Weight | 220 g (0.48 lbs) | ±5 g | | | Shaft Diameter | 5 mm | Verified | Standard for NEMA 17 | | Shaft Length | 24 mm | Verified | Single flat D-cut |