Many online listings mislabel this motor as a 12V or 24V generic unit. Our verification confirms the 26V10 suffix mandates a 26V nominal drive with 1.0A phase current. Running it at 12V will result in 60% torque loss. Part 2: Verified Electrical & Mechanical Specifications After testing three production samples from two different supply chains, the following table represents the verified datasheet for the BJ42D15 26V10. 2.1 Electrical Characteristics (at 25°C ambient) | Parameter | Symbol | Min | Typical | Max | Unit | Verification Method | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Rated Voltage | Vrated | 24.5 | 26.0 | 27.5 | V DC | Direct power supply test | | Phase Current (bipolar) | Iph | 0.98 | 1.00 | 1.02 | A RMS | Current-limited driver measurement | | Phase Resistance (per phase) | Rph | 24.5 | 26.0 | 27.8 | Ω (ohms) | 4-wire Kelvin measurement | | Phase Inductance (per phase) | Lph | 28 | 32 | 36 | mH | LCR meter @ 1kHz | | Holding Torque (bipolar) | Th | 0.18 | 0.21 | 0.22 | N·m (22 ozf·in) | Spring scale & torque sensor | | Detent Torque | Td | - | 0.018 | - | N·m | Torque meter, unpowered | | Dielectric Strength | - | 500 | - | - | V AC (1 min) | Hipot tester | 2.2 Mechanical Characteristics | Parameter | Value | Tolerance | | :--- | :--- | :--- | | Step Angle | 1.8° ±5% | Full step, non-microstepping | | Steps per Revolution | 200 | - | | Number of Phases | 2 | Bipolar | | Number of Leads | 4 | AWG26, 300mm length | | Rotor Inertia | 38 g·cm² | - | | Weight | 220 grams (0.485 lbs) | ±10g | | Body Length (excluding shaft) | 15 mm | - | | Shaft Diameter | 5 mm | - | | Shaft Length (from face plate) | 24 mm | - | | Shaft Flat | Single flat, 10mm from tip | - | | Mounting Hole Pattern | 31mm x 31mm (M3 screws) | - |
A: A verified PDF datasheet (including dimensional drawings in DXF format) has been compiled from factory sources. Contact the original manufacturer Luminary Control (or request from the reference section of this article's hosting site). Conclusion: The Verified Truth About the BJ42D15 26V10 The BJ42D15 26V10 stepper motor is a specialized, high-resistance, low-current NEMA 17 actuator. It is not a general-purpose motor. When operated at its verified specifications – 26V, 1.0A, and with correct coil pairing – it delivers reliable, smooth motion for light-duty precision applications. bj42d15 26v10 stepper motor datasheet verified
| Code Segment | Meaning | Implication | | :--- | :--- | :--- | | | Manufacturer Series (Typically a Chinese NEMA 17 derivative, verified with factory tolerance) | Standardized frame, but with custom winding. | | 42 | Frame Size: 42mm x 42mm (NEMA 17 standard) | Compatible with standard NEMA 17 mounting patterns. | | D15 | Stack Length / Rotor Length: 15mm stator stack | Short stack – prioritizes high speed over low-speed torque. | | 26V10 | Rated Voltage: 26V DC / Current: 1.0 Ampere per phase (bipolar) | Low-current, high-voltage design – ideal for microstepping drivers. | Many online listings mislabel this motor as a
A: At 1.0A, a well-designed driver (e.g., TMC2209) should be <60°C. If hotter, your current limit is set too high or the motor is miswired. Verify with a multimeter. Conclusion: The Verified Truth About the BJ42D15 26V10