Bj42d15 26v10 Stepper Motor Datasheet [TESTED]

The BJ42D15-26V10 is designed around a hybrid stepper topology. It combines permanent magnets with a multi-toothed rotor to achieve high holding torque and precise stepping increments. NEMA 17 (42 mm x 42 mm faceplate). Configuration: Bipolar, 4-wire termination.

| Symptom | Datasheet Check | Solution | | :--- | :--- | :--- | | Motor gets hot (70°C+) | Rated Current = 1.0A | Measure driver current. Reduce Vref until current is 1.0A peak. | | Low torque / skipped steps | Holding Torque = 0.22 N·m | Verify you are using microstepping (1/16 or 1/8). Increase supply voltage to 24V. | | Motor won't turn | Phase Resistance = 2.6Ω | Check continuity. If > 10Ω, winding is burned open. Replace motor. | | Noisy, growling sound | Inductance ~ 4mH | Lower the driver decay mode (set to mixed decay). |

Typically, the KELI BJ42D series offers performance curves similar to other NEMA 17 motors. A typical curve shows torque decreasing as speed (PPS) increases. For example, a comparable model, BJ425D5-TW01, operates at 24V with a current of 0.4A to 1.8A, generating torque that declines as speed increases. Therefore, the actual torque produced by the BJ42D15-26V10 will depend on the chosen driver and operating voltage. bj42d15 26v10 stepper motor datasheet

To avoid skipping steps or overheating your motor, you must correctly set the motor driver's reference voltage (VREF). In desktop 3D printers using drivers like the A4988 or TMC2208/TMC2209, setting the current to roughly balances cool operation with ample torque. BJ42D15-26V10 rated at a maximum current ( Imaxcap I sub max end-sub ) of 0.84A, the target driving current ( Iruncap I sub run end-sub ) should be:

Depending on your driver type, use the following formulas to calculate VREF: The BJ42D15-26V10 is designed around a hybrid stepper

While official standalone PDF documentation can be notoriously difficult to find for specific OEM batch numbers, community testing, manufacturer correspondence, and cross-references from the Keli Motor Group establish the standard datasheet metrics for the BJ42D15-26V10 variant: Specification Profile NEMA 17 (42 mm × 42 mm) Body Length 34 mm (Often referred to as a "42-34" motor) Step Angle 1.8° (±5% accuracy per full step) Steps Per Revolution Phase / Configuration 2-Phase Hybrid / Bipolar Rated Voltage Maximum 24V – 26V DC Rated Current (Peak) 0.84A – 1.0A max Holding Torque ~2.86 kg·cm (0.28 N·m / 40 oz-in) Shaft Diameter & Style 5mm "D-Shape" or Round (varies by production lot) Insulation Class Class B (Safe operating temperature up to 80°C rise) Understanding the Part Number (Decoded)

BJ42D15-26V10 is a NEMA 17 hybrid stepper motor manufactured by Hunan Keli Motor Co., Ltd. and is commonly found in Creality 3D printers like the Ender 3 series. Core Specifications Configuration: Bipolar, 4-wire termination

This article provides a deep dive into the , covering its technical specifications, electrical characteristics, pinout configuration, and application tips. 1. Introduction to the BJ42D15-26V10

| Model | Frame | Resistance | Voltage | Holding torque | |-------------|-------|------------|---------|----------------| | BJ42D15 26V10 | 42 mm | 10 Ω | 26 V | ~0.3 N·m | | 17HS13-0404S | 42 mm | 40 Ω | 12 V | 0.22 N·m | | 17HS15-1504 | 42 mm | 1.5 Ω | 2.7 V | 0.45 N·m |

Based on the datasheet analysis, this motor is best deployed in: