Guang Dong Lihua Mechatronics Co.,Ltd
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28BYJ48 4 Phase Motors Miniature Stepper 5V DC Low Speed High Torque Motor
28BYJ48 4 Phase Motors is an excellent first stepper motor, ideal for small projects and experimenting with stepper motors. This uni-polar motor features a built-in mounting plate with two mounting holes. It offers 32 steps per revolution (11.25 degrees), with an internal 1/16 reduction gear set (technically 1/16.128, but 1/16 is a close approximation). This results in 516.096 steps per revolution (32 × 16.128). The shaft is flattened, making it easy to attach components using a set-screw. It’s a perfect beginner stepper motor and pairs well with the Motor Shield for Arduino.
The gearing introduces a few important considerations. First, avoid using interleaved or micro-stepping control, as it will significantly slow down rotation. Instead, use single or double stepping. While the torque is relatively high, the motor is slower than un-geared steppers. We achieved a maximum speed of 12 RPM by over-driving it with 9V DC. At 5V, it’s best to keep the speed under 6 RPM.
28BYJ48 4 Phase Motors Miniature Stepper 5 Wires Datasheet and Size
Model .: 28BYJ48
Step angle:(1-2phase driving) 5.625°/64; (2-2 phase driving) 11.25°/step
Gear ratio: 16:1 / 25:1 / 32:1 / 48.8:1 / 64:1 / 85:1
Customizable items:
Voltage:5~24V; gear ratio, gear material, output shaft design customizable
| Voltage (V) | Resistance (Ω) | Pull-in torque 100PPS (mN*m) | Detent Torque (mN*m) | Unload pull-in Frequency (PPS) |
| 5 | 18 | ≥98 | ≥29.4 | ≥500 |
| 12 | 60 | ≥117 | ≥29.4 | ≥500 |
| 12 | 70 | ≥68.7 | ≥29.4 | ≥500 |
| 12 | 200 | ≥68.7 | ≥29.4 | ≥500 |
| 12 | 300 | ≥58.8 | ≥29.4 | ≥500 |
The 28mm permanent magnet (PM) stepper motor is a highly efficient and precise motor designed for a wide range of applications. Below are its key technical features and application highlights:
Winding Options: Available in bipolar configurations for versatile performance.
Maintenance-Free: Brushless design ensures long-lasting operation with minimal upkeep.
Cost-Effective: Compact design reduces integration costs while maintaining high performance.
Digitally Controlled: Easy to interface with microprocessors for seamless integration.
Open-Loop Control: No encoders required, simplifying system design and reducing costs.
HVAC/R Valve Actuation:
Provides precise control for valve positioning in heating, ventilation, air conditioning, and refrigeration systems.
Office Automation:
Used in printers, copiers, and data storage devices for reliable and maintenance-free operation.
Medical Devices:
Powers saliva analyzers and hematology analyzers, ensuring accurate sample mixing and movement for reliable diagnostic results.
Robotics & Industrial Automation:
Enables precise motion control in robotic arms, welding machines, and automated systems.
Telecommunications:
Used in antenna positioning systems for accurate alignment and signal optimization.
Smart Security Products:
Integrated into security doors and automatic sensor doors for smooth movement and precise positioning.
Fiber Optic Fusion Splicers:
Controls the placement and alignment of optical fibers, ensuring high precision in fusion splicing.
Digital Electronics:
Powers autofocus cameras, smart bracelets, and other devices requiring smooth motion and precise positioning.