The RS003A Wild Thumper 75:1 Metal Gear Motor with Encoder is a heavy-duty, high-torque DC gear motor designed for advanced robotics, autonomous vehicles, and precision motion control systems. Built around a rugged all-steel gearbox and integrated with a high-resolution quadrature encoder, this motor delivers a powerful combination of mechanical strength, accurate feedback, and long-term reliability.
This motor is based on the proven Wild Thumper drive platform and features a 75:1 (74.8:1) reduction gearbox, which significantly increases torque while reducing output speed for controlled, stable movement. With a no-load motor speed of approximately 10,000 RPM, the gearbox reduces this to around 133 RPM at the output shaft, making it ideal for robotic platforms that require slow, powerful, and precise motion rather than high speed.
At the core of its feedback system is a dual Hall-effect encoder assembly using custom 8-pole magnets. These sensors generate two square-wave signals that are 90 out of phase, producing 16 state changes per full motor revolution. This allows microcontrollers to accurately determine direction, speed, and position, enabling closed-loop control systems such as PID motor control, odometry tracking, and autonomous navigation.
The encoder is designed for modern embedded systems and supports both 3.3V and 5V logic levels, ensuring compatibility with popular platforms such as Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers. Built-in reverse polarity protection enhances durability and prevents accidental damage during wiring or prototyping.
Mechanically, the motor is constructed for demanding environments. It uses a durable all-steel gear train and a robust 4mm output shaft, ensuring strong torque transfer and resistance to wear under continuous load. The design is optimized for robotics platforms where reliability, torque consistency, and mechanical durability are essential.
This motor is widely used in robotics development, including autonomous ground vehicles, tracked robots, mobile research platforms, and STEM educational systems. Its combination of high torque, encoder feedback, and rugged construction makes it ideal for engineers and hobbyists developing intelligent robotic systems.
Features:
- High-performance Wild Thumper DC metal gear motor
- Integrated 75:1 (74.8:1) all-steel gearbox for high torque output
- Built-in dual Hall-effect quadrature encoder
- 16 state changes per motor revolution for accurate feedback
- Two square-wave outputs (90 phase shift) for direction detection
- Compatible with 3.3V and 5V logic systems
- Reverse polarity protection on encoder circuitry
- Strong 4mm steel output shaft for mechanical durability
- Optimized for closed-loop motor control systems
- Designed for robotics, automation, and autonomous platforms
- Reliable performance under continuous load conditions
Applications:
- Wild Thumper robotic platforms
- Autonomous mobile robots (AMR)
- Line-following and navigation robots
- Odometry and encoder-based positioning systems
- Robotics research and development
- STEM and educational robotics kits
- Industrial prototype automation
- Arduino / ESP32 / Raspberry Pi robot projects
- Outdoor and terrain-based robotics systems
Specifications:
- Part Number: RS003A
- Product Type: Metal Gear Motor with Encoder
- Gear Ratio: 75:1 (74.8:1)
- Motor Voltage: 6V DC (7.5V maximum)
- No Load Motor Speed: 10,000 RPM 5%
- Output Speed: ~133 RPM 5%
- No Load Current: 350 mA
- Stall Current: 5.5 A
- Stall Torque: 8.8 kg cm
- Gear Material: Steel
- Output Shaft Diameter: 4 mm
- Encoder Type: Dual Hall-effect quadrature encoder
- Encoder Magnet: 8-pole custom magnetic rotor
- Encoder Output: Two square waves, 90 phase shifted
- Encoder Resolution: 16 state transitions per revolution
- Logic Voltage Compatibility: 3.3V / 5V
- Protection: Reverse polarity protection (encoder section)
Additional Information:
- Device: Gear Motor with Encoder
- Type: Wild Thumper | 75:1 | RS003A | High Torque Drive Motor
- Use Case: Robotics | Motion Control | Autonomous Systems | Automation
What's in the box
1 x Dgu Wild Thumper Motor Rs003a 75:1 + Enco - Wild Thumper Metal Gear Motor With Encoder 6v Dc
