The Tamiya Single Gearbox 4-Speed H.E. is a compact educational mechanical gearbox kit designed for robotics, STEM learning, and DIY engineering projects. It uses a single motor system combined with selectable gear ratios to control speed and torque.
🔹 Core Concept:
- ⚙️ Single-motor gearbox design
- 🔢 Offers 4 different gear ratios that can be chosen during assembly
- 🎯 Allows users to switch between speed-focused or torque-focused setups
🔹 Gear Ratios:
The gearbox can be built in one of these configurations:
- 12.7:1
- 38.2:1
- 114.7:1
- 344.2:1
👉 This means you can tune the same gearbox for:
- 🚀 High speed (low ratio)
- 💪 High torque (high ratio)
🔹 Build & Design:
- 🧩 DIY assembly kit (no pre-assembled unit)
- 🔌 Includes a Type 130 motor (in most versions)
- 🛠️ Plastic gearbox housing with metal output shaft
- 🔁 Output shaft supports crank attachments for linear/reciprocating motion
🔹 Key Features:
- 🎯 Simple and reliable single-motor drive system
- 🔧 Adjustable performance through gear selection
- 🤖 Can be used beyond vehicles (robots, mechanisms, moving arms)
- 🔩 3mm hex output shaft compatible with Tamiya wheels and parts
🔹 Applications:
- 🤖 Educational robotics projects
- 🚗 Small DIY cars and tracked vehicles
- 🏗️ Mechanical motion experiments (rotary or back-and-forth movement)
- 🎓 STEM learning (understanding gear ratios and torque)
🔥 Summary:
The Single Gearbox 4-Speed H.E. is a flexible and beginner-friendly mechanical system that helps you learn how gear ratios affect speed and power, while also serving as a solid base for small robotics and