Dummy Motor / Dead Axle for Robot Chassis – 6mm Shaft

Dummy Motor (Dead Axle) for Robot Chassis

Product Description

The Dummy Motor (Dead Axle) is a passive mechanical component designed to provide support for unpowered wheels in robotic chassis. It is shaped to fit standard centre shaft motor mounting brackets, allowing a robot to use additional wheels without installing extra drive motors.

This provides a cost-effective way to build stable 4-wheel robotic chassis using only two powered motors while the dummy motors support the remaining wheels.

Structural Wheel Support

The dummy motor acts as a dead axle, providing a stable mounting point for a free-spinning wheel. It helps keep the chassis balanced and level while reducing the overall weight, cost, wiring, and power consumption of the robot.

Passive Design

Unlike an actual motor, this product contains no electrical components or functional motor gears. It is designed only for mechanical wheel support and does not generate torque or provide powered movement.

Standard 6mm Shaft

The integrated 6mm shaft is compatible with many standard robot wheels. It can also be adapted to other shaft sizes using suitable couplings.

Key Features

• Passive dummy motor / dead axle
• Designed for standard centre-shaft motor brackets
• 6mm wheel shaft
• Lightweight plastic construction
• Supports free-spinning wheels
• Reduces motor and driver requirements
• Helps improve chassis stability
• Suitable for 2WD and 4-wheel robot designs
• Easy to install

Technical Specifications

Feature	Specification
Product Type	Dummy Motor / Dead Axle
Material	High-Quality Plastic
Shaft Diameter	6mm
Function	Passive Wheel Support
Compatibility	Standard Robot Chassis Brackets
Electrical Function	None

Working Principle

The dummy motor is mounted in the same type of bracket used for a compatible centre-shaft motor. A wheel is then attached to its 6mm shaft.

The wheel rotates freely as the robot moves, while the powered motors provide the actual driving force. This arrangement allows a 2-wheel-drive robot to use four supported wheels for improved balance and stability.

Typical Application Scenarios

4-Wheel Robotic Chassis

Use two powered motors for drive and two dummy motors for supporting the additional wheels.

Educational Robots

Useful for line-following, obstacle-avoiding, and school robotics projects where reducing cost and electronics complexity is important.

Trailer Mechanisms

Can be used to support unpowered wheels on robot trailers and other mobile platforms.

DIY Mobile Robots

Suitable for custom robotic chassis where additional wheel support is required without adding powered motors.

Applications

• 2WD 4-wheel robots
• Line follower robots
• Obstacle avoiding robots
• Educational robotics
• DIY robot chassis
• Unpowered wheel support
• Robot trailers
• Custom mobile platforms
• Hobby robotics projects

Product Disclaimer

Product information may vary between manufacturers and production batches. Product images are for illustrative purposes only and may differ from the actual product in colour, dimensions, or appearance.

Important Note

Not a Functional Motor

This product is not an electrically powered motor. It contains no motor drive electronics or functional gearbox and is intended only for mechanical wheel support.

Wheel Compatibility

The shaft is approximately 6mm in diameter. Verify wheel and coupling compatibility before installation.

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