5mm Wheel Connector / DC Gear Motor Hex Coupling with Screws

5mm Hex Coupling for Robot Smart Car Wheel – Brass – 18mm Length

This durable connector is designed for reliable motor coupling and smooth torque transfer in robotics projects. Because it supports a precise 5mm shaft coupler design, it is widely used in DIY robots, smart cars, and STEM builds. Makers who work with compact wheel systems also prefer this part when creating 5mm to 6mm shaft coupler conversions. Additionally, the strong brass structure ensures that the motor coupling remains stable during operation. Its reinforced machining helps maintain alignment, making the 5mm shaft coupler ideal for builds requiring accurate wheel rotation. Users designing mechanical prototypes benefit from this reliable connection, especially when setting up 5mm to 6mm shaft coupler assemblies. Furthermore, the secure fit allows the motor coupling to handle small robotic vehicles with consistent performance. Because of its compact size, this connector integrates well into smart car chassis. The precise bore supports the 5mm shaft coupler format found in common geared motors, while the hex end improves grip for wheel mounting. As a result, the motor coupling is suitable for a variety of educational, automation, and custom mechanical setups, including 5mm to 6mm shaft coupler transitions used in adaptable wheel systems.

Technical Details

• Item Type: Coupling / Shaft Connector
• Material: Brass
• Inner Diameter (Motor Side): 5 mm
• Outer Hex Diameter: 12 mm
• Thread Size (Top): M4
• Body Length: 12 mm
• Hex Height: 6 mm
• Total Length: 18 mm
• Weight: 14 g
• Set Screw Type: M3 Grub Screw

Features

• High-strength brass construction for superior durability.
• Hexagonal outer design ensures secure wheel attachment.
• Compact 18mm size suitable for small robotic assemblies.
• Easy to install and requires no special maintenance.
• Transfers motor torque smoothly to the wheel hub.

Applications

• Smart car and robot wheel coupling
• DIY and educational robotics projects
• Automation and mini vehicle prototypes
• Motor-to-wheel power transmission systems

Physical Attributes

• Color: Golden (Brass Finish)
• Material: Brass
• Shape: Hexagonal
• Compatible Motor Shafts: 5mm diameter (Johnson Motor, BO Motor, Encoder Motor)
• Operating Torque Range: Suitable for low-power DC geared motors

Package Includes

• 1 × 5mm Hex Coupling – Brass – Short Type – 18mm Length