Copper Coupling (4mm)

The Copper Coupling (4mm) connects standard DC gearmotors directly to drive wheels for robot chassis and mobile platforms. Fully CNC-machined from copper-plated stainless steel, it is a robust hardware solution ideal for students, hobbyists, and makers building custom robotics projects.

Precision CNC-machined construction

Machined with high precision, this copper-plated stainless steel coupling provides durable and reliable torque transfer between motor shafts and wheels. It weighs 31.6g (±0.2g) and is built to withstand continuous use in mobile robotic systems.

Shaft bore and overall dimensions

The coupling features a 4mm inner bore designed to match standard 4mm motor shafts. The outer profile measures 11.5mm in diameter by 18mm in total length.

Broad motor and wheel compatibility

This connector is tailored for DFRobot rubber wheels as well as a wide range of standard DC gearmotors with compatible shaft profiles.

Adaptable motor mounting specifications

The coupling aligns with standard geared motor shaft geometry to ensure a secure, slip-free mechanical fit during robot operation.

Package contents and hardware

Each pack includes two 4mm copper couplings and four M4 set screws to secure the couplings firmly to your motor shafts.