HD Coupling 4mm to 6mm

The Radio Active HD Coupling 4mm to 6mm (I-RMA5746) provides a straightforward way to join a 4mm shaft to a 6mm shaft in RC models and projects. This heavy-duty shaft coupler is intended for situations where motors, drive shafts or hardware use different diameters, offering a neat interface for driveline adaptation.

Suitable for repairs, upgrades and custom builds, this compact adapter supports mixed-size setups commonly encountered across RC applications and general model engineering. It helps simplify motor-to-shaft connections without reworking existing components.

Suggested Compatibility

• 4mm motor/output shafts to 6mm drive shafts or couplers
• RC boats, cars and aircraft using mixed shaft diameters
• Model engineering or robotics projects requiring 4mm-to-6mm interfaces