Brass motor shaft couplings 3 to 5 mm, 12 pack, provide rigid, reliable joins for mismatched shafts in RC airplanes, boats and robots with M3 threads, 20 mm length, and 9 mm outer diameter for smooth, secure power transfer
✔️ 12x brass motor shaft couplings, M3 thread, 20mm length, 9mm OD
These brass motor shaft couplings are compact, rigid connectors used to join motors and drive shafts with mismatched diameters in RC airplanes, boats, robots, and other metal drive systems. Made from corrosion-resistant brass, they deliver sturdy torque transfer and easy assembly for hobby and light industrial projects.
✅ Thread size: M3✅ Length: 20mm (0.79")
✅ Outer diameter: 9mm (0.35")
✅ Inner hole: 3-5mm (0.12-0.20")
✅ Material: brass, corrosion-resistant, maintenance-free
✅ Includes: 12 couplings, 2 Allen wrenches, 48 screws
💡 What is a brass motor shaft coupling used for in hobby drive systems and RC models?
A handy connector that joins shafts and transmits torque while accommodating diameter differences.
- Handy for RC airplanes, boats, robots, and small mechanical drives
- High torque transfer with low inertia for precise control
- Brass construction offers corrosion resistance and maintenance-free use
- Works with M3 shafts and a range of inner diameters