Rigid Shaft Coupling 4–10mm | RC Boat & Car Motor Connector Set
Rigid Shaft Coupling 4–10mm | RC Boat & Car Motor Connector Set
Rigid Shaft Coupling Set – Precision Motor Connector Sleeve for RC Car, Boat & Mechanical Projects
Keep your RC builds and mechanical transmissions running smoothly with this versatile Rigid Shaft Coupling Set. Machined from 45# steel (GB standard), these couplings deliver solid, slip-free torque transfer between motor shafts — ideal for RC boats, RC cars, DIY robotics, hardware tooling, and general mechanical transmission applications.
The 90° fixing design secured by four machine screws ensures a rock-solid connection that stays locked under load. Each set comes complete with the coupling, four fixing screws, and a hex wrench — everything you need for a quick and confident installation.
Made in Mainland China.
Key Features
- Premium 45# Steel Construction – High-strength GB-grade steel for lasting durability and reliable power transmission
- 90° Fixed Design – Secured by four machine screws for maximum grip and zero slippage
- Multiple Size Options – Choose from 4mm–4mm, 6mm–6mm, 6mm–8mm, 8mm–8mm, or 8mm–10mm bore configurations
- Compact & Lightweight – 22mm length fits neatly within tight RC chassis and mechanical assemblies
- Broad Compatibility – Suitable for RC boats, RC cars, motors, molds, and general mechanical transmission setups
- Silver Finish – Clean, corrosion-resistant surface treatment
Specifications
- Material: 45# Steel (GB)
- Color: Silver
- Length: 22mm
- Outer Diameter: 14mm / 16mm (varies by size)
- Screw Hole Diameter: 4mm
- Available Bore Types: 4mm–4mm | 6mm–6mm | 6mm–8mm | 8mm–8mm | 8mm–10mm
Package Includes
- 1 × Rigid Shaft Coupling
- 4 × Fixing Machine Screws
- 1 × Hex Wrench
Great Pairings for Your RC & DIY Projects
Looking to complete your build? Check out these related products from our store:
- 360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit – Keep your drive components in top shape
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool – Essential for any workshop or DIY setup
- 60cm Motorcycle Luggage Strap – Elastic Helmet Bungee Net – Handy for transporting RC vehicles and gear
Note: Screen color settings may cause slight variation in the appearance of the product color. Please allow for minor measurement tolerances (±0.5mm).
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What bore size options are available for this rigid shaft coupling?
A: This shaft coupling set is available in five bore configurations: 4mm–4mm, 6mm–6mm, 6mm–8mm, 8mm–8mm, and 8mm–10mm. Select the option that matches your motor shaft and driven shaft diameters for a perfect fit.
Q: What material is this motor shaft coupling made from?
A: The coupling is precision-machined from 45# steel (GB standard), a high-strength carbon steel widely used in mechanical transmission components. It offers excellent rigidity, wear resistance, and reliable torque transfer for RC and general mechanical applications.
Q: Is this shaft coupling compatible with RC boats and RC cars?
A: Yes! This rigid shaft coupling is designed for use in RC boats, RC cars, DIY robotic builds, motor assemblies, mold machinery, and a wide range of general mechanical transmission setups. Just select the correct bore size for your motor shaft diameter.
Q: What is included in the package?
A: Each set includes one rigid shaft coupling, four machine fixing screws, and one hex wrench — everything you need for installation right out of the box.