uxcell 12-Piece Set 3mm to 4mm Brass Shaft Coupling Joint Connector with Threads, Flexible Motor Shaft Coupler for RC Model Car Airplane Motor Wheel

Brass shaft coupling connectors are made of pure brass, making them sturdy, reliable, and functional. They are used to connect motor shafts and hexagonal wheels on robots, vehicles, and other models. They are suitable for connecting model shafts and are the perfect accessory for RC model motors. Flexible motor bearing couplings are available in the following sizes: Hole diameter: 3mm to 4mm / 0.12 to 0.16"; Outer diameter: 9mm / 0.35"; Height: 20mm / 0.79"; the package includes 12 brass shaft couplings and 48 screws. Brass bearing couplings are high-temperature, corrosion-resistant, and oil-resistant, ensuring a long service life. They provide greater shaft stability and are easy to install and replace. Easy to install and use, they are primarily used to connect two optical shafts of different diameters, connect a motor and an optical shaft, or connect shafts of different diameters. Please be sure to select the appropriate size before purchasing.