Brass Rigid Motor Shaft Coupling is a high quality transmission joint connector that serves as a reliable sleeve adapter for motor transmissions. Available in multiple sizes to meet different needs: 2mm, 2.3mm, 3mm, 3.17mm, 4mm, 5mm, and 6mm. A 4mm to 4mm option is also provided for a precise fit in certain applications. Material and durability: Brass construction delivers durability and stability in shaft connections, supporting consistent power transfer. Design and installation: Single piece construction for easy installation and alignment, providing a seamless, reliable connection. Performance: A rigid coupling minimizes misalignment and backlash, enhancing the efficiency of power transmission. Typical use scenarios: - Connect a stepper motor to a drive shaft in small robotics or RC projects. - Replace worn couplings in 3D printers or compact CNC axes. - Use in prototyping and test rigs that require a compact, dependable sleeve adapter for motor transmissions.