Description: Shaft coupler Often used to connect servo motor, stepper motor, encoder, screw driving, machine platform, etc. Shaft: Approx. 8 x 12mm / 0.3 x 0.5in Length: Approx. 30mm / 1.2in Diameter: Approx. 25mm / 1in Material: Aluminium Included in the Package: 1 x Shaft Coupler Package List 1Couplings are usually used to connect servo motors, stepper motors, encoders, screw drives, machine platforms, etc. 2The performance of this coupling is stable and reliable, with good shock absorption, cushioning and electrical insulation properties. 3Plum coupling shaft is made of high& 8209;strength aluminum, it has excellent carrying capacity and long service life without lubrication. 4The plum blossom coupling encoder has small radial size and light weight, which is suitable for medium and high& 8209;speed equipment. 5Flexibility of coupling shaft removes stress between the motor and driving components.