Flexible coupling with holes of 4mm and 5mm diameter is intended for connection with the motor for RepRap 3D and CNC printers. The coupling is perfect for servo motors, stepper motors, encoders, trapezoidal screws etc. Cushioned, flexible aluminum coupling is used in 3D printers, milling machines and 3D plotters to transfer the drive from the Z-axis stepper motors to the guide, rod. Product features Aluminum coupling for RepRap 3D printers. Clamped with Allen screws. Characterized by low weight and a small moment of inertia with high transmitted torque. Removes the stresses arising from the transmission ratio of the drive. Technical data Hole diameters: I - 4 mm II - 5 mm Outer diameter: 18 mm Length: 25 mm https://elecena.pl/product/22895451/4-5-mm-flexible-aluminum-coupling 2023-03-16 https://elecena.pl/product/22895451/4-5-mm-flexible-aluminum-coupling 2025-10-29