The 5mm to 8mm Flexible Shaft Coupler joins shafts of different diameters while helping to compensate for minor misalignment, making it a great choice for CNC machines, stepper motor setups, and other precision motion projects. Connect this to that with a set-screw coupler. These couplers are made of machined aluminium and have a spiral cut that makes them slightly flexible so they can be fit to two shafts even if they are not perfectly co-linear and will help reduce binding effects. The way they're cut, they're a little springy in the X Y & Z linear axis but not in the rotational axis. That means that you won't get increased backlash - so they're suitable for precision CNC work. This coupler will connect a 5mm diameter shaft to an 8mm diameter shaft. A perfect add on for our stepper motors. Comes with two sets of double set-screws (two per side) for secure attachment. You'll need a 2mm allen wrench to tighten/loosen the set-screws. Please note: Stepper Motor is not included. Features * Machined aluminium construction * Connects 5mm to 8mm diameter shafts * Spiral cut design provides slight flexibility in X, Y & Z axes * Reduces binding effects from misaligned shafts * No rotational flex means minimal backlash * Suitable for precision CNC applications * Includes two sets of double set-screws (four screws total) * Requires 2mm allen wrench for installation * Compatible with stepper motors Specifications * 25mm x 18mm diameter * 8mm inner diameter * 15g Package Contents * 1x Aluminium Flex Shaft Coupler - 5mm to 8mm * 2x Double set-screws Stepper Motor is not included. https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2023-03-06 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2023-12-27 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2024-09-19 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2024-11-29 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2024-11-30 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2025-04-09 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2025-11-28 https://elecena.pl/product/22710843/aluminium-flex-shaft-coupler-5mm-to-8mm 2025-11-29