Review on 🔌 Befenybay 2PCS 5mm to 8mm Aluminium Plum Flexible Shaft Coupling D20 L25 Connector - Ideal for 3D Printers, CNC Machines, Servo Stepped Motors by Elvis Kimbro

Pulling apart, there's really nothing holding them together. I installed them and shortly after, my printer started making strange noises. Looks like a door hinge that needs oiling. It took several hours to find the source. It turns out that a piece of hard rubber or something between two pieces of metal makes noise. It sounded really awful, like my printer was going to fall apart at any moment. The lead screw(s) Z oscillate like the Eiffel Tower. Thought my screws were lost, hello, hello. So I tested them as best I could and they worked flawlessly. Now I use a solid clutch and everything is fine.