Befenybay 2PCS 5mm to 8mm Aluminium Plum Flexible Shaft Coupling D20 L25 Connector Flexible Coupler for 3D Printer CNC Machine and Servo Stepped Motor（5x8mm）

I like these type of coupler alot better than the set screw type because the set screw type you can never get them exactly on center. with these friction type they stay on center and nothing damages the lead screw

Sort of small

Should work fine on a 3d printer, but its horrible on a CNC machine.

Definitely not a precision product, but the work for hobby applications.

Na het veranderen van mijn Z as op mijn CNC had ik een andere koppeling nodig, nu heb ik er ook meteen eentje reserve.

Works well on Z-axis lead screw for my Ender 3, and is a definite upgrade to the stock coupler. The finish is decent, and seems pretty solid. My only complaint is that the coupler will come apart fairly easily if you apply any form of tension pulling on the coupler, which can get very annoying if youre used to pulling up on the X-axis gantry to manually raise it. Thats 100% a design shortcoming specific to my application, and not a fault from manufacturing.

Works great used it to replace a damaged coupling on my ender 3v2, only issue I encountered was the screws not quite fastening the coupling to the Z motor properly, which was fixed by using the screws for the original coupling.

Quality of coupling itself and screws is really bad. I would avoid as it is not worth the hassle of ruining your motor is the coupling seizes and you are unable to get it off.

All good as expected

I used these on my 3D printer and they work great. Excellent quality