Double-Diaphragm Damping Shaft Couplings 5mm to 8mm Aviation Aluminum Alloy for All 3D Printer Such as CR-10S Ender 3 PRO and CNC Machine（2PCS）

Lead screw was wobbling even worse after installing this and it looked like it was spinning on a angle

Honestly, if 3D printer manufacturers spent half as much money on their couplers as this company spends on its packaging, I wouldn't have even had to buy new ones. These things came in individual resealable anti-static bags (for who knows what reason( inside a very nice hard plastic case, inside a very nice cardboard box.. incredibly unnecessary, but they look very nice and they do their job. They worked great on my Ender 5 Plus. I may even buy more for the y-axis.

These appear high quality make, but with only one screw to secure both motor shaft and z screw, these cause MORE wobble than anything you would’ve gotten originally from you 3D printer manufacturer. There is way too much play at either end, and securing both causes the z screw to be located extremely off center. The diaphragm in the middle is very securely held, and would provide really nice secure side movement to eliminate the z binding, if not for the way the motor shaft and screw are secured. A shame, really! I had high hopes for it. Had to go with an alternative, of lesser build quality, but with a better centering solution. This would benefit from having 3 or 4 centering screws for top and bottom, maybe.Disappointed, for sure.

The factory connector from Creality is garbage, caused a wobble in my Z axis. With this and the stabilizing bearing it made a big difference in print quality.