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）

Will separate when pulled. Doesnt help screw wobble, to stiff of nylon insert. Screws strip easily, wont grip shafts without a lot of torque.

I tried the other type of couplers that look more like a spring on the Z axis lead screws on my Ender 5 Plus but they stretched out and messed everything up. Got rid of those and replaced them with these. These work great and support the weight of the bed with ease. They are not really flexible so these will not solve any Z banding issues but they do stay together and don’t expand like the other type did. They don’t get 5 stars from me because of lack of flexibility but they are decent enough to get 4 stars.

Works as should

Took me some time to figure out what was causing the banding on my print. When I took the lead screw out and looked at the shaft coupler while it spun, you can easily see the top piece wobble, thought it was just a bad z-screw initially, but after replacing that first, it had to be the coupler.

Very good quality product. will recommend to anyone

Semplicemente dopo averli installati sulla mia stampante 3d ho riscontrato un movimento delle aste filettate non trascurabile. Da una parte un po me lo aspettavo vista la natura del pezzo (due pezzi separati con nel mezzo del materiale plastico) ma non così tanto. Il problema secondo me deriva dal non perfetto allineamento tra il foro da 5 mm e quello da 8 e questo accentua le oscillazioni.

Sort of small

These have absolutely no pulling power, the plastic slides right out whether vertical or horizontal. Your z shaft must be secured on the end. They look cool though.

I purchased a cheap flexible shaft coupling for a home made CNC machine and broke it within 2 weeks. I replaced with these more expensive coupling with a different design and these work great even when upgrading my motor from N23 to N34 size. Is still working 6 months later with no problems.

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