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）

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

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.

Such a simple upgrade elevated the z axis binding o had after upgrading to dual z axis motors

Good idea, I hope it works

this coupler has one job: be straight. It isnt. Its off by at least 2-3 degrees, which takes considerable torque to overcome if your motor is mounted firmly. I think (think, not positive) the problem is in the rubber piece, not the aluminum. The rubber is tight fitting and allows no play, which would be good... if it were straight. I sanded the rubber ears down and introduced a bunch of slop so that my motor would quit stalling as it binds up every rotation. I used it for something that doesnt require any precision so it was good enough after I fixed it, but i would not recommend this for any kind of 3d printer or CNC.

Needes for 10mm stepper shafts amd 1605 ball screws.

These are bored off center and wobble all over the place. There is noway they will work on a CNC printer. I would not purchase these at all.

The machining is horrible. I dont know if its made of aluminum or plastic.

For some reason the flexible couplers milled from a single piece of aluminum tend to shear on my DIY CNC machine on both the X and Y axis. Ive tried different brands and suppliers, including the one in the photo, with the very same results. Within 6 hours of run time it breaks on the simplest of carves, ruining my workpiece. As you can see in the photo and the pictured break, one has to question the mill stock used vs. who mills these from that stock. However, since changing to this 3 piece design, Ive been running fine without any issues or mid-carve failures!!! Thanks!

Good quality, much better than stock couplings.