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）

Just what I was wanting

I bought two sets of these and both were bad. They are cheap so I did not go through the hassle of returning them again. I strongly recommend looking elsewhere. These are NOT the ones you should get. I struggled for days trying to figure out why the printer was failing, only to find out the problem was with the coupler. Bad on me for trusting a cheap product.

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.

Good product

Good idea, I hope it works

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

The plastic slides right out whether vertical or horizontal. The bottom of the clamping screw hole was foil thin. it wouldnt clamp on the stepper shaft

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

one bolt came jammed and the head was already cammed out, the second one didnt have the relief cut all the way through so tightening is impossible

I had to add a layer of aluminum foil around my Nema 17 stepper shaft to actually get it to bite tight enough to have a firm grip. They should design these things with a D-Bottom the same shape as a Nema 17 shaft so they will actually grab....