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)

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$12.99

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78 Ratings
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Reviews
  • Robert in Fort Collins, CO

    > 24 hour

    In my case the two shafts were not concentric causing horrible wobbles in my 3D printer. It’s possible the plastic insert was matched to the coupling pair. That’s not ok if you never take these apart. They are being returned.

  • Judge

    > 24 hour

    To tighten it you need to apply excessive force on the screws. There is the danger to destroy the threads on the top of the screws and not be able to remove it.

  • Shana

    > 24 hour

    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.

  • Trent hamilton

    > 24 hour

    5mm was small. Had to drill it out a little bit.

  • Diesalot

    > 24 hour

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

  • michael smith

    > 24 hour

    Factory coupler that came with the 3d printer striped right out of the box. Ridiculous I had to order parts the day I bought it. Luckily this piece fits to spec. And I have a second one just in case.

  • M Xavier

    > 24 hour

    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....

  • Mark S. Lawler

    > 24 hour

    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!

  • Bad Egg

    > 24 hour

    worked as it should and am well pleased

  • PhotoKing

    > 24 hour

    They seem to work. Hard to test it. You have to take the Z rods out all the way to get it to go in. But thats a good time to clean them. The fitting is very loose at first and the screws are very hard to turn. I thought I was going to strip it. Then finally it turned and tightened. I thought I had the wrong size at first.

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