chancrescolex wrote:Here is a solution that I'm going to be testing out tonight that is the same basic principle as the well nut. The only difference is that it will be about half the height of the well nut.
I'll be using a 3/8 x 7/8 x 1/16 rubber washer against the bed with a 5/16-18 Keps Nut tightened down onto it. The toothed washer on the nut should prevent it from rotating against the rubber washer, and the rubber washer should grip the bed well enough to not slip.
Ideally, I would have liked to use a serrated flange lock nut, but they didn't have any at Lowes.
If you're talking about a 1/16" thick washer, as the compression zone, that's not going to do anything for you.
The well nut has a thread piece inside it, but most of the length of it is just a rubber tube that is flexible and compressible. It's that compression in the rubber that you're looking for. One end presses against the bed pushing it down, the other end (which has the thread piece pushes upward. So it's like having to nuts with a spring between them. The pressure in both directions takes up al the vertical play/slop.
You want something that gives you some control over the compression. You don't want it too loose or you get vertical play/slop, and you don't want it too tight, which puts so much pressure/friction that the metal threads of the rod and the nuts would bind, or wear out prematurely.
Also, once adjusted to the desired compression level, the nut shouldn't be allowed to rotate.
In your case, it might work, if your "washer" was thicker and more compressible. Perhaps a piece of rubber tubing. And trust me when I tell you that the nut will rotate. Little by little, but it will. Your best bet is to come up with some kind of block or pin or something that you can put between those sprockets, to prevent rotation.
To print or, 3D print, that is the question...
SD3 printer w/too many mods, Printrbot Simple Maker Ed., FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.