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Originally Posted by indydieselnut /img/forum/go_quote.gif
A further revision of Tenzip's solution, if we really want to get silly about it, is an inner and outer collar with a set-screw. The outer collar is tapped and the inner collar just has a detent so that it lines up with the set screw. When tightened, the length of the inner collar applies tention to the rod evenly, without marring the rod surface.
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Where I used to work, we had pneumatic cylinders in an endurance testing rig, and had adjustable actuators on the shaft, secured by set screws. To keep from marring the shaft, we used little copper slugs under the end of the set screw. I believe that a piece of plastic would work for our purposes, as we're not trying to set it up for 10k high-speed operations without coming loose. (We used pretty big T-handle wrenches, and tightened them 'til they
squeaked.)
I like the idea of the sleeve within a collar, but I'm unsure how it would work to keep it in place. I may stop at the hardware store tonight to see what's what. I have a couple of ideas. The configuration I have in mind would also stop the cup from rotating 360 degrees, which would be a plus, in my book. You'd probably be able to get 300+ degrees, so you could lay them flat, and pick them up and put them on without adjustment. Stainless, of course. Nobody wants rusty Grados.
Any interest in these, Grado people? I'll post some pics later of what I have now, (kinda rough, I'm an IT guy, not a toolmaker) and if I can get a prototype thrown together, of what I have in mind. Once I have a rough prototype, I could get our machining department turn out a batch for me.
Cost would probably be a couple of bucks for materials+whatever a first class stamp is now to US addresses. I'm not looking to make money, but I don't want to be out of pocket, either. Mods, if this is inappropriate for whatever reason, please let me know.