Posted by Rick Denney on January 06, 2004 at 16:45:01:
In Reply to: Re: Re: Re: Re: Miraphone thumbring opinions posted by C(G) on January 06, 2004 at 15:41:03:
Dang, I need new glasses.
I caution against the teeth idea. No matter where you cut the teeth or how small, they will be just at the wrong angle to feel right. Better is to provide a sufficient bearing surface so friction is enough. A ring with a milled flat section half an inch in diameter would accept a quarter-inch hole and a quarter-inch Allen-head bolt. That could bolt to a brass boss with the appropriate hole and threads cut into it, which is then hard-soldered to the mounting flange. You'd be able to tighten it with the Allen key, and the half-inch-diameter bearing surface would be enough to keep it in place. If that isn't enough, a star lock washer between the ring and the mounting boss would do the trick.
The tricky bit is milling the flat on the inside of the ring.
Rick "a guy with a lathe ought to be able to turn that project out easily enough, and if he does, maybe he could turn out two or three" Denney