Hey br5495
Any luck with MACOR?
I read that Machining Guide provided by zoiDman...out of my league for testing. Maybe I can find a local shop that can produce to spec?
I've messed with it a little bit, but haven't come up with a practical way to use it for a coil cup. For the time being I am giving it a lot of thought about how to make the best use of it. This stuff is too expensive to just start making a bunch of trial and error prototypes.
It's some real funny stuff to work with. It looks and feels like white ceramic, but drills and machines on a lathe almost like a hard chalk. No shavings or chips. The waste is more like powder. I get the feeling that it is made of powdered glass bonded together with a high temperature something or another. If so, I can see how it can dull high speed tool steel. It can stand a high temperature, though. The surface can be torched to a bright red glow without any visible damage.
The greatest problem for my use is that the wall of the cup breaks too easy. A thicker wall is the obvious solution, but then the ID of the cup would be smaller. If I do that, then I may as well go back to the original ceramic cup. Either that or buy a larger diameter MACOR rod, dammit.
Another problem is that I cannot press a metal air tube into it. It has no give and breaks easier than ceramic or glass. I can get around this without resorting to an adhesive or heat shrink, but it is a hit or miss situation.
So here I am sipping from my Masterpiece and contemplating the vastness of the universe.