I have several CBN wheels on grinders and a 600 grit CBN on a Tormek. I use the Tormek for all my spindle gouges but even the 600 grit didn't give me the edge I got with the stone water wheel.
Today I got a 1200 grit CBN for the Tormek and gave it a try. Much closer to what I like to see! I got a much finer grind than with the 600. If, as Reed Grey indicates, it will stabilize after a break-in period it might get even smoother.
I would certainly not try to reshape a tool with such a fine wheel unless I had a few days to spend. But resharpening the primary bevel on a Thompson 3/8" spindle gouge only took about 10 seconds. (I keep a jig set for just these gouges.) I sharpened a small scraper too with good results. I'll try a skew and a few other tools tomorrow, perhaps.
This wheel came from Ken Rizza at Woodturners Wonders. It's aluminum, 10" dia, 2" wide, 1" flat down the sides, and 90-deg corners on the edges.
Anyone else using a 1200 grit CBN? Ken said he doesn't sell many - one went to a guy sharpening scalpels.
JKJ