There a lot of good information posted here that I wasn’t aware of. Learned something. I did some research on line and found that most CBN grinding wheels made in the USA are for aerospace of manufacturing applications. And some CBN wheels sole by some USA businesses are made in china to their specifications. Let me know if I’m wrong. 

I’m sorry Moke and WoodGuy that you had bad experiences with those Wiley nephews. Seems when you didn’t pay for it or earn it’s easer to blow or wreck. 

James McIntyre