Thread: What is the highest grit you have used on a stone?

Originally Posted by nun2sharp

I watched Sham run his diamonds down the drain while lapping a Charnley.

Lapping my CF was what turned my DMT from an aggressive cutter to a well worn in stone! It went from 325 grit to about 600 in that one session.

But yes, I use a 325 DMT for all my lapping and it works great. No need to go any higher than that IMHO.