Originally Posted by
Charles Guest
Create the radius freehand on a coarse oilstone and then grind in behind it (NOT all the way to the edge you created at the oilstone, leave a sliver for your fine media) if you want a hollow ground blade. You can scratch in the radius on the flat face with a carbide scriber and then work to it on the stones. Make a template. You're going to have to maintain that shape on stones anyway, might as well learn how to create it there in the first place. What you are describing might take ten minutes, tops. And you won't burn the steel.
There is never a need to grind to a feather edge. Once you understand this, and you'd be surprised how many people don't, then you'll have a real understanding of the process. And once you do understand it, there's no need for water-cooled wheels, special dry wheels that run cool, etc. A plain coarse grindstone is all you need. The one that came with your grinder will work just fine.