Fascinating question for those of us with bits needing fettling.  

how about drilling a bit size hole in a scrap offcut at the correct grinding
angle - then just insert bit - register it using the notch, and rub back and
forth on the stone?  It’s hard to maintain an angle for something that small.
Same idea - different set up to provide registration on a hand crank, if you
want to salvage a broken bit.


Richard Wilson
Yorkshireman Galoot
retired in Northumberland