sharpening chisel grind

Mike Quesenberry

Mike Quesenberry

Joined
Jun 2, 2009
Messages
1,564
Recently I had a friend ask me to sharpen his blades for his ice shaving machines. He has one of those carts you see at fairs that sell shaved ice as well as smoothies and foo foo coffee drinks. I tell him sure I can sharpen anything as long as it's made out of good steel. This blade is about 2" wide and 1/4 " thick. He brought me a brand new blade to show me how sharp they come out of the box. It has a primary grind and a very fine secondary grind and it was very sharp. I have a sharpening fixture that holds Japanese water stones in various grits. After matching the angle on the new blade I start in on the old ones working my way up in grits. After stropping it still wasn't razor sharp. Should I surface grind on the back side( flat side ). I'm not sure. Any help would be appreciated.

Thanks,
Mike Quesenberry
ABS Journeyman
www.quesenberryknives.com
 
After doing the bevel on a Japanese grind ( chisel grind), I place the flat side on a large diamond plate, or on a surface plate with a wet-or-dry sheet on it. 220 grit is usually what I use. Lap the back just enough to remove the wire from the other side. That should make the edge super sharp.

Stacy
 
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