Oversized jointer knives

[Maurice Arney]

I have a perfectly good set of four 8 inch jointer knives that are 13/16 inch wide/deep instead of the 3/4 inch specified for my jointer. I would like to use them but the issue is they are too high even when seated all they way into the cutter head. Yes, I could raise my outfeed table but then I could not use the knife setting tool that came with my machine. I know there are other methods for setting knife height, but I would like to be able to continue using the machine tool. Is it possible (or even advisable) to attempt to grind 1/16 inch off the butt of these knives? Has anyone tried this? Or is there another solution that I'm overlooking?

Thanks

Actually I would only need to take off about 1/32 inch and they could then be set with the machine jig.

[Andrew Hughes]

I would bring to my saw service guy and tell him to grind them. Keep them all in balance so they weigh the same

[Richard Coers]

Personally I would take them to a machine shop so all three knives can be ground at the same time. BUT, that may be half or more of the cost for another set of the correct knives.

[Maurice Arney]

Very good point about keeping them balanced. I hadn't thought about that. It may not be worth trying to use them.

[Warren Lake]

what is the projection when mounted in the head? Put a dial on the head and zero it rotate the head and what is the high number tip of the knife

[Bill Dufour]

Ue a diamond file or a abrasive disk in a angle grinder and cut a small nick in the cutting edge of each blade. make the nick the 1/16 deep. tell your sharpener to grind them down until the nick is gone on all three knives. Or just tell him to grind off the 1/16 extra.
Bill D

[Tom M King]

I have a set like that too, still in the plastic case for probably over 35 years.