Reply by Mark Shymanski

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Posted on Need some help with chisels/sharpening

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Mark Shymanski

5621 posts in 3708 days

#1 posted 12-21-2008 04:00 PM

Your process sounds good. Take a look at the cutting edge using a magnifying lens, does the edge look uniform or can you see sections that are wider than others. If that is the case it is probably the pitting mentioned above, you can go back to a coarser grit and try to sand through it or you may need to find a slow speed grinder and re grind the edge beyond the pitting.

The other thing to be mindful of is holding a constant angle (the jig should help here) it is difficult to hold the tool at a consistant angle and even a small change will ‘round’ your cutting edge.

One more thing to be mindful of is that some really poorly made chisels are too soft to take an edge that is useful, and maybe the tempering that Mike mentioned will allow you to keep an edge on it. It would be interesting to try tempering the tool and seeing how the sharpening is affected. Just make sure you have good clean (unpitted) steel (close to the cutting edge) to temper so that you can sharpen steel and not rusted pits.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

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