Trouble flattening back of chisel
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- This topic has 5 replies, 4 voices, and was last updated 8 years, 3 months ago by Matt McGrane.
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7 February 2016 at 12:20 am #134581
Hi folks. I just picked up a new set of Narex chisels and some of the DMT Dia-Sharp diamond plates and have been trying to flatten out the back of the 20mm. I’ve been working on the extra coarse plate for a long time and I’ve got a pretty good shine on much of it, but a section near the tip doesn’t seem to make contact very often. I drew grid lines and see wear immediately near the end of the chisel and further down the neck, but there’s a gap that takes a very long time to go away. Once it does, I draw a new grid to confirm that I don’t have hot spots, but then the process repeats itself. Any idea what I could be doing wrong?
I know Paul suggests using abrasive paper on a glass plate or other flat surface before moving to diamond plates, but the description of the product on the DMT FAQ says that the extra coarse stone is commonly used to flatten chisels so I figured it might be ok.
7 February 2016 at 1:32 am #134584The extra coarse is 220. Turns out it was my technique that was poor. I wasn’t spending enough time on the nose (in comparison to the rest) though I thought the whole thing had pretty good contact.
Anyway, I watched this video and imitated his movements and now my chisel is nice and shiny.
7 February 2016 at 4:04 pm #134594I press the chisel down with my fingers and moved it side to side—usually I try to press it down harder and maintain same moving direction while I’m flattening the back.
7 February 2016 at 10:28 pm #134618Kevin – one thing to consider is that you really only need to flatten the end of the chisel, maybe only the last inch or so. If you do, it’ll take years to wear the chisel down to a point where you need to flatten further back. It looks like you flattened several inches and that’s not really necessary.
Anyway, glad you got it flat.
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