|Forum topic by nerdbot||posted 03-29-2015 09:17 PM||914 views||0 times favorited||6 replies|
03-29-2015 09:17 PM
I have a couple cheap sets of bench chisels (HF and Craftsman). I had previously sharpened the HF set with my sandpaper setup – lapped the backs and honed by hand (because the cheap honing guide I had didn’t hold the chisels very well, even after I did the modifications suggested in the Lie-Nielsen Youtube video). I was actually surprised how well the HF set worked when sharpened, but it took so long for me to do the 5 HF chisel set that I held off on tuning up the Craftsman chisels, and just got back to making sawdust.
I just recently upgraded my sharpening setup from granite slab and sandpaper to a Veritas MKII and DMT diasharp diamond stones – the Extra Coarse, Fine, Extra Fine, and Extra Extra Fine set. I decided now was a good time to do the initial tune up on the Craftsman chisels, as well as regrind the bevel on the HF set to fit one of the settings on the MKII guide. I also sharpened 3 plane blades.
The tools sharpened fine, but what I noticed was that I was getting some pretty deep scratches in the stones themselves. I’ve read that these diamond stones require a small break in period, and also require a light touch. So, I’m not sure if either of those are the case here. I don’t think I was pressing down too hard, but I did apply about the same pressure as I did when I used sandpaper. I’ve attached pictures of the Extra Coarse, Fine, and Extra Extra Fine stones as those are the ones with the most pronounced scratching. So is this normal, am I doing something wrong, or should I contact DMT? Thanks!
Extra Extra Fine: