Tuning a new set of chisels ….
OK, questions RE: getting a set of Marples Blue Chip bench chisels into shape –
I’m using two grits of diamond (DMT blue and red) ‘stones’ and a King #1 water stone to work backs of these guys to flat. I started out using the side of the Tormek stone (as they recommend) but found that it left too many deep scratches that were virtually impossible to remove … totally.
Both the diamond stones and the water stones were given to me by friend. Neither of the DMT stones has any indication of grit size. I have to assume from the feel of the ‘bite’ that the blue one is the coarser. The red one produces a finer scratch pattern. Would like to know if I’m reading these right.
What I’m finding is if I work the back of the chisel forth and back along the length of any one of these surfaces to the point where I have a perfectly even scratch pattern, then turn to tool around and do the same on the other side, I end up seeing humps and/or valleys by way of reading the scratch pattern. Is this an indication that the diamond hones are worn … worn out? They still seem to cut pretty well. Or, on the other hand, am I being overly anal about such things?
The King stone is marvelous! There is a little block of what looks like the same material as the stone itself which I assume is used to work up the slurry for polishing. It also seems to help keep the stone flat. Is this the proper use for that item?
Included with the stuff this friend gave me is a much coarser, grey waterstone. Since I don’t speak Japanese I can’t offer any info as to type, mfr., etc. It was badly dished from lack of maintenance. Not knowing what else to use I used the blue DMT diamond hone to get it pretty flat. Is there a better way …. coarse sand paper on glass perhaps?
Lastly, not a question about sharpening or stones so much as a comment RE: customer service –
I bought these chisels from the Seattle Woodcraft store. The 3/4″ tool was missground on the back right corner …. sorely rounded over. Sent the tool back and received a replacement within three days!
The customary blue plastic Marbles handle now says Irwin! Irwin bought Marples is what the store guy tells me. Blade still says “Made in Sheffield England”, though. I can attest for the hardness of the steel. Spent the last two hours polishing the back of that puppy and I’m not done yet. Very deep machine marks in this and a couple others.
Anyway … as the first set of real bench chisels I’ve ever owned, I’m working very hard to get them well tuned. It was amazing once I got the 1-1/4″ chisel polished, sharpened and honed to take a piece of ash and slice end grain so easily.
Happiness is ….. well tuned tools!
From Beautiful Skagit Co. Wa.