they are trying their best to ignore my experience and the
experience of about 10 others (approx) that Marples chisels
don't hold an edge. What's to "reason". It's just facts
they don't want to face.
Alan Bierbaum wrote:
Just in case there is anyone reading this thread for any reason
other than "entertainment value", I would recommend that you do a Google
groups advanced search of the wreck on the phrase "blue chips". Add a
qualifier like "value" or "bargain" to limit the search if needed.
I'm sure you'll find that these chisels have been widely-regarded as
a good value. Not great, but decent, and worth the money.
It is certainly possible that the newer ones are suffering from QC
issues, but I don't think it's wise to dismiss the experiences of *many*
knowledgeable wooddorkers (certainly a heckuva lot more than 10) just
because Dave says it's so.
FWIW, even the folks who said that Blue Chips are a good value
warned that you still have to be aware of the possibility of getting a
bad one in the bunch.
Alan, with all due respect, reasoning with BAD is akin to reasoning
with a brand new baseball sitting on a tee, with the outfield fence
just a few feet shy of 200'. Reasoning would be inappropriate. So,
ya limber up a little bit, take a slightly uppercut swing and watch it
sail out of the tiny park. Not very challenging, but somewhat
satisfying as you put your gear away and go do something productive.
obww - allowing one's shellac top-coat to dry that extra week or so
makes rubbing-out a ridiculously easy experience, as the shellac has
thoroughly hardened, and still cuts easily with whatever abrasive it
is you've chosen.
These chisels will be all but impossible to flatten properly. If they
were slightly concave across the chisel width they'd okay, but convex
down it's length is not good. If you decided to use them anyway they'd
be impossible to use well in most chiseling operations where a flat
back is necessary for a straight cut.
On 6 Apr 2004 11:35:43 -0700, email@example.com (Daniel) wrote:
Layne, Daniel, et al.,
It's my understanding that, although a flat chisel back is optimal, a
slightly convex shape down the length is acceptable. Concave along
its length is absolutely no good. 1mm along the length of a Blue Chip
doesn't seem too outrageous since they have relatively long blades.
Only try to polish the business end of the back and they should work
fine. Just my opinion.
Imagine you're paring a bit of wood off of the wall of a mortise. The
back of the chisel serves to keep the edge of the chisel cutting along
a single plane. The benefit of a flat back should be apparent. If
the back has a concave curve along its length, the edge will tend to
dig in rather than maintain a flat cut. If the back has a convex
curve, the edge will tend to come out of the cut. This can be
compensated for by slightly adjusting the angle of the chisel relative
to the wood, but I don't think you can compensate for the concave
situation. I could be missing something here so please fill me in if
you have a different conclusion.
+ + +
It seems to me that having a slipping chisel (convex), shooting off to
wherever, is worse than a chisel digging in (concave). In both cases you
will have to correct and orient the chisel by feel, but I'd say that a
chisel that tends to dig in is safer and and easier to correct than a chisel
that loses its grip?
Japanese chisels typically are hollowed on the back, either ground or
hammered. The back is then flattened so that there is a flat surrounding
the hollow. I've read that this is for easier flattening in the future as
the chisel is sharpened (and thus shortened), and for less friction during
use. After many flattenings the back may need to be rehollowed with a
"If I knew what I was doing, I wouldn't be here"
don't blame yourself. Blame Chuck (Conan) for his utter
lack of self control. He even admitted he went into bait
mode; all because he and I aren't exactly the best of buds. :)
Thanks, Jim. What's sad is that I really was going to avoid the
urge to slap Dave around a little until he posted the following:
> the tide seems to be turning against Marples lately. did I lead the
> (In my humble, highly unqualified, seldom respected newbie opinion,
> the Marples are tres substandard, due to the softness of the metal
> they are currently using; just like the Buck I tried for grins.)
The sheer hubris (look it up, Dave) of it was more than I could stand.
FWIW, my comments about using the chisels this past week were
absolutely true. But I had decided I would not post any more of my own
experiences with them, since it serves no purpose. I had even resisted
the urge to address his comments about "wreck idiots" (i.e., folks who
disagree with him, and/or have more knowledge or experience than him).
But when he posted that load above ... well, I just lost it. :-)
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