I am setting up a sharpening station, and I enjoy getting advice about
Could some people explain why they prefer either hollow grinding before
honing, or relying entirely on flat abrasives.
Thank you in advance.
I've heard hollow grinding on lathe tools allows the chip relief you need
for proper cutting, and also allows you to quickly tune up an edge, since
it's like putting a micro bevel on a plane -- you have a lot less metal to
remove at the cutting edge to make it sharp. I hollow grind my skews, but
don't really notice much difference in operation between a perfectly flat
edge and a hollow ground edge. Get a little belly on it tho, and
watchout... you'll mess some stuff up that way. Not sure why, since I'm not
an expert turner by any means.
No, I meant on a skew, where your normal edge looks like \/ and instead, you
sharpen it to have a slight roundedness because you did it by hand, and
couldn't keep it totally flat, or you did it on a slack belt or a buffing
wheel.. It seems like if it's that way, it either skates or digs in when you
don't want it to.
The edge is only hollow ground when it's damaged, such as after being
dropped, or about every 15 or so honings.
My experience is that I'm not hollow grinding any more often than I
would have hit the 220 grit stone, so it's not a big deal. An
acquaintance of mine who uses his chisels to make a living has had the
same ones since 1982. <G>
You guys who say that are really splitting hairs.
I don't have a problem with hollow grinding per se, but I hate my bench
grinder for so many, many reasons. It's just not a good way to sharpen
anything, even with fancy high dollar wheels on it.
Flat grinding is slow and tedious, but it delivers excellent results. I
think if I were going to step up to a powered system, I'd go with something
like the Veritas power sharpener deal and keep flat grinding. Wheels just
seem like such a PITA overall, even if I had a slow grinder and a good tool
Michael McIntyre ---- Silvan < firstname.lastname@example.org>
Linux fanatic, and certified Geek; registered Linux user #243621
I think they both have their place. For shaping and reshaping the
initial bevel, a wheel seems best. A large grit and slow speed wheel
can make quick work of an otherwise (somewhat) time consuming task.
After the inital hollow grind though, I gotta figure that an efficient
workstation with a good set of well-maintained stones is the best and
quickest way to go.
I envision a full set of Shapton Stones all in a row, covered by a
tilt- up glass dust exclosure, just waiting for a spritz of water and
a skilled hand to put the appropriate edge to the appropriate tool....
In search of a rabbi.
:I am setting up a sharpening station, and I enjoy getting advice about
: different methods.
: Could some people explain why they prefer either hollow grinding before
: honing, or relying entirely on flat abrasives.
Try my web site - Sharpening Notes - Hollow Grinding, Good or Bad.
: Thank you in advance.
You're welcome (in advance).
Jeff Gorman, West Yorkshire, UK
Email: username is amgron
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