Scraping hard end grain with a negative rake scraper is 'in' these days
and a commercial tool, like night follows day, has predictably appeared
in our catalogs.

What is this all about, anyway? What is negative rake? Which is raked
negative, the long or short bevel? Which bevel is positioned up when
negative rake scraping? Is the arris on the front of my Viking hook
tool that prevents dig-ins a negative rake scraper? I guess you can't
have a scraper's edge without two surfaces (bevels) meeting somewhere.
Does their included angle determine rake? If I tilt the flat top
surface that completes my standard scraper's bevelled edge downward with
the handle upward and the edge kept above center inside and below center
outside do I have in effect a negative rake scraper? With a lantern
type tool holder I can change top rake on my metal lathe without
grinding the bit.

I'm probably just changing semantics instead of rakes; positive,
negative, neutral, relief, clearance, whatever. I'd sound even more
like I know what I'm saying if I could work in "proprioception",
"chatoyance" and "chiaroscuro" in an off-handed manner. I don't and I
can't.

I sure would appreciate it if some of you would waste some information
(empirical or scientific) on me and maybe a few others about scraping
with negative rake.


Turn to Safety, Arch
Fortiter



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