I was thinking that if I annealed them I could forge the teeth on the rasp
cutting surfaces flat. I am concerned about cold shuts especially on the
rough sides big teeth if I do so. Maybe anneal, grind flat, then forge?
I'd love to find a use for these as I go through a ton of these each year.
I am not sure what type of steel is used for these rasps. Does anyone know
this as well?
Thanks!
George
They are also good for hot rasping steel.
You can give them away to any blacksmith, me included.
If you were going to use them for some other purpose, I'd recommend
grinding the teeth off. That way there's no cold shut problem. Many
machine tool scrapers are made this way.
Pete Stanaitis
Cheers
Trevor Jones
I have a two file wide shelf on the fron of my forge as a rest. Teeth
were hot flattened and the two tack welded together edge to edge. I
also hav ground a chisel-like point on the end of one, clamped it into
the tool post of my metal lathe and used it to cut a bowl shaped
depression in wood.
Ted
As I understand it, most cold rasps are *not* carbon steel, though they
may be case-hardened; certainly, the ones I've recycled haven't taken
any hardness on quenching. I've made a couple of 'hawks out of worn-out
old (maybe a century old) rasps; they were pleasantly easy to weld, and
the pattern of the hammered-in rasp teeth is rather attractive.
I cut out the blank with a plasma cutter, forge/grind to shape, quench
in oil, temper in the oven @ 400º for an hour. With grinding, the
rasp/file patterns fade into the edge and give the blade a unique look.
--
Tom Stovall, CJF
Farrier & Blacksmith
sto...@wt.net
http://www.katyforge.com