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MushiSushi
08-08-04, 09:48 PM
isn't it amazing that O1 can cut O1? ..... I made a Sen today out of an off cut of O1 ..... water quenched, untempered ..... shaves unhardened O1
Colin KC
08-08-04, 10:03 PM
Hmmmm:rolleyes:;)
MushiSushi
08-08-04, 10:10 PM
Humour me Bat Boy ........ I'm having fun
PS_Bond
08-08-04, 10:23 PM
I've had no joy with my sen to date. Dunno if it is my technique or what...
MushiSushi
08-08-04, 10:27 PM
what I found was ... because of the size of the tool ..... f'narr ...... heating it to red wasn't enough ..... it had cooled too much by the time I got it to quench and wasn't cutting ..... it's a small tool ..... f'narr .......and must have lost the heat ..... so I took it a bit hotter and it is cutting fine
Roger Gregory
08-08-04, 10:36 PM
Simon, show us your tool :censored:

Roger
PS_Bond
08-08-04, 10:41 PM
OK... As far as I know, a sen is basically a drawknife with a 70-80 degree cutting edge, full hardened and not drawn.

Anyone got any elaborations on that? Like is it supposed to be used bevel up or down?
MushiSushi
08-08-04, 10:41 PM
dirty old man :p
PS_Bond
08-08-04, 10:45 PM
Et tu, Brute...
MushiSushi
08-08-04, 10:45 PM
I made mine for cutting in a Bo-hi ..... it's about a 75 degree edge ... pulled towards me with the flat side facing me ..... it's just an off cut of O1 ... with a copper guide .. it's damn hard because I was able to drill a hole about 1 and a half inch from the cutting edge with a cobalt bit, but I tried drilling half an inch down from that and the bit was just skating