carbon tool steel,or files are much easier than HSS to drill.
I found that I had to touch up the edge of the masonry bit with a diamond wheel every hole I made for the handle rivets. 050" thick,and made several kitchen knives out of them.
I got a bunch of SOLID HSS power hacksaw blades about. The hardest thing to drill with a masonry bit is HSS. Last edited by David Weaver 05-10-2011 at 11:16 AM. You really would be better off just getting the right irons for what you want to do. Steve's irons are probably low 60s in hardness in their hardened state (and they are very good irons, maybe the best I've seen in O1). I have never tried that, but it is an option - one that might be a little easier on a longer and thinner iron. You do have one other option, I guess (and this is just a guess), and that would be to put the business end of the iron in water to keep it cool and try to use a mapp torch to run the temper out of the spot you want to drill (or drill twice and file out into a slot). Even the hardened 1095 spring steel is very hard on HSS bits and I have to sharpen them every time I drill two holes, and the cuts are not that great - i've probably been just using the HSS bits to run the temper out of the 1095 until they will drill it. I've been able to drill 1095 with HSS bits, but never hardened O1 (never even tried, it's just too close in hardness). Order different irons and save those, that would be my first choice (and second, and.)
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