Huge problem involving invincible materials

Ok I'm making a few projects and the cutoff for one of them (the bottom end of a bullet shell casing) is a perfect piece in the puzzle for another, i need a hole drill through it, so I got the drill of doom out and the apparent uber go through anything drill bits and the metal ones, I went to drill in to the bottom of this using the firing pin impression as a starter guide (it was dead centre) And at first I thought this was all going smoothly, and as I spun the drill up to full speed there was plenty of metal shavings coming out, I stopped for a look because a bit of distance had went by and there was a tiny dent in the subject, the drill bit however was noticeably shorter than before... the same bits as the ones we use for drilling out flint tubes in antique lighters, they're tough (it was bigger bit in this case but same type) so I tried the bog standard metal work bit it made no difference to the hole and was shredded away similarly. First of all what the hell is that striker made of and second of all what the hell drill bit can get through it, I knew they were tough, I couldn't be assed cutting one with just a hacksaw blade so i did it with the drill as a lathe...

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Shell casings are generally made either of steel or brass, the anvil is formed during the forming of the case, so it's of the same material. The anvil is work hardened during forming so you can anneal it with a blow torch. If it's a brass case heat it until it changes color and let cool, if steel heat it until it starts to glow and let cool. If it's a brass cartridge you can also resharpen your drill bit with a zero rake angle to help keep the drillbit ffom grabbing when you do get through.
as I spun the drill up to full speed

Adding to the above--drill slowly in metal (and add a bit of lubricant.)
Goodhart gmoon9 years ago
agreed. But if the bit spiraled off shavings in the same manner as the hole were being cut, then the bit itself might have been used too often on metal without proper cooling/lubrication, i.e. it might have been softer then it should have been. *shrug*
killerjackalope (author)  Goodhart9 years ago
i suppose it could have been during some work done with it, I think I may have done enough to knock the pin out, after that there's two holes that wile suffice also working on drill powered lathe, got some stuff ready for that, but the frame is complicated, I would use wood but that wouldn't live all that long for the frame design, unless I use the bench as a mounting frame...
:-) I still have one of these in the back room somewhere: And I think I have seen a cheapo version of something they sell that holds a hand drill in place with a set of gears to lower it like a regular drill press (the one in the picture descends very VERY slowly)
That's awesome goodheart, I'll give you ten bucks for it, and I'll tell you what I'm gonna do, I'll even let you pay shipping because I like your face.
Your handcranked drill press, I was making an offer.
Oh I see. Well that one in the picture is not mine. I never took a picture of mine (it's not painted like that one is, and I don't even know how much I paid for it years ago at an auction). The postage for that mass of iron would be substantial :-)
I had a old 'smithy's "axial" sledge years ago too. Back when I could swing a 24 lb sledge over my head a few times. LOL
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