Carbide drill bits- which ones to get?

Joined
Nov 24, 1999
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I'm planning on customizing a spyderco delica 98 with cocobolo dymondwood scales, stainless liners, and maybe flat grinding the blade. If you read my HORSESH*T thread you know how its been going already.
And now I've run into a another hang up. Due to the fact that the knife was made in Seki City Japan, where they use that damned metric system, it has 3mm pins
frown.gif
I don't know where to buy them and would rather not wait another month for peices and parts to be mailed in from all over the world, so I'm hoping I can redrill the pivot hole to either 1/8" or 3/16". And then for the pin in the backspring I'll try and turn down a peice of brass rod using the wonderfully accurate method or chucking it up in my drill press and holding a good square sanding block against it. ( yeah, I'll have to stop and check it alot, but its still cheaper than a lathe)
So the blade is ATS55 and hardened to about RC60 I think. And I need a carbide drill bit.
I've heard that the solid bits are really fragile, and seeing as how the spindle isn't the tightest on my drill press I'm guessing I shouldn't get a solid bit, because it will probably shatter as soon as it touches the tang.Where can I find a carbide tipped bit? I've heard that cement bits are carbide tipped, would that work for one hole? And do you think that I would be better off removing as little material from the hole as possible(drilling to 1/8" ) or should I take more off so that the bit gets a more solid bight into the cut (3/16")?
Thanks for any help. Or if you have a different idea than me I'd like to hear that too.

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It'll feel better when it stops hurting.
 
Hey Matt, you might want to check out
http://www.mpcomponents.com/catalog/Hardware/dowels/416dowl1.asp
3mm is only .0069 inches smaller then a 1/8 pin, buying a 3mm HSS drill to punch a hole through your new liners and just polishing one of those pins down is probably a cheaper way to go
biggrin.gif

Probably an even better way to go is phone around to fastener places locally and see if there's any that sell SS dowel pins in bulk, then you could just pick up 2-3 instead of buying a whole box. Plus the 416 pins are a lot more wear resistant then brass, but still are soft enough you could tap them to make your pivot adjustable.

Hope that helps
smile.gif


Rich
 
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