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Tool Time Let's talk shop. Equipment, Tips & Tricks, Safety issues - Post it here.

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  #1  
Old 06-23-2001, 11:51 PM
raven339
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Using Cobalt Drill Bits


I've been trying to drill a hole in a stainless steal butter knife with a cobalt drill bit using cutting oil to no effect.

I'm confused...I thought cobalt bits were designed for drilling in stainless steal and other hard metals?

I assume I'm missing something...

Thanks for any help or insight...

Thanks,

raven339
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  #2  
Old 06-24-2001, 04:37 AM
atbarr
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Using Cobalt Drill Bits


I've use a carbide spade drill. That works for me.

A.T. Barr
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  #3  
Old 06-24-2001, 06:31 AM
Don Cowles
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Cobalt bits will last longer than plain tool steel, but neither one was designed to drill through hardened steel. A.T. is right- you need carbide for that job.
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  #4  
Old 06-24-2001, 08:10 AM
Geno
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Either carbide drills, or spot anneal where you want the hole and drill it while it is red hot. The discoloration will buff off.
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  #5  
Old 06-25-2001, 12:04 AM
raven339
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Using Cobalt Drill Bits


Thanks,

It explains a lot!

raven339
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