What Size Drill Bit? - Overclock.net

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post #1 of 12 Old 04-11-2006, 04:15 PM - Thread Starter
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Okay, one for all you machinists out there, what size drill bit do I need to get for a #10-32 * 1/2" bolt? It's gotta be able to drill through aluminum, and possibly if it's available thru Home Depot.

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post #2 of 12 Old 04-11-2006, 04:16 PM
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Here ya go its all you'll ever need. and the bits can be bought at any harware.

If you're not tapping it I'd go the next size up for enough free play to be able to get all bolts in.
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post #3 of 12 Old 04-11-2006, 04:19 PM - Thread Starter
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Nice, do you know what diameter drill bit I need though?

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Originally Posted by CyberDruid
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post #4 of 12 Old 04-11-2006, 04:21 PM
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Quote:
Originally Posted by Burn
Nice, do you know what diameter drill bit I need though?
If your not tapping the hole, then just slightly larger than the bolt diameter.

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post #5 of 12 Old 04-11-2006, 04:22 PM
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Quote:
Originally Posted by Burn
Nice, do you know what diameter drill bit I need though?
Bits that small are numbered or lettered so I'd say just compare the bit to the bolt,It calls for a #21 bit if you're tapping the holes.

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post #6 of 12 Old 04-11-2006, 04:23 PM - Thread Starter
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Yeah, it's not going to be tapped. I tried with 3/16 and a 1/4 bits, but the 3/16 was too small and the 1/4 was too big...Any suggestions on what size bit between?

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Originally Posted by CyberDruid
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We cannot change the cards we are dealt, just how we play the hand.
--Randy Pausch
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post #7 of 12 Old 04-11-2006, 04:26 PM
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Try a 7\\32 or a 15\\64 the are the only 2 bits between a 3\\16 and 1\\4 that aren't numbered or lettered.

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post #8 of 12 Old 04-11-2006, 04:28 PM - Thread Starter
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Okay, I'll give that a shot. Thanks a bunch!

My CNC Mill Project
Quote:
Originally Posted by CyberDruid
Burn + Electricty + Water =
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We cannot change the cards we are dealt, just how we play the hand.
--Randy Pausch
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post #9 of 12 Old 04-11-2006, 05:02 PM - Thread Starter
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It seems that 7/32 is too big by just a bit...Anything minutely smaller?

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Quote:
Originally Posted by CyberDruid
Burn + Electricty + Water =
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We cannot change the cards we are dealt, just how we play the hand.
--Randy Pausch
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post #10 of 12 Old 04-11-2006, 06:10 PM
 
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try a different screw size...

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