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touch hole drilling
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Topic: touch hole drilling (Read 1465 times)
2 shots
Full Member
Posts: 208
touch hole drilling
«
on:
November 22, 2023, 02:48:15 AM »
hi all, since i cant seem to find a 1/16 short [ center] bit how do you drill your vent holes [without a liner] im getting lots of flex even with a very light touch. any thoughts or ideas? thanks. mike
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Eric Kettenburg
Hero Member
Posts: 4179
Re: touch hole drilling
«
Reply #1 on:
November 22, 2023, 03:18:23 AM »
Can't you just choke the bit up inside the chuck? I've always just used standard length bits, never had a problem provided you have a sharp center punch.
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Strange women lying in ponds, distributing swords, is no basis for a system of government!
rich pierce
Administrator
Hero Member
Posts: 19575
Re: touch hole drilling
«
Reply #2 on:
November 22, 2023, 03:36:58 AM »
Might be you need a new drill bit? I’ve center punched and drilled it without issue in the past, then followed with internal coning.
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Andover, Vermont
Bill Raby
Hero Member
Posts: 1553
Re: touch hole drilling
«
Reply #3 on:
November 22, 2023, 05:54:36 AM »
Start with a center drill smaller than 1/16 inch. Don't really matter much what size it is as long as it is smaller. Once you have that, go with a normal 1/16 inch drill bit. cut it shorter if you feel like it.
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2 shots
Full Member
Posts: 208
Re: touch hole drilling
«
Reply #4 on:
November 22, 2023, 06:49:57 AM »
hi bill, cant seem to find a smaller center bit .. any ideas? thanks. mike
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Bill Raby
Hero Member
Posts: 1553
Re: touch hole drilling
«
Reply #5 on:
November 22, 2023, 01:05:50 PM »
https://www.mscdirect.com/product/details/69318624
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Bill Raby
Hero Member
Posts: 1553
Re: touch hole drilling
«
Reply #6 on:
November 22, 2023, 01:12:20 PM »
Most sets will have sizes smaller than 1/16 inch. Trade size #1 is .0468 inch.
https://www.mscdirect.com/browse/tn/Holemaking/Center-Drills-Combination-Drill-Countersinks-Spotting-Drills/Center-Drills/Combination-Drill-Countersink-Sets?navid=2106135
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bluenoser
Hero Member
Posts: 863
Re: touch hole drilling
«
Reply #7 on:
November 22, 2023, 04:31:30 PM »
You can also use a slightly larger center drill by just using the tip. You only need to make an indent large enough to keep your 1/16" drill from walking.
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Pukka Bundook
Hero Member
Posts: 3495
Re: touch hole drilling
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Reply #8 on:
November 22, 2023, 04:49:41 PM »
Just centre punch and drill with a 5/64", 2 shots.
Actually if you must use a 1/16" drill, a larger centre bit won't hurt. just use it lightly and it will take the sharp corner off the 1/16" hole. gives the flash a better lead in to the barrel.
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2 shots
Full Member
Posts: 208
Re: touch hole drilling
«
Reply #9 on:
November 22, 2023, 05:15:55 PM »
thanks all, was wanting to use the center bit to drill and counter sink at the same time. thanks Bill for the link. mike
«
Last Edit: November 22, 2023, 05:23:17 PM by 2 shots
»
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Scota4570
Hero Member
Posts: 2409
Re: touch hole drilling
«
Reply #10 on:
November 22, 2023, 07:30:44 PM »
Use a drill press. Mark the center. Secure the part. Use a light touch and oil. I would never try to freehand it, I'd break the bit for sure.
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2 shots
Full Member
Posts: 208
Re: touch hole drilling
«
Reply #11 on:
November 22, 2023, 07:53:06 PM »
yes im using a press. i chucked up the bit a little and will try again.
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Daryl
Hero Member
Posts: 15887
Re: touch hole drilling
«
Reply #12 on:
November 22, 2023, 09:38:26 PM »
Perhaps practice on another piece of steel first. Practice until you get it right.
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Daryl
"a gun without hammers is like a spaniel without ears" King George V
P.W.Berkuta
Hero Member
Posts: 2221
Re: touch hole drilling
«
Reply #13 on:
November 22, 2023, 10:48:45 PM »
It would be VERY EASY to break off that small diameter portion of a center drill if you are not careful - and not using a drill press. You might want to use a spotting drill instead.
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"The person who says it cannot be done should not interrupt the person who is doing it." - Chinese proverb
Dphariss
Hero Member
Posts: 9922
Kill a Commie for your Mommy
Re: touch hole drilling
«
Reply #14 on:
November 22, 2023, 11:13:41 PM »
Dull drill?
MSCdirect dot com can furnish center drills of almost any size as will others but msd will get it to you faster.
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He who dares not offend cannot be honest. Thomas Paine
2 shots
Full Member
Posts: 208
Re: touch hole drilling
«
Reply #15 on:
November 22, 2023, 11:59:34 PM »
thanks all got it done
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touch hole drilling