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Old 03-06-2013, 04:36 PM   #1
dmcmillen
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I have 3 Firestone Challenger VI Corny kegs that use the short tapered plastic/nylon gas in tube. They are in pretty bad shape and I would like to drill out the IN post to accommodate a stainless steel dip tube.

Anyone have any experience doing this or have any recommendations or suggestions? It doesn't look like this would be a problem. Just need to use a bit that will handle the SS.

David

 
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Old 03-06-2013, 05:16 PM   #2
CoalCracker
 
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don't see a problem as long as you go slow and carefully. Don't oblong the hole at all. Keep it as close to round as possible.
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Old 03-06-2013, 05:18 PM   #3
Pratzie
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They say slow speed with steady pressure to keep the heat down is the best. I'd def use some drilling oil or ive even seen people say they use olive or canola oil. just enough to keep it moving and the temp low.
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Old 03-06-2013, 05:23 PM   #4
KaSaBiS
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I will add that my coworker snapped off a drill bit in his corny. so if your applying pressure, do so carefully. a Drill press would be gread vs a hand drill.
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Old 03-06-2013, 11:22 PM   #5
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Good machining practice is keep the drill slowwwwww, just turning fast enough to pull out a chip and not get too fast and work harden the material you are drilling. A ;ow speed 1/2 variable speed drill is a perfect tool for this if you have one. Otherwise 3/8 and a llot patience and caution will do.
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Old 03-07-2013, 12:15 AM   #6
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I had one of those, and drilled it out with no problem. Like the others have already said, slow and steady is the trick. I didn't use any oil though, but you really aren't cutting a lot. Just take your time and it'll work just fine.
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Old 03-07-2013, 03:26 AM   #7
JRems
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I have done the same as well. I will play devils advocate and say you don't need oil. When I drilled it with a recently sharpened cobalt bit, it wasn't even hot by the time it drilled through. Go slow! That I will recommend.
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Old 07-03-2013, 02:37 PM   #8
Jacktar
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What size bit did you use? I have the same problem. I have a ss tube but wondering I. I should just order plastic to keep it simple.

 
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Old 07-03-2013, 07:02 PM   #9
dmcmillen
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Jacktar, i was able to drill 3 kegs out and replace with ss tubes. It's been a while but i believe i used a 3/8 (just guessing and I will check), but i had to ream out the holes for the tubes to fit. It worked but it was a lot of effort to ream out after the initial drill. I really needed a 32nd larger. I would size my bit to an out post on a keg that already has a ss dip tube, which I believe I did, but it was still a little small. Of course, the trick with drilling ss is to go slow - low rpms and oil regularly.

 
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Old 07-03-2013, 09:16 PM   #10
Jacktar
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What kind of oil should I use?

 
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