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Old 08-05-2009, 12:14 AM   #1
bass-a-roo
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Jun 2009
San Francisco
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i'm having a lot more trouble drilling through my keg than i had thought i would. I borrowed a 7/8inch unibit (step drill bit) and am using a slow speed and plenty of lubricating oil. How long should it take me to get the right size hole? i drilled a pilot hole through the wall of the keg with a smaller regular drill bit, and now i'm trying to get the unibit to make even the smallest sized hole it can drill but 30 mins of drilling (off and on) i seem to be getting nowhere. Is this normal? how long did it take you to drill through your keg?

ALSO: i'm using a 7.2 volt cordless drill if that makes a difference. (I didn't think it does because i'm supposed to use a slow speed i believe)



 
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Old 08-05-2009, 12:25 AM   #2
chuggs
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Jul 2009
Jupiter, FL
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I used a 1/2" drill with enough torque to almost snap my wrist when the high speed bit catches on the metal. I used a high speed carbide tipped drill bit. It didn't take very long...but it will catch once you get close to going through all the way.

If I do it again...I'll use a step bit.



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Oopps...if I read your post carefully...I see you're already doing that. The only thing I can think of is that the bit your using might be worn down from a previous use. If it's sharp...it should cut it..a little at a time.

Good luck...and be carefull if you get a high torque drill...it can put a hurtin' on ya.




 
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Old 08-05-2009, 12:41 AM   #3
DarkSide
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Feb 2009
Barrie, Ontario
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I used a 7/8 step drill bit as well. I was worried it wold be a problem, but it took me only 5 minutes to drill the hole. I used lubricant too. I started off slow, with a lot of pressure. As the hole got bigger I increased the speed. Every time I stopped I put a little lubricant on the drill bit. After I lubricated the bit, instead of applying a constant pressure I kind of rocked it where I put pressure, release, pressure, release. If the bit got stuck, more lubricant, repeat.

Now I used an 18V Drill, so your 7.2V may not be enough. Also I did not go all the way to the top of the bit, the 7/8 mark. As I got closer to the right size hole, I would stop and check the size with my 1/2 inch nipple. So when it had enough room to wiggle through, I stopped.

Check out this link to the HomeBrewTalk Wiki and read hole cutting:

http://www.homebrewtalk.com/wiki/index.php/Keggle#Hole_Cutting

 
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Old 08-05-2009, 12:43 AM   #4
BA_from_GA
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Feb 2009
Buford, GA
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i drill all kinds of metal with unibits at work almost every day. High speed is good. If your bit's going that slow, you probably borrowed an incredibly dull bit. just today i had a well used bit cut right into 1/2 in angle iron, and kept right on going till it hit the dull step, then it didn't go any further, changed to a sharper bit, cut right on through.
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Old 08-05-2009, 01:10 AM   #5
gmarcek
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Jul 2008
Houston TX
Posts: 20

a knockout punch makes this job a little bit easier and will leave a clean hole.
Punch,Knockout,Round,7/8 In - Knockout-Hole Punches - Electrical Tools - Hand Tools : Grainger Industrial Supply

 
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Old 08-05-2009, 01:17 AM   #6
Synovia
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Jan 2009
Chicago, Il
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Quote:
Originally Posted by bass-a-roo View Post
i'm having a lot more trouble drilling through my keg than i had thought i would. I borrowed a 7/8inch unibit (step drill bit) and am using a slow speed and plenty of lubricating oil. How long should it take me to get the right size hole? i drilled a pilot hole through the wall of the keg with a smaller regular drill bit, and now i'm trying to get the unibit to make even the smallest sized hole it can drill but 30 mins of drilling (off and on) i seem to be getting nowhere. Is this normal? how long did it take you to drill through your keg?

ALSO: i'm using a 7.2 volt cordless drill if that makes a difference. (I didn't think it does because i'm supposed to use a slow speed i believe)
At 7.2V, its more of a screwdriver than a drill.


Every man needs a real drill, IMO. I <3 my milwaukee M18 cordless.

 
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Old 08-05-2009, 01:28 AM   #7
Bacon_grease
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Jul 2009
Houston, TX
Posts: 6

Quote:
Originally Posted by bass-a-roo View Post
i'm having a lot more trouble drilling through my keg than i had thought i would. I borrowed a 7/8inch unibit (step drill bit) and am using a slow speed and plenty of lubricating oil. How long should it take me to get the right size hole? i drilled a pilot hole through the wall of the keg with a smaller regular drill bit, and now i'm trying to get the unibit to make even the smallest sized hole it can drill but 30 mins of drilling (off and on) i seem to be getting nowhere. Is this normal? how long did it take you to drill through your keg?

ALSO: i'm using a 7.2 volt cordless drill if that makes a difference. (I didn't think it does because i'm supposed to use a slow speed i believe)
Perhaps someone here has a better way, but I used a cheap 3/4" hole saw bit. A quick ding with a center punch, plenty of cutting fluid and a small power drill and I was through in about sixty seconds.

I used a round file to enlarge the hole *just* enough so I could thread the coupling in. Perhaps 10 minutes getting that fitted up properly.

Then, another 5 minutes or so to get the fitting (I used a Weld-B-Gone type with two silicone gaskets and a locknut - and a layer of teflon tape) and it was done.

Including drinking, set up, drinking and clean up, it was about a 45 minute job.

 
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Old 08-05-2009, 01:30 AM   #8
pickles
 
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Feb 2008
Columbus
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you definately need a more powerful drill

 
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Old 08-05-2009, 01:36 AM   #9
Synovia
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Jan 2009
Chicago, Il
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are you sure you're not spinning the bit backwards? A weak drill should lag or stall, but it should still cut.

 
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Old 08-05-2009, 01:49 AM   #10
WIPbrewery
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Jul 2009
RI
Posts: 15

Quote:
Originally Posted by gmarcek View Post
a knockout punch makes this job a little bit easier and will leave a clean hole.
Punch,Knockout,Round,7/8 In - Knockout-Hole Punches - Electrical Tools - Hand Tools : Grainger Industrial Supply

yep, gotta 2nd this recomendation..heck of alot easier than drilling a 7/8" hole in stainless, lots faster and alot easier.



 
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