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erock2112
Joined: 22 Mar 2018 Posts: 18
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Link Posted: Tue Jul 03, 2018 1:29 pm Post subject: Drilling holes in kettles |
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Hey all, it's finally time for me to start installing heating elements in my kettles, and I'm getting nervous about it, having never drilled through stainless steel before. I have the recommended punches and step bit, but I'm having a hard time thinking through the actual mechanics of drilling through the kettle. I know Kal recommends a drill press, but I can't visualize how a benchtop drill press could have enough vertical or horizontal clearance to stabilize a 20-gallon kettle. I don't have the space for a floor standing drill press. Am I overthinking this? Is this easier than I'm imagining?
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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erock2112
Joined: 22 Mar 2018 Posts: 18
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Link Posted: Tue Jul 03, 2018 2:31 pm Post subject: |
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Ah, okay. I'd assumed that I saw a drill press in that photo. Thanks for the help!
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Tungsten
Joined: 06 Dec 2014 Posts: 318 Location: Buffalo, NY
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Link Posted: Wed Jul 04, 2018 7:00 pm Post subject: |
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The punches really do make it easy as long as you get the right size pilot hole in there. They turn out beautifully.
Just measure and measure again so you have enough clearance for your hole AND what you want to put through it!
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dp Brewing Company
Joined: 08 Jul 2013 Posts: 664 Location: Midwest
Drinking: Chocolate Taco, Raspberry Mango Cider, American X, Sandy Dunes
Working on: Nothing
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Link Posted: Thu Jul 05, 2018 5:22 pm Post subject: |
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Just make sure you talk your time and don't rush punching through the Stainless. It is much harder than standard iron metal.
_________________ Visit dp Brewing Company
Hangovers hurt....but good memories last forever!
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erock2112
Joined: 22 Mar 2018 Posts: 18
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Link Posted: Wed Jul 11, 2018 12:31 pm Post subject: |
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Just following up - I managed to put the necessary holes in my kettle and HLT. It took a lot of time and pressure. I ended up throwing together a cradle to hold the kettle on its side without moving so that I could put as much of my body weight on the drill as I could manage. That made things a lot faster and easier.
The punches are definitely critical - I used the step bit alone to drill mounting holes for my pumps in the shelf of an SS equipment stand, and even after filing them smooth they ended up irregularly sized and shaped. Okay in that case, but not for my shiny kettles! I was amazed at how easily they get through the steel after all that work to make the pilot hole.
Thanks everyone.
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hbohnet
Joined: 22 Sep 2013 Posts: 33 Location: Canmore, AB
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Link Posted: Thu Jul 12, 2018 2:34 pm Post subject: |
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I talked to a machinest before drilling my holes and got some good advice. Slow steady speed with considerable pressure on the hand held drill and use coconut oil for lubricant. I started the holes with a new (sharp) 1/8 bit then went to the step bit. Worked extremely well with nice clean holes. What he said was higher speed drilling causes heat and hardens the stainless making it even harder to drill. I put coconut oil on the punches and think that made it easier as well.
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Genuine
Joined: 31 May 2018 Posts: 8 Location: Putnam/Dayville, CT
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Link Posted: Thu Jul 12, 2018 2:42 pm Post subject: |
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I remember when I was drilling my keggles about 5-6 years ago, it was a huge pain. I had to add an additional hole to my kettle and was worried the entire time. However using cutting fluid and pulsing the drill and step bit made all the difference. I think I was done drilling in less than 5 minutes.
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Ozarks Mountain Brew
Joined: 22 May 2013 Posts: 737 Location: The Ozark Mountains of Missouri
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Link Posted: Thu Jul 12, 2018 3:59 pm Post subject: |
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you can cool the cheap step bits down with ice water too
_________________ "Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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windquest
Joined: 13 May 2018 Posts: 27 Location: Apache Jct, AZ
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Link Posted: Wed Jul 18, 2018 5:12 pm Post subject: |
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Hey erock, welcome to the fold.
There are a couple of "tricks" in punching holes in any thin metal. I built all my amateur radio equipment....that requires a lot of holes! So....I made a wooden insert for my 20 gal kettle ...just a 2x4 curved on each end to fit. Make sure it fits well, why? Well trick #2 is to use a drill press if at all possible....and that means you can apply a lot of pressure. Use a high quality step drill and you can make the holes without a punch. And you can't tell the difference.....really. Use a punch if you can and make the pilot slightly bigger than the shank of the punch and use lots of oil. I have never had a problem. Hope you punching is a big success.
Henry
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barney the bear
Joined: 15 Oct 2014 Posts: 46 Location: Linköping, Sweden
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Link Posted: Thu Aug 23, 2018 2:07 pm Post subject: |
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I use "ordinary" drills instead of a step drill for making pilot holes. But they are made of an special alloy for stainless steel containing cobalt.
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