Happy HolidaySs Giveaway - Winners Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > Drill Bit of Chassis Punch for 1/4" NPT
Reply
 
LinkBack Thread Tools
Old 05-10-2012, 02:49 AM   #1
signal2noise
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Smithtown, NY
Posts: 31
Default Drill Bit of Chassis Punch for 1/4" NPT

Greetings,

I am modifying my keg mash tun and adding a custom made thermowell that will accept a digital temperature probe. I am using a 1/4" tube compression to 1/4" NPT, where the NPT will pass through the keg wall. The 1/4" NPT outside diameter measures 0.518" on my caliper but an online source says the nominal outside diameter is 0.540".

Question is, should I use a 5/8" (0.625") bit or chassis punch to get through the keg or should I use a 1/2" (0.50") bit/punch and then grind out the hole a bit more using a dremel tool and metal cutting wheel?

Suggestions and advice would be very appreciated.

__________________
signal2noise is offline
 
Reply With Quote Quick reply to this message
Old 05-10-2012, 03:38 AM   #2
barrooze
Feedback Score: 7 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pearland, TX
Posts: 2,336
Liked 112 Times on 94 Posts
Likes Given: 141

Default

I'd drill it with a 9/16 bit if you had one.

__________________
Kegged: Flanders Blonde, Saison (Belle Saison), Festbier (ECY15), BOSON Prime (Brett Oaked saiSON), Night Howl Pumpkin Ale Primary: None Souring: Sour Brown (ECY01), BOSON on Rhubarb On Deck: Pale ale, Ginger Beer On the Horizon: Epic Pale ale clone, Zombie Dust clone Updated: 2014/11/18
Untappd: barrooze
barrooze is offline
 
Reply With Quote Quick reply to this message
Old 05-10-2012, 03:40 AM   #3
ChuckO
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ChuckO's Avatar
Recipes 
 
Join Date: Oct 2008
Location: Keyrock, WV
Posts: 934
Liked 90 Times on 75 Posts
Likes Given: 13

Default

The difference between .540 and .625 is significant. Drill smaller and grind out.

__________________
ChuckO is offline
 
Reply With Quote Quick reply to this message
Old 05-10-2012, 05:03 PM   #4
signal2noise
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Smithtown, NY
Posts: 31
Default

Thanks for the help! A 9/16 bit may be the ticket.

__________________
signal2noise is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How do I drill a hole in a Keg big enough for a 1" Coupler? rudy0498 Kettles, Mash Tuns, & Hot Liquor Tanks 21 09-13-2011 10:01 PM
What size holes to drill in keggle for 1/2" couplings?? I-Hop Kettles, Mash Tuns, & Hot Liquor Tanks 2 03-28-2011 08:21 PM
Harbor Freight 1/2" D-handle drill $32.99 wilserbrewer Other 16 02-10-2010 08:30 PM
chassis punch keggle? buffalobrewer Kettles, Mash Tuns, & Hot Liquor Tanks 6 12-07-2009 03:32 AM



Newest Threads

LATEST SPONSOR DEALS