Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-09-2012, 03:06 PM   #1
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


I have some fabricated steel columns in which the bottom plate needs four holes drilled in it to set the pier's anchor bolts through it. Each pier's anchor bolts are different(Ya, I know it was stupid) so I'll have to measure each one carefully. I figure before I get out my Dewalt hammer drill or speed drill, I'd ask which bit is best. The fabricator suggested a "Gas Powered Drill", but I never heard of that. He didnt think I'd be able to do it with a regular drill. Obviously a drill press wont work at this point. Has anyone had to do this?

peakcelln is offline   Reply With Quote
Old 10-09-2012, 03:16 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,518
Rewards Points: 4,152
Default

What is best portable way to Drill holes through 1/2" steel?


Unless your working on a site with no electrical power I have no idea why he came up with the idea of a gas powered drill.
Any heavy duty D handle or right angle drill will drill it. Any light duty or 3/8 drill will be burned up before you finish the job.
Without a drill press I'd be drill with several differant sized bits working up to a 5/8 bit. Any colbalt drill bit will work. I'd try a 3/8 bit first then work my way up. You need to run the drill slower as the size gets bigger. If the metal over heats it's going to work harden and be all but impossible to drill. Shot of using cutting oil a splash of water once in a while will help keep it cool.

I suggest the 5/8 size because if your bolts are 1/2 there's no way to slip them into a 1/2 hole.
FOr the last hole you may need a Silver and Deming drill. They have a 1/2 shank with a drill size that's larger.


Last edited by joecaption; 10-09-2012 at 03:19 PM.
joecaption is offline   Reply With Quote
Old 10-09-2012, 03:22 PM   #3
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


So maybe a 3/8, then, 1/2, then 5/8(I think that is the size of the anchor bolt)?
peakcelln is offline   Reply With Quote
Old 10-09-2012, 03:26 PM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,518
Rewards Points: 4,152
Default

What is best portable way to Drill holes through 1/2" steel?


Hole has to be bigger then the bolt.
Anyway to take them to a machine shop that has a plama cutter. Plama would give you the cleanest hole, but even a cutting torch would work, just clean it up with a grinder when done.
joecaption is offline   Reply With Quote
The Following User Says Thank You to joecaption For This Useful Post:
peakcelln (10-09-2012)
Old 10-09-2012, 04:19 PM   #5
Member
 
Join Date: Dec 2011
Location: B.C. Canada
Posts: 2,055
Rewards Points: 1,030
Default

What is best portable way to Drill holes through 1/2" steel?


Get a portable welder guy to come do them with the plasma
If drilling start with 1/4" then up by 1/8" from there.
mae-ling is offline   Reply With Quote
Old 10-09-2012, 04:50 PM   #6
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


Paying a welder guy to come out might be a bit expensive. Since they charge by the hour, how long do you think it would take to cut 40 holes?
peakcelln is offline   Reply With Quote
Old 10-09-2012, 04:57 PM   #7
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,736
Rewards Points: 2,468
Default

What is best portable way to Drill holes through 1/2" steel?


Why not take your fabricated steel columns back to the fabricator and have him finish the job?
__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is offline   Reply With Quote
Old 10-09-2012, 05:01 PM   #8
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


I think I covered this in the OP, every pier's anchor bolts are different. We told them to not cut the holes. Next time I'll use a template to set the anchor bolts @ 7" square.
peakcelln is offline   Reply With Quote
Old 10-09-2012, 05:08 PM   #9
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,736
Rewards Points: 2,468
Default

What is best portable way to Drill holes through 1/2" steel?


Quote:
Originally Posted by peakcelln View Post
I think I covered this in the OP, every pier's anchor bolts are different. We told them to not cut the holes. Next time I'll use a template to set the anchor bolts @ 7" square.
Then make some templates and take them back. 40 holes that big in 1/2" steel is going to kick your butt.
__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is offline   Reply With Quote
Old 10-09-2012, 05:25 PM   #10
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


How long do you think it would take a welder with a plasma cutter?
peakcelln is offline   Reply With Quote
Old 10-09-2012, 05:55 PM   #11
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,063
Rewards Points: 3,790
Default

What is best portable way to Drill holes through 1/2" steel?


Drilling 40 holes through 1/2" steel with a portable drill will take a lot longer then you think. Basically you'll be drilling 120 holes. 40 with each size bit. And you will probably need several of each, depending on your patience. A lot of people lose patience, and run the bit at too high of a speed without enough oil to keep it cool, and over heat the bit.
beenthere is offline   Reply With Quote
The Following 2 Users Say Thank You to beenthere For This Useful Post:
kwikfishron (10-09-2012), peakcelln (10-09-2012)
Old 10-09-2012, 06:00 PM   #12
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


Sounds like hiring the local welder for $200(His quote when I called him) may be best. I'll probably spend close to that in cobalt bits.

I guarantee I'll have the template ready for the anchor bolts next time.
peakcelln is offline   Reply With Quote
Old 10-09-2012, 06:05 PM   #13
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,736
Rewards Points: 2,468
Default

What is best portable way to Drill holes through 1/2" steel?


Also...when drilling steel with a hand held drill and you're almost through the bit likes to bind. If the drill has any kind of torque it will take you for a ride. That was the basis of my "kick your butt" comment.
__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is offline   Reply With Quote
Old 10-09-2012, 06:07 PM   #14
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,584
Rewards Points: 2,496
Default

What is best portable way to Drill holes through 1/2" steel?


Mag Drill.

Put it in position....hit the switch....it will stay there.....basically, it's like a portable drill press.

__________________
Even if you are on the right track, you will still get run over if you just sit there.

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
The Following 2 Users Say Thank You to ddawg16 For This Useful Post:
mae-ling (10-09-2012), oh'mike (10-09-2012)
Old 10-09-2012, 06:09 PM   #15
Member
 
Join Date: May 2012
Posts: 78
Rewards Points: 75
Default

What is best portable way to Drill holes through 1/2" steel?


Well, my partner in all this has had alot of experience in structural Steel framing, drywall, ceiling grid, etc in commercial applications; but not much in plate steel. I was understanding this process to be alot easier then it now appears.

peakcelln is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Removing cut, rust old 1 1/2" steel pipe Pharmtoxboy Plumbing 5 03-11-2012 09:37 AM
How many holes can I drill into a wood stud? lostintyme Building & Construction 8 02-28-2012 08:26 PM
Basement Renovation Question KUIPORNG Remodeling 234 08-26-2008 09:19 AM
recommendations for an all-purpose drill mcvane Tools 18 11-29-2007 10:12 AM
Is the 1/2" Craftsman Drill a goner? KUIPORNG Tools 1 02-26-2007 12:22 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.