Tips for drilling Large Holes - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips

Construction Tips Construction techniques and tips

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th August 2009, 08:36 PM   #11
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC/McLean, VA
Yeah, I meant chassis punch, what Steerpike was talking about

I bought a Greenlee one for 3/4" holes because it's a commonly-used size in antenna mounts, but it was around $50 new. Should have looked on Ebay first, I know.
__________________
Jim J.
  Reply With Quote
Old 28th August 2009, 08:48 PM   #12
toufu is offline toufu  United States
diyAudio Member
 
Join Date: Jun 2008
Location: San Francisco
The hole punch idea sounds nice. What kind of tools do I need? Anyone wanna point me to a tutorial? Thanks.
  Reply With Quote
Old 28th August 2009, 08:59 PM   #13
diyAudio Member
 
Join Date: Sep 2004
Location: UK
Clamp the metal plate to a 1" piece of wood before drilling.

First drill a 1mm pilot hole.

I bought a "good-enough" Chinese made drill press for <US$100 which has make all this so much easier!
  Reply With Quote
Old 29th August 2009, 04:28 AM   #14
toufu is offline toufu  United States
diyAudio Member
 
Join Date: Jun 2008
Location: San Francisco
Hey guys, will this thing work? Is this a standalone or do I need other stuff to make it work?

http://shop.vetcosurplus.com/catalog...oducts_id=1214
  Reply With Quote
Old 29th August 2009, 11:51 AM   #15
diyAudio Member
 
Juergen Knoop's Avatar
 
Join Date: Jan 2007
Blog Entries: 3
Quote:
Originally Posted by toufu View Post
I am trying to drill large holes (1/2 inch) on smaller, light panels.
Those http://en.wikipedia.org/wiki/Counterbore will produce the best holes in aluminium sheets or panels.
Me normally uses this http://www2.westfalia.de/lexika/werk.../Stufenbohrer/ or this http://www2.westfalia.de/shops/werkz...m_16_30_mm.htm kind of drill.
Don't know the english expression.
regards
  Reply With Quote
Old 29th August 2009, 12:27 PM   #16
diyAudio Member
 
Steerpike's Avatar
 
Join Date: Jan 2006
Location: Johannesburg, South Africa
Quote:
Originally Posted by toufu View Post
The hole punch idea sounds nice. What kind of tools do I need? Anyone wanna point me to a tutorial? Thanks.
You need about a 1/4 - 1/2 inch drill bit - depending on final hole size, and a shifting spanner.
The punch comes in three parts: a sharp cutter, a cup, and the bolt.
You bolt the cutter to the cup - each on opposite sides of the sheet - with the bolt, which goes through the pilot hole you drilled.
Then you tighten the bolt until the cutter is forced into the cup, cutting a perfect hole in the sheet as it goes. When you are done, you disassemble the punch and take out a washer-like disc of metal that it has cut out.

http://za.rs-online.com/web/search/s...duct&R=0543557

These are not expensive - this one is around $12. Bigger ones obviously more expensive.
__________________
Steerpike's Toybox
  Reply With Quote
Old 29th August 2009, 02:20 PM   #17
diyAudio Member
 
Join Date: Feb 2006
Location: Chicago, IL
I find chassis punches at the local flea market all the time. Since they are used by electricians, they are fairly common, although small ones (1/2", etc) are somewhat rarer. I won't bore you all with what great deals I've gotten, but they're out there--so start looking.

--Buckapound
  Reply With Quote
Old 29th August 2009, 04:57 PM   #18
pchw is offline pchw  United States
diyAudio Member
 
Join Date: Apr 2006
Location: Fremont, California
Look for a Harbor Freight store nearby, there are a few in BA. When on sale with coupon, the chassis puncher set cost around $15. I use them to punch holes for tube socket and ruined only one puncher so far.
__________________
- Fred -
  Reply With Quote
Old 30th August 2009, 09:07 PM   #19
T in AZ is offline T in AZ  United States
diyAudio Member
 
Join Date: Jul 2009
Tapered Reamer, for light stuff
  Reply With Quote
Old 2nd September 2009, 08:48 AM   #20
Bonsai is offline Bonsai  Taiwan
diyAudio Member
 
Bonsai's Avatar
 
Join Date: Jul 2003
Location: Taipei, Taiwan
Quote:
Originally Posted by Jaac View Post
For large hole drilling i use a drill like this:

Click the image to open in full size.

I sharp the edges on the spinning stone to make them sharp. It works fine. I did my XLR (26 mm ??) in 6mm of aluminum. You should use some coolant to cool the metal. Also with large drill use the lowest RPM's on you drilling machine.

And other methode is to use point-welding drills like:

Click the image to open in full size.

But i don't know if the are there in your size. But also here is you have a drill bit that's large enough you can grind it to the point welding shape like in the picture above.

Wow. I dont think this is very safe advice for drilling metal of any kind.

I really would suggest you follow the advice further up this thread. To summarize:-

1. use a drill press and make sure your work is clamped well clamped to the drill press work surface or
2. make sure your work is well clamped if using a hand drill
3. start with a small drill diameter and work upwards with bigger drill bits to your final hole diameter
4. Use slowest drill speed - especially for aluminium
5. Use some cutting fluid - it works and makes a big difference (some 3-in -1 oil also works well)
6. Best solution: Drill press and a stepped cutter. Second best solution: hand drill and a stepped cutter.
__________________
bonsai
Amplifier Design and Construction for MUSIC! http://hifisonix.com/
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
TO-3 Drilling Jig BrianDonegan Solid State 17 11th January 2014 04:33 PM
FS: Large inductors, Large Ports, and Leaky Holes luvdunhill Swap Meet 10 6th March 2009 03:01 PM
drilling transformer mounting holes-bit broke! ThSpeakerDude88 Everything Else 5 27th October 2007 03:36 AM
Drilling a PCB KP11520 Everything Else 34 12th September 2007 12:28 AM
drilling holes in chassis Raj1 Pass Labs 6 3rd January 2003 06:56 PM


New To Site? Need Help?

All times are GMT. The time now is 07:02 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2