How do you punch out your chassis holes? - Page 3 - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 4th November 2005, 09:12 PM   #21
kevinkr is offline kevinkr  United States
diyAudio Moderator
kevinkr's Avatar
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Titanium or carbide drill bits up to 1/2" or so. Greenlee chassis punches or equivalent for holes up to 1 1/2" and a nibbling tool for odd sized or shaped holes.

Most of my chassis are aluminum from bud, hammond, or SMB. Easily worked which is why I mention them. Sometimes (rarely now) I make them from scratch if I have access to a good bending brake.

Steel is really hard on drill bits and punches.

While drilling use lubricants, remove swarf frequently. Lubricate draw bolt on punches, or better still get one with bearing if possible.

Be safe! (Wear safety glasses!)

  Reply With Quote
Old 4th November 2005, 10:11 PM   #22
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Safety Glasses

We have dozens of sets around here -- a small shard of metal can blind.
  Reply With Quote
Old 5th November 2005, 06:12 AM   #23
diyAudio Member
wrenchone's Avatar
Join Date: Feb 2004
Location: Silicon Valley
I use a conical step drill to make holes, then open them out if needed with a nibbler. The holes a lot of the time need a bit of deburring - I just use a drill somewhat bigger than the hole to clean the crud away.
  Reply With Quote
Old 9th November 2005, 01:34 PM   #24
garbage is offline garbage  Singapore
diyAudio Member
garbage's Avatar
Join Date: Apr 2004
Location: Singapore
Talking plain hard work

Originally posted by elementx
how do you? jigsaw? tiedious drilling?

i'm refering to socket holes, transformer holes...
first mark out 3mm or so from the perimeter, use a dot punch to mark reasonable distances for a 4mm drill bit. the idea is to end up with holes very near to each other. using a bench press, drill the required holes. use a hacksaw blade to saw thru all the holes, causing the inside piece of metal to fall out. then finish off with a metal file.

i did the below on a 5mm piece of aluminium. the cutout was for a led display for my preamp.

for thinner metals, you might want to check this tutorial.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

  Reply With Quote
Old 13th October 2012, 07:51 AM   #25
diyAudio Member
bullpeters's Avatar
Join Date: Apr 2009
Location: in the land of OZ. right next to beach
80 bucks on ebay in Australia gets you a 10 ton press that knocks holes in 3mm mild steel and no burrs!!
  Reply With Quote
Old 13th October 2012, 09:20 AM   #26
multi is offline multi  Australia
diyAudio Member
Join Date: Jan 2011
There are lots of Chinese made Hydraulic chassis punches on Ebay. about $A150.00
i have found they are very good, not as good as the Japanese hydraulic chassis punches, but they cost $1500.
  Reply With Quote
Old 13th October 2012, 12:24 PM   #27
balerit is offline balerit  South Africa
diyAudio Member
balerit's Avatar
Join Date: Apr 2011
Location: South Africa
  Reply With Quote
Old 13th October 2012, 12:39 PM   #28
roline is offline roline  United States
diyAudio Member
roline's Avatar
Join Date: Sep 2010
Location: East Tennessee
Greelee hole punches for tubes and stepped drill bits for up to 3/4 inch. The Greelee punch is just a little too small and holes get a final sanding for the sockets to just pop through. I leave a little clearance for thermal expansion when the tubes heat up.
For the tube vent slots I use a jig to hold the axle for the center of the tube in a mill and use a 3/16" 4 flute bit and rotate the top to get the arc needed. Lift the bit, rotate to the new spot, drop the bit and rotate the top plate again.
Attached Images
File Type: jpg front_view.jpg (576.6 KB, 101 views)
SO many tubes, SO little time!!!
  Reply With Quote
Old 13th October 2012, 12:47 PM   #29
SY is offline SY  United States
On Hiatus
SY's Avatar
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 2
Compactron driver to sweep tube outputs? I like your style.
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
  Reply With Quote
Old 13th October 2012, 02:16 PM   #30
diyAudio Member
Join Date: Jan 2008
Location: Salt Lake Silly, Yewtaw
I've used punches, verticle mill, and water jet cutting. Lately, I've been toying around with the idea of using carefully formed charges of C-10.

  Reply With Quote


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
Chassis/Enclosure that has all the holes on the back precut??? nick_g_evans Chip Amps 3 6th December 2007 05:13 AM
Silly Chassis Punch Question... soulmerchant Tubes / Valves 15 22nd November 2006 07:01 PM
What do you guys use to drill holes on chassis?? jamesjung21 Tubes / Valves 48 15th May 2005 08:21 AM
Chassis constrution and tapping holes s_c_leach Solid State 7 30th June 2004 10:17 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 12:28 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2