Countersinking a flathead screw in sheet metal... - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Garage - Tools
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 09-15-2009, 07:43 PM
Registered User
 
Last photo:
Join Date: Sep 2007
Location: Wyoming
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Countersinking a flathead screw in sheet metal...

I know I've seen a tool that does this.

You put a cup on one side of the metal and a ball on the other, thread a screw through and then tighten, causing the correct size dent to accommodate your screw.

Anyone know what it's called? Google has been a bust and everyone I ask looks at me like I'm nuts...

Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-15-2009, 08:16 PM
47 Coupe's Avatar
Registered User
 
Last photo:
Join Date: Nov 2005
Location: Fort Worth,Texas
Age: 68
Posts: 104
Wiki Edits: 0

Thanks: 3
Thanked 0 Times in 0 Posts
They're called dimpling tools, here a link to some
[URL=http://http://www.averytools.com/c-72-dimpling-tools.aspx]
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-15-2009, 08:16 PM
S10 Racer's Avatar
http://www.warsprints.com
 

Last journal entry: W.A.R. (Wingless Auto Racing) Sprint Car Racing
Last photo:
Join Date: Nov 2007
Location: At The Dirt Tracks
Age: 55
Posts: 1,938
Wiki Edits: 0

Thanks: 4
Thanked 74 Times in 66 Posts
Quote:
Originally Posted by wyomingclimber
I know I've seen a tool that does this.

You put a cup on one side of the metal and a ball on the other, thread a screw through and then tighten, causing the correct size dent to accommodate your screw.

Anyone know what it's called? Google has been a bust and everyone I ask looks at me like I'm nuts...

Thanks
Aircraft industry uses what is called a "micro stop". Not sure if that is what you're looking for though. It is for countersinking sheetmetal.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-15-2009, 08:26 PM
Registered User
 
Last photo:
Join Date: Sep 2007
Location: Wyoming
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 47 Coupe
They're called dimpling tools, here a link to some
[URL=http://http://www.averytools.com/c-72-dimpling-tools.aspx]
Thanks. That's a much more obscure tool than I thought it would be.

Seems to me that I could get this done with a ball bearing and a piece of 2x4. I'll have to give it a try...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-16-2009, 09:41 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,983
Wiki Edits: 8

Thanks: 20
Thanked 242 Times in 218 Posts
These are easy to make yourself. It's called a dimpler.

You need a drill driven countersink and a piece of scrap 1/4" or thicker steel (a piece of steel tubing will also work, but not quite so well).

Drill the hole the size you want in the piece of plate - I usually use a slightly oversized drill, i.e. 1/32". Countersink that hole to the depth of the flat head screw you want to use and, voila, you have your dimpler for the price of a bolt and nut. If you are only doing a few holes, aluminum plate will work as well and is easier to countersink.

Dave W
__________________
Irelands child
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-22-2009, 05:07 PM
Kevin45's Avatar
Just one of the guys
 

Last journal entry: Garage Toys
Last photo:
Join Date: Jul 2002
Location: Urbana, Ohio
Age: 58
Posts: 3,060
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by S10 Racer
Aircraft industry uses what is called a "micro stop". Not sure if that is what you're looking for though. It is for countersinking sheetmetal.
Micro stop is a countersinking tool and not a dimpling tool. To make a dimple tool you really need a countersink to make the die. To make the punch you can use a ball although it is not accurate to the angle of the screw head but will work in a pinch. Most sheetmetal screws either use a 90 degree countersink or a 100 degree countersink. Flat head allen screws have 82 degree heads. What you want to do is drill a hole into a piece of metal the size of the threaded portion of the screw. Then with a countersink, start opening the hole up until you get it to where the screw head fits into it and will sit flush on the top of the metal. Now you have to open it up larger to compensate for the thickness of the metal. For example, if your metal is .032 thick, you will need to go approximately .032 deeper with your countersink into the metal you are using as your die. Now you will need a steel ball of the appropriate side to get it to form out, OR.....you can grind the end of a punch down to the same angle of your countersink and use that. Your main problem will be aligning the top and bottom without using a pilot.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-22-2009, 05:19 PM
Registered User
 
Last photo:
Join Date: Sep 2007
Location: Wyoming
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks.

I ended up drilling a hole in a piece of 1/8" as a backing plate, cutting off the threaded portion of the screw I was going to use, sticking it in piece I was making then clamping the whole thing in a bench vice until it was flush.

Not perfect, but close enough for what I was going to do with it.
Reply With Quote Quick reply to this message

Recent Garage - Tools posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sheet Metal Rust Repair James Turney Body - Exterior 6 10-03-2007 11:32 AM
Need Sheet Metal Welding Help cab Body - Exterior 28 02-19-2007 05:25 AM
sheet metal work robs ss Body - Exterior 2 11-22-2006 05:19 AM
Where to buy Sheet metal cab Body - Exterior 12 07-25-2006 08:38 PM
Sheet metal 1937 pickup cab back rear detail magnum2u Body - Exterior 6 11-05-2005 12:27 AM


All times are GMT -6. The time now is 07:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.