Repairing Damaged Threads - 1/2" X 20 - 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> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-07-2008, 07:32 AM
72NOVA454
 
Last photo:
Join Date: Nov 2004
Location: chicago area
Age: 51
Posts: 922
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Repairing Damaged Threads - 1/2" X 20

I've got a situation where I have a 1/2" x 20 bolt (wheel stud) where the first 2-3 threads are not cleanly defined in some areas, and the nut is not going on straight. This nut came off clean and easy - not sure how or why the last couple threads got damaged. They look very repairable, there is just a couple of "spots" on the thread that need to get cleaned up, most of the thread around the nut is perfect.

What is the best way to restore/repair those last couple of threads? Should I get a 1/2" x 20 die, or is there some other secret method? A tiny file that fits in between the threads? I've tried a few different nuts and none of them will spin on. I'm just using my fingers on the nut - I know not to force it on or it will make the situation worse.

Lee

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-07-2008, 07:45 AM
Registered User
 

Last journal entry: Bringing home the 401 Nailhead
Last photo:
Join Date: Jul 2006
Location: NE Ohio
Posts: 381
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Find a thread file. Here is one supplier:

http://www1.mscdirect.com/CGI/GSDRVS...00000070998603

Sure there are others. Be sure that the file you purchase has a 20TPI profile.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-07-2008, 08:32 AM
Registered User
 
Last wiki edit: Removing stuck fasteners
Join Date: Jun 2002
Location: Adairsville
Posts: 94
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
repairing lug studs

I just change it, it'd be a quick and great repair for almost nothing. Just knock it out and install another by putting it in the hole and then a larger nut over the threaded end and start the nut (also new) and tighten to pull it into the hole. lol
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-07-2008, 08:33 AM
OHD's Avatar
OHD OHD is offline
Member
 
Last photo:
Join Date: Sep 2008
Location: outhouse
Posts: 285
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Are the damaged threads on the outside towards the end of the stud? If so you can attempt to clean them up with a file wire wheel or die.

If they are down next to the wheel, where the nut applies the holding/clamping force, replace the stud.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-07-2008, 08:44 AM
72NOVA454
 
Last photo:
Join Date: Nov 2004
Location: chicago area
Age: 51
Posts: 922
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by heyjude076
Find a thread file. Here is one supplier:

http://www1.mscdirect.com/CGI/GSDRVS...00000070998603

Sure there are others. Be sure that the file you purchase has a 20TPI profile.
wow - I feel like a total ******* now - I never new such a tool existed. I must have 500 tools in my garage and I've never seen a thread file. I attached a photo so other dummies like me can see what this tool is and learn from it. I'm sure every machinist and auto mechanic (except me) has one.

I'm buying one today. That will fix my problem - thanks buddy.

For dummies like me that never knew this tool existed - here is what it looks like. The tool has 2 halves. Each half has four different TPI (thread per inch) files. So a total of 8 thread files in 1 tool.

Lee

Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-07-2008, 08:48 AM
72NOVA454
 
Last photo:
Join Date: Nov 2004
Location: chicago area
Age: 51
Posts: 922
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by lanier ledford
I just change it, it'd be a quick and great repair for almost nothing. Just knock it out and install another by putting it in the hole and then a larger nut over the threaded end and start the nut (also new) and tighten to pull it into the hole. lol
sounds like a good idea except......................this is not an OEM stud. It's a 1/2" X 20 by 2-1/2" long. I have to pull the axle out to remove the stud. Not enough clearance behind it to screw it out. It's a threaded axle stud - not the press in type. Hard to explain but you get the idea. Pulling the axle is a pain in the butt as you know, just to repair 1 or 2 threads on 1 stud. I'm going to use a thread file as recommended by another forum member. Take care - and thanks.

Lee
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-07-2008, 08:53 AM
Registered User
 

Last journal entry: Bringing home the 401 Nailhead
Last photo:
Join Date: Jul 2006
Location: NE Ohio
Posts: 381
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by leejoy
I'm buying one today. That will fix my problem - thanks buddy.
Lee

I have several that cover most TPIs. Suggest you do the same.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-07-2008, 05:28 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 5,095
Wiki Edits: 0

Thanks: 2
Thanked 114 Times in 92 Posts
A small tool and die makers triangular file works just as well as a thread file, you probably already have one in your tool box. Easier to get into tight spaces too.
Reply With Quote Quick reply to this message

Recent Engine 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
Repairing a damaged crank by welding.. Old School Nut Engine 7 05-10-2006 09:05 AM


All times are GMT -6. The time now is 03:22 PM.


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.