Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Tool Talk Discussion Forum

Removal of a thread tap broke off inside thread hole

Welcome Guest, Log in or Register
Author 
Joe Novak

11-07-2007 11:22:01




Report to Moderator

Does anyone have a solution for removing a broken off 1/4" x 20 thread tap from a threaded hole, without burning it out. The tap is broke just below (inside) the hole rim and has about 5/8" of tool inside the steel. The tap steel is harder than the titaium and carbide bits I"ve tried to drill a hole with for inserting a EZ out extractor. The steel is about 7/8" thick and the hole goes all the way through. Thought about trying to drive the tap out backwards with a punch and heavy hammer then just tap the hole one size larger. Anyone had luck doing that?

[Log in to Reply]   [No Email]
JerryCPP(WA)

11-11-2007 14:54:16




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Probably too late with this comment, but using a regular acetylene torch works well. Taps have a very high carbon content, so get the tap hot, hit the oxygen, and it all blows out before the metal you were tapping gets hurt. Scary, but it works well.



[Log in to Reply]  [No Email]
Don-Wi

11-09-2007 00:38:51




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Try to chip it out- you need a hard punch and a good hammer for this.

Otherwise at work I'll throw it in the CNC vertical machinig center and plunge in wiht a small carbide endmill. A drill will walk and get wrecked before it does any good. An endmill won't walk and most the time you'll get it out. Ussually trash the endmill though, so it has to be worth the effort.

Espescially worth it in a big peice of aluminum. I had to get out a 3/8 tap a couple weeks ago...

Donovan from Wisconsin

[Log in to Reply]  [No Email]
baler46

11-08-2007 04:02:28




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Hi Just a thought is it possible to weld a small washer on top of the broken off stud,weld it on the inside of washer.Then weld a small nut to the washer and just use a wrench and wrench it out.Plus the heat from welding makes stud smaller.Some times there is not any room to do this just and idea.



[Log in to Reply]  [No Email]
Bud in WV

11-08-2007 04:00:53




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Try this ->Link

check>Link the site - you can buy a single extractor, too. Not a tool you'll use often, but if you ever need it, it'll pay for itself in 30 seconds.
MSC will have it to your door within 24 hours, too!



[Log in to Reply]  [No Email]
glennster

11-07-2007 14:05:29




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
i broke a 1/4-20 tap off in the front bolster of my cub where the radiator bolts down. i used a small punch and a ball peen hammer, hit the tap and break it in small pieces, the use a small pick to dig the pieces out. takes about half an hour of tapping.



[Log in to Reply]  [No Email]
36 coupe

11-07-2007 13:42:59




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Dont use dull taps....



[Log in to Reply]  [No Email]
deanthebean

11-07-2007 12:24:36




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
skip sears use your plasma cutter and a chistle or
torch until redhot then squirt w/wd40 this will shrink tap in hole spin out w/ screw driver this second method works only on thru holes.



[Log in to Reply]  [No Email]
old

11-07-2007 11:55:52




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
As KITO says they make a tool just for doing that. It has 4 pins that fit down the sides of the broken tap and then you just back it out in theory that is. Most of the time they work well but theres always that one that it doesn't. They are even harder then the tap so most of the time they do a good job

[Log in to Reply]  [No Email]
Dick L

11-07-2007 12:28:27




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to old, 11-07-2007 11:55:52  
Out in the tool shop I have a whole draw full of those tap extractors all bent up. If the tap is at all dull or in more than a few threads you will not get them out with the tap extractor thingy. The only exception is when hurrying spinning the tap out and bump the handle hard and snap it off. Never had enough broken taps to justify the cost of machine to burn them out. Same with an EDM machine that will burn out taps as well It is much cheaper to send out what little EDM work I have.

[Log in to Reply]  [No Email]
Dick L

11-07-2007 11:42:55




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Here in my mold shop we chip them out in pieces and then drill out the hole a couple of hole sizes larger and tap it out then screw in a piece of steel and start over. Tig the top and grind flush. At home on tractor parts with a blind hole I grind them out with a dremal grinder. Takes a spell but I just figure it is the cost of not watching my nittin so to speak.



[Log in to Reply]  [No Email]
135 Fan

11-07-2007 11:34:37




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
Drill a hole slightly smaller than the tap in a piece of 1/8 or similar flat bar and weld it to the tap. It should spin right out. Then you don't have to go to a bigger size. Just run a new tap through it. Dave



[Log in to Reply]  [No Email]
KITO169

11-07-2007 11:26:45




Report to Moderator
 Re: Removal of a thread tap broke off inside thread hole in reply to Joe Novak, 11-07-2007 11:22:01  
A tool is made specificly for the removal of broken taps. I believe Sears sells them. I know tool trucks have them. They have small pins that fit in the flukes and put pressure on the shoulders to remove the broken tap.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy