Author Topic: Broken bolt removal  (Read 2654 times)

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Offline Al Smith

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Re: Broken bolt removal
« Reply #10 on: August 02, 2011, 03:42:10 pm »
The very worst I ever had to drill out was on my tree trimming buddy's old Lindag chipper .3/4" grade 8 cap screws .Hard as a rock that had gotten siezed because of running in the acidity of tree chips .

I gave him some never-seeze and told him that was the last time old Al was going to drill those darned things out .He took my advice . ;)

Offline nmurph

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Re: Broken bolt removal
« Reply #11 on: August 15, 2011, 08:51:22 am »
I bought my last left hand bits @ Autozone $6?.  Another option is lay a nut one size smaller on top of broken bolt mig/tig inside nut, remove w/ wrench.  On smaller stuff put use a washer slightly smaller tack then weld nut to washer.  Am going to use the last method on 359 muff.   Kid that was helping me broke e-z out off in muff support bracket hole (5mm bolt) me telling him don't pull too hard you will break it.  2 breath's later I heard him cussing.

Shep

Shep,
I had this exact same problem on a 359 this weekend. When I took the bolt out, I only had the last few threads on the bolt head. I soaked it in PB and heating it with a torch, then drilling it and using an extractor. It was too deep and wouldn't budge. I finally kept drilling it with progressively larger bits until I was nearly into the threads, then I took a M5 tap and used it to cut the remaining bolt out of the threads.

Offline bustedknuckles

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Re: Broken bolt removal
« Reply #12 on: February 25, 2014, 11:28:47 pm »
Just recently I've been seeing a extraction tool kit called the "speedout" advertised on TV. Anyone tried it? Has a special bit and then uses reverse in a cordless drill to extract it...
I have found some online reviews of its predecessor and they weren't overly favorable. I'm skeptical but was hoping someone here has actually put one to the test.

Offline KilliansRedLeo

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Re: Broken bolt removal
« Reply #13 on: February 26, 2014, 04:33:50 pm »
I received one for Christmas a few years back. They do work but for me only in soft metal screws into wood like brass door hinge screws for anything else well they will keep papers from blowing off your bench!
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Offline jmester

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Re: Broken bolt removal
« Reply #14 on: February 26, 2014, 05:21:21 pm »
If you have to drill and tap the hole you may want to look into timeserts they are a threaded steel insert. Madsens sells them for saw bolts but there web page has listed for metric and standard bolts. Have used them in a lot of saw repairs with great results a little expensive but worth it to me
http://www.timesert.com/index.html
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Offline jmester

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Re: Broken bolt removal
« Reply #15 on: February 26, 2014, 05:23:00 pm »
They will take your oversized tapped hole back down to the original bolt and thread size.
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Offline H 2 H

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Re: Broken bolt removal
« Reply #16 on: February 26, 2014, 07:37:03 pm »
Just recently I've been seeing a extraction tool kit called the "speedout" advertised on TV. Anyone tried it? Has a special bit and then uses reverse in a cordless drill to extract it...
I have found some online reviews of its predecessor and they weren't overly favorable. I'm skeptical but was hoping someone here has actually put one to the test.

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Offline turbo885

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Re: Broken bolt removal
« Reply #17 on: February 26, 2014, 07:48:11 pm »
set a washer and nut over it and fill with weld. I do it constantly on equipment a mig is easiest but I use a stick on the job most times. don't forget the flat washer
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Offline 660magnum

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Re: Broken bolt removal
« Reply #18 on: February 28, 2014, 11:30:46 am »
Back when I worked for a living we used to remove broken bolts with the welding a nut on it technique.

It involved welding onto the broken bolt through a washer with little short spurts until you built up enough bead to weld a nut onto the bolt through the inside threads

The washer on top prevents spatter and welding or melting the case. It guides the rod too. You have to generally use a small rod  like 3/32"

The rod has to be LH70 low high or stainless because it can weld neat and will weld to a hard grade 8 bolt

The heat of the welding helps to loosen the broken bolt

There can be no cadmium anywhere near the washer or nut. The washer and nut must be plain steel with no black oxide or shiny cadmium or nickel coatings. Weld will not stick to this stuff unless you can penetrate through it.
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Offline Fish

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Re: Broken bolt removal
« Reply #19 on: March 20, 2014, 10:28:01 am »
This is the best set I have ever used...

 

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