Is JB Weld STRONG???
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,926
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Is JB Weld STRONG???
Well, I have been fighting for a few weeks to extract a bolt. Well after finally getting a carbide drill bit, I was able to drill a hole about an inch in, then I put a extractor in (And I put it in, with a hammer). Its the straight type that snap on sells.
Anyways, all seemed well then the thing snapped. It was sticking out far enough to see it but not enough for a pair of vice grips to grasp.
So, can I put some JB weld on a thin socket, tap it on, and hope it will get enough grip after hardening to help pull it out?
Anyways, all seemed well then the thing snapped. It was sticking out far enough to see it but not enough for a pair of vice grips to grasp.
So, can I put some JB weld on a thin socket, tap it on, and hope it will get enough grip after hardening to help pull it out?
Pro
Joined: Apr 2008
Posts: 545
Likes: 3
From: Wichita Kansas
I'm with Demonic, nothing to lose at this point. But I would think the extractor is hardened and will be tougher than most things you might be able to attach to it. Which bolt, where at and what's it hold? Is the entire component removable? Maybe take to a machine shop?
Could something be welded to the stub to give you something to get a hold of and maybe weld a socket to that? Just trying to think of ideas.
Could something be welded to the stub to give you something to get a hold of and maybe weld a socket to that? Just trying to think of ideas.
Last edited by c4sailor; Jun 14, 2008 at 03:56 AM.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,926
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Well guys it is a crankshaft hub bolt. It got work hardened with lesser quality bits. When the carbide drilled into it, I figured all was well. It was originally torqued around 70ft/lbs, but work hardeneing it etc has caused it to be tight!
Hopefully the JB weld will allow me to move it back and forth to where it finally comes out, then I can redrill with a new larger size carbide bit and try a bigger extractor. The next size is the last before threads are gone, then its machine shop time.
Friday the 13th, what a day.
Hopefully the JB weld will allow me to move it back and forth to where it finally comes out, then I can redrill with a new larger size carbide bit and try a bigger extractor. The next size is the last before threads are gone, then its machine shop time.
Friday the 13th, what a day.
Racer
Joined: Mar 2003
Posts: 346
Likes: 33
From: OKC OK
If the JB fails there is another option. A very small pencil grinder with Carbide burrs will eat up the easy-out. Vinnies idea of PB & Heat can help loosen the possible corrosion in the threads. A small propane torch & really careful not to damage the original heat treatment of the crank If you can find a shop that has an EDM machine, that will remove the offending easy-out & bolt, provided the crank is out of the block.
Racer
Joined: Jul 2007
Posts: 313
Likes: 0
From: Laurel MS
JB Weld
My experience...damn straight it's strong on metal...but won't work on plastic. What does work on plastic? What kind of plastic do you have? I don't know...just give me something that works.
Cheers
Cheers
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Pro
Joined: Mar 2005
Posts: 666
Likes: 0
From: Walton KY
I have a similiar problem with my motorcycle. My steering stabilizer bolts thru the gas tank front tabs into the aluminum frame. Well stainless and aluminum make a nasty combo with corrosion and I broke a bolt off. I drilled down and tried to used an extractor and broke it off also. I have burned thru a bunch of bits trying to get it out. I cannot get a torch in there. Any ideas?
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Well guys it is a crankshaft hub bolt. It got work hardened with lesser quality bits. When the carbide drilled into it, I figured all was well. It was originally torqued around 70ft/lbs, but work hardeneing it etc has caused it to be tight!
Hopefully the JB weld will allow me to move it back and forth to where it finally comes out, then I can redrill with a new larger size carbide bit and try a bigger extractor. The next size is the last before threads are gone, then its machine shop time.
Friday the 13th, what a day.
Hopefully the JB weld will allow me to move it back and forth to where it finally comes out, then I can redrill with a new larger size carbide bit and try a bigger extractor. The next size is the last before threads are gone, then its machine shop time.
Friday the 13th, what a day.
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
Any of those two part clay-like epoxys are amazing. My company has some wheat moving facilities, and the moving wheat wears every out--puts holes in quarter inch stainless. They fix it with jb weld stuff and it wears better than the steel.
I just removed 4 broken studs last week and I tried everything--extractors, super lube, torch--just kept breaking the end off, what a nightmare. Finally studs were all broken off, but my last resort worked on all four studs. This won't help you if you have already drilled into the piece but I slotted the stud and took it out with an impact driver.
Good luck.
I just removed 4 broken studs last week and I tried everything--extractors, super lube, torch--just kept breaking the end off, what a nightmare. Finally studs were all broken off, but my last resort worked on all four studs. This won't help you if you have already drilled into the piece but I slotted the stud and took it out with an impact driver.
Good luck.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,926
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Thanks guys. I will put some more penetrant on the bolt for a few hours this morning. I am able to move the extractor back and forth a little, so I am hoping it will eventually come loose, as its not threaded in there, just tapped in.
Then I will see about next size up or take the crank out and have a machine shop fix it.
Worst case, Heli Coil, or retap for next size bolt 1/2x20.
Then I will see about next size up or take the crank out and have a machine shop fix it.
Worst case, Heli Coil, or retap for next size bolt 1/2x20.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
JB Weld is good for filling holes and minor repairs but will not take the torque that you need on the extractor. Don't waste your time. It might go up to 3000 psi where as a piece of steel might be at the 60,000 rate.
Small carbide tip on a grinder and hours of patience...
Or drill out the whole thing. Then drill oversized and retap oversized and get new bolt.
Small carbide tip on a grinder and hours of patience...
Or drill out the whole thing. Then drill oversized and retap oversized and get new bolt.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,926
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
JB Weld is good for filling holes and minor repairs but will not take the torque that you need on the extractor. Don't waste your time. It might go up to 3000 psi where as a piece of steel might be at the 60,000 rate.
Small carbide tip on a grinder and hours of patience...
Or drill out the whole thing. Then drill oversized and retap oversized and get new bolt.
Small carbide tip on a grinder and hours of patience...
Or drill out the whole thing. Then drill oversized and retap oversized and get new bolt.
Le Mans Master
Joined: Jul 2004
Posts: 9,835
Likes: 0
From: In front of C6s.
St: Jude Donor '10
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
What is the chance of using a drummel with a small cut off wheel to cut a slot in the extractor then a screwdriver to try and back it out?
Don't think it would work either. Extractors are usually hardened steel, more than grade 8.
Best of luck....try anything and everything.
Don't think it would work either. Extractors are usually hardened steel, more than grade 8.
Best of luck....try anything and everything.
Nothing like a little ---- engineering!
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,926
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
What is the chance of using a drummel with a small cut off wheel to cut a slot in the extractor then a screwdriver to try and back it out?
Don't think it would work either. Extractors are usually hardened steel, more than grade 8.
Best of luck....try anything and everything.
Don't think it would work either. Extractors are usually hardened steel, more than grade 8.
Best of luck....try anything and everything.
I think it is time to get a loan, and go to the machine shop.
I R DUN!!!