| Author |
Message |
    
Milli (Milli)
| | Posted on Thursday, January 16, 2003 - 04:00 pm: | 
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Trying to get a bolt out of the rear crossmember (holds the bumper on (D90)). It broke off with about 1/4 inside 1/4 outside, so I can get a grip on it, but vise grips are shredding the bolt and it will not turn. Any tricks appreciated?! Thanks. |
todd slater (Toddslater)
| | Posted on Thursday, January 16, 2003 - 04:28 pm: |
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Drilling it out and retapping it may be at the end of the road for you. Short of this, drill thru the center of it (use a bit that is appox 1/2 to 3/4 your bolt diameter) and use an easy out (availible from sears hardware). Use generous amounts of liquid wrench or similar rust penetrant and lots of heat. If it comes out,your lucky and you have saved your threads...if not well bigger bit, drill and retap. Not the end of the world. |
Milli (Milli)
| | Posted on Thursday, January 16, 2003 - 04:57 pm: |
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Thanks Todd.
Should I torch it, like red hot? |
muskyman
| | Posted on Thursday, January 16, 2003 - 10:59 pm: |
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when using a easy out the trick is to center punch the stub as close to center as you can then drill it twice. the first should be a very thin pilot hole all the way thru the broken part/stub,this will allow you to get liquid wrench/blaster in behind where its stuck. then the second drill bit should be as large as you can without hitting the threads. by drilling a very large hole you allow the stub to deform as you apply the removal torque on the easyout. by doing it this way it will take longer but will almost always work.
good luck! |
Bill Bettridge (Billb)
| | Posted on Friday, January 17, 2003 - 11:38 am: |
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God I hate to disagree with Musky, but when using an easy out - you want to use the smallest one that will do the job.
The problem with drilling the broken bolt with a very large bit is that when you insert the easy-out and begin to turn it, it will actually expand the now thin walls of the bolt against the threaded hole - thereby making it harder to get out.
My machinist yelled at me for doing this when I brought a hub to him that I couldn't get the brokem bolt out of, so I learned something new too!
That being said - you don't want to choose a size so small that the hardened easy-out snaps off, leaving you with a hardened part to try to drill.
Bill |
muskyman
| | Posted on Friday, January 17, 2003 - 01:54 pm: |
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lol...its allright to disagree with me, there are many ways to skin a cat..it was a journeymen toolmaker that taught me to use them 25 years ago.right after I broke one of his easy-outs off in a part. as he explained it unless you are almost as large as the stud with the easy-out more often then not the easy out will break.its a diameter vs strength and materials thing...kinda like axles.
he also showed me that heat is good but only when you can heat the area around the stud not the stud itself.if you heat and expand the stud it often gets tighter. where if you heat and expand the metal around it the stud gets looser.
I rarely use heat with easy outs just one more step to deal with. plus heat makes the wonder juices less effective and because most stucks are from rust and corosion a chemical breaking of the bonds is important.
I hate to admit it but getting unstuck things loose is one of my favorite shop chores, very few things give me the feeling of accomplishment as getting a stuck part off/out.
one of my favorite ways is to place a nut on top of the stuck stud and very carefully plunge weld down the bore of the nut to connect it to the stud. it takes a very steady hand and good direction control of the heat to avoid welding the nut to the part and not just to the stud.let it cool completly before torquing to allow the weld to reach full strength.
one last word of wizdom
NEVER USE A EASY-OUT WITHOUT SAFTY GLASSES!!!! |
Jude (Jdonato)
| | Posted on Friday, January 17, 2003 - 02:06 pm: |
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With 1/4" broken bolt sticking out, place a grade 8 nut over it and tack weld it to the broken shaft. Simply wrench it out. Forget all that easy out stuff.
Jude |
thom mathie (Muskyman)
| | Posted on Friday, January 17, 2003 - 02:15 pm: |
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here's something I have been using lately on smaller stuff it called a drill extractor
it does the whole job in one step. I thought it wouldent work but me being the tool junky I am I tried them anyhow and have yet to have one brake or fail to get a part out. |
Bill Bettridge (Billb)
| | Posted on Friday, January 17, 2003 - 03:14 pm: |
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Musky
Guess all machinists/tool& die makers have many ways of doing things, and they all probably work because they're skilled at what they do in general. My machinist is now 74 and started in a shop at 14!
You really like getting stuck parts out - for fun!? LOL - that's pretty funny 
I've seen those drill extractors and didn't really believe they'd work - dammit, now I have to go buy some too (tool junky also) - I'm sure my wife will thank you
Thanks for the tips
Bill |
todd slater (Toddslater)
| | Posted on Friday, January 17, 2003 - 06:48 pm: |
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I know what you mean Musky....truly one on the last great challenges in life ...the pesky stuck parts. Have you found yourself doing a victory dance after you've defeated a real SOB. I have even named the various heating apparatus I use...of course my favorite is "the big heater" |
muskyman
| | Posted on Friday, January 17, 2003 - 07:06 pm: |
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todd,
yep victory dances, high fives and toasts are often seen after it comes out/comes off. some of the most gratifying ones are the ones when its taken all day, someone goes for beer because they gave up and when they return you reach in your pocket and pull out the trophy in all its narled splender with that knowing smile look what I did.
of course followed by a complete description of what it took
thom |
Shawn McKenzie (Shawn)
| | Posted on Friday, January 17, 2003 - 11:02 pm: |
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Ah Muskyman, good call on the safety glasses. A friend was using a wire wheel on a pedestal grinder last night and a wire came off and went for his eyes.
It was over instantly... went through the lens and stuck out about 1/4" on the inside. He's pretty happy about having safety glasses on! |
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