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How do you..

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tlak

10-26-2002 05:47:58




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..get a busted easy out out? Its down to a chunk of metal because Ive been drilling and grinding it. What are common home and machine shop processes?




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Richard

10-26-2002 16:03:00




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
Tlak,
That is where I learned the method I told you about was in a automotive machine shop. When drilling & tapping high performance blocks it never failed that someone would break a tap or drill bit. I removed a broken drill bit from the main saddle of a very rare 428 that had been left for scrap. Be careful, take your time, and use eye protection. It works!



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tlak

10-26-2002 13:27:49




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
There was three in all to get out. If I would have figured after all the years the bolt was welded to the block I would have did them all three same. I bolted the head to the block and used a bit the size of the head bolt hole not the tap size. I marked the bit so it would stop at the block level leaving an indent in the old bolt. I then used the tap size drill bit and used the indent as a center and drilled and tapped. So two done in no time and one messed up.

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Ludwig

10-26-2002 11:24:47




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
Or you could get yourself a hardened chisel and very slowly break it out. Be very careful with this though as its easy to beat up the stuff around the ez out.

I've NEVER had an ez out work. Used 'em about 5 times and the boogers just break. My friend Ed swears by them but admits he's only got about a 50% success ratio.



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Neal in NM

10-26-2002 08:58:07




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
What I do in my shop is clamp the part in the mill and peck drill it out with carbide. Doing it in the field is a little more dificult, the carbide drill does not take deflection like a regular drill. I would probably use a masonary bit to drill out the ez out. N.



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Richard

10-26-2002 07:13:15




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
I will tell you how I do it, and it works everytime, however there will be a dozen people here tell you how unsafe it is, it it may very well be unsafe but I have been doing it for 25 years without a problem.

Take a very small brazing tip, put the torch very close to the material your removing, heat it up nice and hot, then slowly crank the oxygen up and it will blow it out. Works with air as well and may be a little safer but it will take longer. I have removed drill bits, easy outs, and taps with no problem at all and Never burned the part that I was trying to save.

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Richard

10-26-2002 17:51:50




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 Re: Re: How do you.. in reply to Richard, 10-26-2002 07:13:15  
Glad to hear that some body else does this too! It works and been doing it for years.Just run a chase through it afterwards and your good to go



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Vern-MI

10-26-2002 05:59:44




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 Re: How do you.. in reply to tlak, 10-26-2002 05:47:58  
Machine shops E-LOX them out but since you probably don't have access to this machine the next best thing is to anneal the easy out using an acetylene torch and then you can drill the softened metal out of the hole. Heat it cherry red and let it air cool. This causes the metal grain growth that is required to achieve malleability or softness.



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vince

10-30-2002 18:58:11




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 Re: Re: How do you.. in reply to Vern-MI, 10-26-2002 05:59:44  
The home shop machineist web site had a long forum on this. Carbide will work if you have the mill. EDM is also ok if you have the tool or the part is worth the $. If it(broken tap or ez out) is in alunimum send it out to be anodized (chemical eats em up).

But the hands down winner for low buck, safe, no fear of loss of temper, or warping, of the part was to chuck up a chunk of copper tube in a drill press coat it up with good clover lapping (valve compound) and set the drill with a light pressure a pop bottle filled with just the right amount of water with a string aroung the feed was a favorite. The grinding compound would get inbedded in the soft copper and then grind through the hard steel of the tap test done for the sake of it "can't be done" ate through an inch of 3/8 tap in an hour and a half. Must be tube. lots of grinding stuff dilue with oil or water.

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