Removing a broken ez out

[Linh]

Your talking about a sinker(ram) edm machine. Depending on the size you can use a sinker for bigger bolt/tap and a fast hole edm for smaller ones. I use to do this all the time.

 

[fredybender]

You can drill out EZ-out, and even taps with these...They work for steel, all the way up to 63 Rc
http://www2.coromant.sandvik.com/coromant/pdf/metalworking_products_061/main_e_7.pdf

 

[Professur]

You can drill out EZ-out, and even taps with these...They work for steel, all the way up to 63 Rc
http://www2.coromant.sandvik.com/coromant/pdf/metalworking_products_061/main_e_7.pdf

Soon to be heard ... I snapped off a carbide drill while trying to drill my broken EZout ... now what

 

[Linh]

Those things don't work that great imo.

 

[e-tek]

I would use a narrow diamond or carbide burr.

Success. I ended up borrowing a ball end carbide bur from a friend. I put it in a die grinder and went on to drill right through the ez out. Thank you everyone for all your suggestions. Happy Thanksgiving.

Eric

THAT makes garfunkle the winner and smartest guy on the forum!!!

 

[plinker]

Another tip I learned the other day, Mack has a service bulliten out detailing welding a nut to the broken off exhaust manifold stud (12mm) that stays in the head and I have found that taking a burr and dimpling the stud helps the weld to "stick" better.

 

[ericg]

I second the motion for Garfunkle24. The carbide bur was the ticket.

 

[AZ_Catskinner]

Good call on the burr. I would have never thought of it since I don't have any that small. Looks like something else to add to my "stuff to own" list.

 

[pop pop]

I've broken more eazyouts than I ever removed broken studs. I won't use them ever again.

 

[DHS]

The spiral ez out is in a grade 8 bolt. The bolt is a 3/8-16. The bolt broke flush with the surrounding steel plate. The ez out is broken flush as well. I keep reading about these bits that will drill through anything. They are:

https://baddogtools.com/styled-6/styled-8/index.html
has anyone ever had any experience with these drill bits?

I see you got it out already, but I figured I would comment on the Baddog bits. I seen them in person at wood working show and they would let you drill thru just about anything. They had files, ceramic, old rotors, glass, wood, ect...

They do drill a hole, its not a nice precision hole but I can see how they could be handy in some places. They more or less grind their way thru. Perform poorly on wood but like the files, mow right thru them.

 

[csargents1546]

Had an exhaust manifold that I bust a drill bit trying to drill out a bolt. Shop foreman had me pull the manifold turn it upside down and heat it up to almost cherry red, then hit around the broken bit, they melt at a lower temp that cast iron, feel right out.
Excellent call on the carbide burr. Add that to the list of tricks.

 

[caspian65]

I second the motion for Garfunkle24. The carbide bur was the ticket.

Hey! I was the first to recommend the carbide tip burr!

 

[fredybender]

Soon to be heard ... I snapped off a carbide drill while trying to drill my broken EZout ... now what

A carbide drill has a positive rake angle at the drill point, (not good for hardened materials) and the web of the drill (the material thickness between the flutes) is also the weakest point, especially in carbide drills. The HC drills are straight single flute drills, with a neutral rake angle for hardened materials. I can just tell you, that once you try them, you will understand

 

[57JoeFoMoPar]

I've always broken them out with a center punch or chisel. Though depending on the situation sometimes it's worth the money more than my time to replace the part.

The torch is my go-to for removing broken bolts anymore, if you're good with a torch it's easy to do in say an exhaust manifold. Though I have run into a few that flat wouldn't burn out cleanly. If you do it just right, you just have to tap the manifold to get the slag to drop from the threads before you re-assemble, at worst run a thread chaser through it. At worst, you junk the part or like the time I was dumb enough to try it on a thin steel manifold, you're thankful you took the heat shield off first so the fact you blew a giant hole in it then welded it up wasn't really noticeable.

+1 on this method. I had an old friend burn one out of a cast iron cylinder head with a cutting torch. Set the torch up like you're going to cut, get the broken bolt and broken ez out red hot, then pop the air in a quick burst. It will blow the ez out and bolt back out in molten parts, without jacking up the iron. Turns out the steel of the bolt and ez out burns before the cast iron. Then just chase the threads and reassemble.

 

[Mike007]

I've broken more eazyouts than I ever removed broken studs. I won't use them ever again.

I'd like to who has successfully used an EZ-Out? I certainly haven't.

 

[ChevyEFI]

The vid it looks like it should work. When I get a lil ahead ( Bills) lol I'm goning to get a 1/4 in one.

http://www.theoriginalrescuebit.com/

First one to use one Must tell us.

I like the idea of that. But, a cheap set of diamond dremel burr bits goes a long ways compared to the pricing on a single one of those in 1/8".

I'd like to who has successfully used an EZ-Out? I certainly haven't.

I sure have. The square cut versions shaped like the Washington monument grip well. I've never found a spiral cut to work when I actually needed something out EZily.