Thread: FUBAR - again - How to drill carbide?

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Wire EDM .................

You may be able to slowy chip it out, but probably trash the threads doing it ...........

Good Luck, Kitz

Yep, Kitz is right, I just had to do it a couple weeks ago. Kept chipping and turning it slightly with very small chisels until the ez out came out, but the threads were buggered up, so I had to retap.

Might be better ways, but this was the only one I knew of. It is one of those frustrating jobs that make a Preacher cuss.


Don

Kitz is right....if the part is relatively easy to carry, take it to a
machine shop that burns out taps...they do it regularly. It may
not affect the threads but you can always install a helicoil.

Also, most ez-outs are not carbide....a carbide piece would be
pretty expensive......usually they are just harder than heck.
You might try a real carbide drill if you can get it started. A real
carbide drill (not a carbide coated cheapo) is available from the
big supply houses. You'll have to have a good flat starting spot and
you will probably not be able to center punch the starting location.

the true carbide, really tough, is also very brittle

I think it is carbide - it looks like file material where it broke off.

I have beat on it with a center punch, breaking off small pieces, to where it has a pretty good drill starting point now. But I don't have a bit that will chew on it.

I'm going to try a carbide bit next.

Cleveland Twist Drill lists their EZY OUT as being made of tool steel, not carbide. Greenfield lists theirs as tool steel also.....couldnt find a
carbide ezy out in the typical catalogs.....Sears stuff is ABSOLUTELY not
cabide....carbide is heavy, you notice it when you pick up a carbide drill or end mill.

mike in tucson

Cool - if they're tool steel, the carbide bits should get it.

Thanks - Bert

Hope you can set it up in a mill or drill press where you can
control the perpendicularity and pressure....use some cutting
oil on the bit. You just wish they sold an EZY OUT EZY OUT!!!