PDD
Heliman
Location: Medina Ohio USA
My Posts This: Topic Forum | Drilled out broken ez-outJust had the problem and it can be done. You need some time and proper tools.
I broke off a Mac tools spiral ez-out in a 1/4-20 bolt I had broken off in my wood burning stove door.
Go to a machine tool supply shop, you will need carbide tools. Or you can order them on line. I bought a 1/8 and 3/16 carbide drill bits, also a couple 1/8 shaft carbide cutters with odd shapes.
One was a sort of ball head, my ez-out was broken at an angle and trying to center punch them can be a pain. I wanted to make a mark to guide the bit. The other was shaped sort of drill like but with more flutes than a conventional drill bit all the way to the bottom.
The ball shaped cutter did more than make a mark on the ez-out I was able to drill right through it using a 14.4 Craftsman cordless drill at the kitchen table. Dear wife wasn`t home.
Then I took the door out to the barn and clamped the drill shaped cutter in the bench drill and used it to enlarge the hole, it will side cut with steady pressure.
Once it was cutting easily like the remains of the ez - out was gone I just centered the hole and ran a couple of progressively larger drill bits through the hole and then a tap to clean out any remaining metal.
I didn`t even need to use the carbide drill bits, just the odd shaped ones, they were like 6 bucks a piece at the local machine tools supply shop.
Wood burner is like 19 years old and trying to find a replacement door was too much work, and to replace the wood burner now is around 1500 bucks.
The carbide tools are very brittle, you don`t want to be in a hurry, or use too much force. |
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