I cannot reach the back side of the hole as it is a blind hole. I would love to build the edm, just didn't want to use it for this. If I use the edm, what happens when the tap material is gone? Are there threads left?
I know the tap was jammed at the bottom of the hole as I heard the tap "tink" then it was jammed and would not retract. It seemed to come loose, then without any resistance, broke off flush.
I seldom ever have any problems with hand taps but you know how it goes with the importance and care given to the project, things seem to happen expotentially. I will try the carbide end mill first, Thanks guys. |