I have done this for rethreading and it works okay. I do think that a block
would work better if you have a suitable surface.
Don Young
Ken Sterling (Ken Sterling) wrote in message
...
Gang,
Quick question.... possible situation ... need to tap a hole in, say
1/2" plate, through to the other side, but needs to be "perfectly
aligned" and say the plate is mounted on a piece of machinery that
can't be moved to another location and the tapping has to be done by
hand. Possible solution - is it possible, (or has anyone ever done
this), by grinding a "pilot" on the front end of that tap and then
relieving the cutting edges again to look almost like factory just
behind the end of the pilot? Is this a viable concept?
Ken.