Hi Norm, all,

Sorry for not getting back sooner.




Yes and no. I believe the threads in the block were rolled, not cut, so it was nearly impossible to not remove material.

It also wasnt the taps fault because I should have known better.

Andrew

Taps are self centering by design.

If you used cutting oil and kept the chips blown out, you should have cut into the root, and at worst, only polished the flanks.


Not where I was going. Are you sure there was no problem with the casting or threads, going in?

Did you use a tap because you were in a hurry?

Norm

I didn't use any oil. That could have been the problem.



No. At that point, I didnt know there was a difference between a tap and a chaser.

I don't know that I did either, until you brought it up.

Norm