Your 0.545 pass will not do anything because the tool is aligned with the root of the thread not the crest. If you want to skim the crest you need to move you Z starting point by half a pitch.
But I don't quite understand what you are trying to get by skimming with a threading tool, surely you need something with a flat end such as a narrow grooving tool?
Of course the best approach is to use a full profile thread insert.
__________________
An open mind is a virtue...so long as all the common sense has not leaked out. |