Internal Threading

[Mitch Alsup]

1. on the point of spelling, the language is English, so therefore, the English spelling should be the preferred method.

So color should be spelled colour ??
And liter should be spelled Litre because it was originally French ??

 

[Illinoyance]

Threading RH, LH, internal, external, spindle in reverse, tool inverted, etc, there is one rule that always works: the compound should be parallel with the trailing flank of the tool. Actually the trailing face of the tool should shave a little off the thread so 1/2* off parallel is the right compound setting. Those of you that plunge feed can ignore what I wrote.