It's been a long time....I'm assuming a RH thread....I set the compound to just scrape the 7 degree flank and do most of the actual cutting on the 45 degree side of the thread. So, for an internal thread I set the compound over about 7 degrees to the left. It's a fragile tool; so take light cuts and take your time.
Make the male thread first if don't already have it and use it for a gauge.
I have alway's set the compound at 45.Then take your flat,5,7 and add the 45. Then grind your tool 1 degree less than the sum of the angles. Then set the flat ,5,7 to it's proper location.Set # thread's per inch.Note the tool will only cut on the advancing face as it goes down the 45.That's the way I do it.
Put a flat on the tool to match the flat on the male thread.
Last edited by drylakemachine; 12-07-2008 at 03:24 AM.