I have some questions about grinding a hhs thread cutting tool. First, I have very little knowledge about grinding tools. When I was a machine shop student at the vo-tech many years ago we had to make a nut and bolt and cut the threads for the bolt. We had to grind the blank for the 60 degree angle but we were taught to only grind the blank on one side, not both. If I remember correctly it was said you were only having to deal with grinding and keeping straight one edge not 2. We also did not grind any off of the top of the blank(rake?). We were using these in a lantern tool post.
Over the years I have not seen a thread tool ground like this. They always seem to have both sides ground with the point in the middle and the top ground. Is the way I was taught a long time ago an acceptable way of doing it?