In a G76 2 block threading cycle I understand that in the first line the last 2 digits of the "P010029" are the infeed angle but there are a couple things I'm not quite sure about. If those last digits are 29 does that mean you are feeding in at 29 degrees and cutting 1 degree on the backside of the insert on a 60 degree thread? If so, what is the the 55 or 60 designation used for? What is the difference between the 30 and the 60 because some things I read seam to say they both would feed in at a 30 degree meaning you are rubbing the back side of the insert on a 60 degree thread. I would appreciate some clarification....