The main elements of an auger are the following:
ß = Angle of the propeller. It is the angle formed by the tagent to the fillet with a plane perpendicular to the axis of the screw
Ph = Propeller pitch. It is the distance between two threads belonging to the same fillet, measured in the axial direction. This step is the one that interests the turner to calculate the wheels to put in the lyre.
Px = Axial pitch. It is the distance between two consecutive threads, measured in the axial direction.
Pn = Normal step. It is the distance between two consecutive threads, measured according to a normal plane to the fillet. This step corresponds to a module m, which is considered for calculation purposes.
n = Number of entries. It is the number of carved steaks.