Rolling of external threads Bianco Gianfranco
thread of course with rollers of a given thickness can roll all the threads with a length less than the thickness itself Tab N 176 1 Approximate number of revolutions of the piece to form the thread Thread per inch Pitch in mm Brass Alluminum Steel with C or alloyed HRc 15 Steel with C or Cr or stainless HRc 20 32 0 75 10 – 15 11 – 18 14 – 23 24 1 00 11 –17 13 – 20 16 – 25 18 1 50