• HSS Fluteless (Roll Form) Taps.
  • Fluteless taps are also referred to as “Roll Form” or “Thread Flow” taps.
  • Unlike standard taps, fluteless taps create internal threads by pressure deformation, rather than by material removal.
  • As a result, no chips are formed as no material is removed.
  • The thread is formed by the tap in the ductile material creating threads that have a smoother surface and greater tensile strength under dynamic stress than cut threads.
  • It is essential to use a high quality lubricating fluid when using fluteless taps.
  • Materials with a minimum elongation of 5% and a tensile strength no greater than 1,000 N/mm2 are suitable for thread forming.
  • Metric Coarse angle of thread is 60 degrees.
  • The crest is flat and the thread has clearance at the root allowing external thread and internal thread to engage well.
  • Larger root radius and lower thread height enable easy screw thread processing and increase thread screw strength.
  • Recommended tapping drill: 1.8mm