I am trying RFT Tap (SPPT) in steel material for the through-hole application. But it keeps breaking from the shank. I have tried several countermeasures. Cutting parameters, Flute polishing but problem not resolved. Tap size is M10x1 and it is PM Tap with TICN coating.
Please suggest any countermeasures I can take.
Please suggest any countermeasures I can take.