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...
I am using 2 flute end mill on aluminum. Dia 9mm for plunging operation. But having cutter mark on the start of the hole.
End mill is uncoated 45 degree helix.
Please suggest some solution to resolve the issue
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