Grade - Quick Guide Application ranges of Application ranges of G-tolerance positive M-tolerance negative turning inserts turning inserts High speed High speed GT9530 ( > 150)Steel ( > 150) NS9530 T9205 Medium speed(80 < 150)SH725 Medium speedAH725(80 < 150) T9215T9225 T9235 Low speed J740( < 80) Low speed AH120( < 80) AH645 Continuous Light interrupted Heavy interrupted Continuous Light interrupted Heavy interrupted High speed High speed ( > 150)Stainless ( > 150) T6120 T6130 Medium speed Medium speed (80 < 150) SH725 AH725 (80 < 150) Low speed J740 Low speed AH8015 AH645 ( < 80) ( < 80) Continuous Light interrupted Heavy interrupted Continuous Light interrupted Heavy interrupted High speed DX110 High speed ( > 150)Non-ferrousDX120 ( > 150) DX140 Medium speed Medium speed (80 < 150) (80 < 150) KS05FLow speedTH10 Low speed TH10 ( < 80) ( < 80) Continuous Light interrupted Heavy interrupted Continuous Light interrupted Heavy interrupted High speed High speed ( > 150) ( > 150) Superalloy BX480 Medium speed Medium speed (80 < 150) (80 < 150) Low speed( < 80) AH8005SH725AH8015 Low speed AH8005AH8015( < 80) Continuous Light interrupted Heavy interrupted Continuous Light interrupted Heavy interrupted High speed BXA10 High speed BXA10 ( > 150) ( > 150) Hardmaterial BXA20 BXA20 Medium speed Medium speed (80 < 150) (80 < 150) Low speed TH10 Low speed TH10 ( < 80) ( < 80) Continuous Light interrupted Heavy interrupted Continuous Light interrupted Heavy interrupted 1-2