Te c h n i c a l Guide S TA N D A R D CUTTING CONDITIONS ISO Workpiece material Grade Cutting speedVc (m/min) Pitch Threads per inch(mm)(TPI) Low carbon steels S15C, SS400, etc. SH725 50 - 200 0.2 - 1.5 127 - 16 C15, St42-1, etc. Carbon steels, Alloy steels S55C, SCM440, etc. SH725 50 - 200 0.2 - 1.5 127 - 16 C55, 42CrMoS4, etc. Free cutting steelSUH22, SUH23, etc. SH725 50 - 200 0.2 - 1.5 127 - 16 Stainless steel SUS304, etc. SH725 50 - 200 0.2 - 1.5 127 - 16 X5CrNi18-9, etc. Aluminium alloysA5056, A6061, etc. SH725 150 - 200 0.2 - 1.5 127 - 16 Copper alloyC2600, C280C, etc. SH725 100 - 200 0.2 - 1.5 127 - 16 Titanium alloysTi-6AI-4V, etc. SH725 30 - 80 0.2 - 1.5 127 - 16 Heat-resisting alloysInconel718, etc. SH725 30 - 80 0.2 - 1.5 127 - 16 Internal threading Cutting Number of passes ISO Workpiece materia Grade speed Pitch (mm) Vc (m/min) 0.5 0.75 1 1.25 1.5 Low carbon steels S15C, S20C, etc. SH730 40 - 140 6-8 8 - 10 10 - 12 12 - 15 15 - 18 C15, C20, etc. Carbon steels, Alloy steels S55C, SCM440, etc. SH730 40 - 140 6-8 8 - 10 10 - 12 12 - 15 15 - 18 C55, 42CrMoS4, etc. Prehardened steelsNAK80, PX5, etc. SH730 40 - 140 6-8 8 - 10 10 - 12 12 - 15 15 - 18 Stainless steel SUS304, SUS316, etc. SH730 40 - 140 8 10 12 15 18 X5CrNi18-9, X5CrNiMo17-12-2, etc. Aluminium alloys, copper alloysSi < 12% SH730 90 - 200 6 8 10 12 15 Reference pages: DuoJust-Cut: Inserts → 5-5, Toolholders → 5-17 - 5-18 TinyMini-Turn: Toolholders → 5-24 5-26