
Cutting speed Pitch Threads per inch
ISO Workpiece material Grade V (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 steel SH725 50 - 200 0.2 - 1.5 127 - 16
SUH22, SUH23, etc. Stainless steel
SUS304, etc. SH725 50 - 200 0.2 - 1.5 127 - 16
X5CrNi18-9, etc.
Aluminium alloys SH725 150 - 200 0.2 - 1.5 127 - 16
A5056, A6061, etc.
Copper alloy SH725 100 - 200 0.2 - 1.5 127 - 16
C2600, C280C, etc.
Titanium alloys SH725 30 - 80 0.2 - 1.5 127 - 16
Ti-6AI-4V, etc.
Heat-resisting alloys SH725 30 - 80 0.2 - 1.5 127 - 16
Inconel718, etc.
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 steels SH730 40 - 140 6 - 8 8 - 10 10 - 12 12 - 15 15 - 18
NAK80, PX5, etc. Stainless steel
SUS304, SUS316, etc. SH730 40 - 140 8 10 12 15 18
X5CrNi18-9, X5CrNiMo17-12-2, etc.
Aluminium alloys, copper alloys SH730 90 - 200 6 8 10 12 15
Si < 12%