® Mini Chamfer and Countersink Countersink Cutting Data Cutting Speed Feed ISO Materials Class Vc d fz (m/min) mm/tooth Low & Medium Carbon Steels <0.55%C 120 - 240 Ø3-Ø4 0.04 - 0.06 P High Carbon Steels ≥0.55%C 80 - 180 Ø5-Ø6 0.05 - 0.07 Alloy Steels, Treated Steels 50 - 120 Stainless Steel-Free Cutting 70 - 100 Ø8 0.06 - 0.08 M Stainless Steel-Austenitic 60 - 140 Ø10 0.07 - 0.10 Cast Steels 70 - 100 Ø12 0.08 - 0.15 K Cast Iron 80 - 160 Aluminum ≤6%Si, Copper 150 - 500 N Aluminum >6%Si 100 - 250 Synthetics, duroplastics, thermoplastics 80 - 200 S Nickel alloys, Titanium alloys. 30 - 90 Hardened Steel, 45-50 HRc 60 - 70 H Hardened Steel, 51-58 HRc 50 - 60 B15-10