Milling Center drill VDP Feed : f (mm/rev) ISO Workpiece material Hardness Cutting speedVc (m/min)VDP107VDP165 VDP207 VDP324 / VDP409 / VDP509 /VDP328VDP412VDP513VDP641 Carbon steelS45C, S55C, etc.C45, C55, etc.- 300 HB40 - 80 0.02 -0.04 0.025 - 0.025 - 0.04 -0.050.050.080.05 - 0.10.05 - 0.1 0.06 -0.12 Alloy steelSCM440, SCr420, etc.42CrMo4, 20Cr4, etc.- 300 HB30 - 500.02 -0.040.025 - 0.025 - 0.04 -0.050.050.080.05 - 0.10.05 - 0.1 0.06 -0.12 Prehardened steelPX5, NAK80, etc.30 - 40 HRC 20 - 30 0.02 -0.04 0.025 - 0.025 - 0.04 -0.050.050.080.05 - 0.10.05 - 0.1 0.06 -0.12 Stainless steelSUS304, SUS316, etc.- 200 HB 15 - 25X5CrNi18-9, X5CrNiMo17-12-2, etc.0.015 -0.02 -0.030.040.02 -0.040.04 -0.080.05 - 0.10.05 - 0.10.06 -0.12 Grey cast ironFC250, FC300, etc.150 - 250 HB 60 - 100250, 300, etc., GG250, GG300, etc.0.02 -0.040.025 -0.050.025 -0.050.05 -0.090.07 -0.0120.07 -0.120.12 - 0.18 Ductile cast ironFCD450, etc. 150 - 250 HB 60 - 100450-10S, etc., GGG450, etc.0.02 -0.040.025 -0.025 -0.04 -0.050.050.080.05 - 0.10.05 - 0.10.1 - 0.15 Titanium alloysTi-6Al-4V, etc. - 15 - 25 0.01 -0.02 0.01 -0.02 0.015 - 0.04 -0.030.070.04 -0.07 0.04 -0.07 0.04 -0.07 Heat-resistant alloysInconel 718, etc.- 10 - 20 0.01 -0.02 0.01 -0.02 0.015 - 0.03 -0.030.060.03 -0.06 0.03 -0.06 0.03 -0.06 Hardened steelSKD6, SKT4, etc.40 - 50 HRC 15 - 25 -55NiCrMoV7, etc.- - 0.04 - 0.04 - 0.04 - 0.04 -0.070.070.070.07 Hardened steelSKD11, SKH51, etc.50 - 60 HRC 10 - 20 -HS6-5-2, etc.- - 0.03 - 0.03 - 0.03 - 0.03 -0.060.060.060.06 Tungaloy 137