ATA International Product Catalogue

220390 1497 We recommend that you drill a pilot hole when using series 22 0390 high- speed, deep hole drill bits. Preferentially you should use a tool with 3×D drilling depth (22 0405), or alternatively up to 5×D drilling depth with internal cooling. The point angle of 140° as well as the diameter tolerance m7 are aligned. A minimum coolant pressure of 20-30 bar is sufficient. Now drill using the 22 0390 series (approx. 1-2×D), with a reduced feed rating and cutting speed of approx. 40-50% of the recommended value. Then increase the feed rating and the cutting speed, without interruption, to the recommended benchmarks. The drilling strategy should be conducted with- out ventilation of interrupting the feed rate. After reaching the desired drilling depth, the drill speed should be reduced to approx. 30% in order to extract the drill from the hole. The drill being com- pletely still can be an advantage in extreme cases. Our regrinding service ensures short delivery times and a 100% lifetime guarantee. Recommended cutting conditions for Karnasch solid carbide drills <40×D EN-GJS-800-8 (ADI800) 0.10 0.12 0.13 0.16 0.20 0.22 0.25 ADI EN-GJS-1000-5 (ADI1000) 800 - 1400 N EN-GJS-1200-2 (ADI1200) Vc 70 - 90 EN-GJS-1400-1 (ADI1400) 0.12 0.15 0.16 0.20 0.25 0.28 0.30 EN-GJV250 (GGV25) EN-GJV350 (GGV35) 0.12 0.15 0.16 0.20 0.25 0.28 0.30 7.3 EN-GJV400 (GGV40) EN-GJV500 (GGV50) Vc 80 - 100 Si Mo 6 0.16 0.18 0.20 0.25 0.32 0.38 0.40 0.7040 / GGG 40 7.3 0.7050 / EN-GJS-500-7 (GGG50) 0.12 0.15 0.16 0.20 0.25 0.28 0.30 7.4 0.7070 / EN-GJS-700-2 (GGG70) 7.5 0.8035 / EN-GJMW-350-4 (GTW35) Vc 80 - 100 7.6 0.8170 / EN-GJMW-700-2 (GTS70) 0.16 0.18 0.20 0.25 0.32 0.38 0.40 0.6010 / EN-GJL-100 (GG10) 0.6020 / EN-GJL-200 (GG20) 0.12 0.15 0.16 0.20 0.25 0.28 0.30 7.1 0.6025 / EN-GJL-250 (GG25) 7.2 0.6030 / EN-GJL-300 (GG30) Vc 90 - 120 0.6035 / EN-GJL-350 (GG35) 0.16 0.18 0.20 0.25 0.32 0.38 0.40 0.6040 / EN-GJL-400 (GG40) 1.1750 / C75W 1.2067 / 102 Cr 6 0.08 0.10 0.11 0.12 0.15 0.18 0.20 1.2080 / X210 Cr 12 2.1 1.2083 / X42 Cr 13 1.2343 / X38 Cr Mo V5 Vc 60 - 80 1.2419 / 105 WCr 6 0.16 0.18 0.20 0.25 0.30 0.35 0.40 1.2767 / X45Ni Cr Mo 4 1.8540 / 34 Cr Al 6 0.08 0.10 0.11 0.12 0.15 0.18 0.20 2.2 1.8519 / 31 Cr MoV 9 1.8550 / 34 Cr Al Ni 7 Vc 70 - 90 0.16 0.18 0.20 0.25 0.30 0.35 0.40 1.5752 / 14 Ni Cr 14 0.08 0.12 0.14 0.16 0.20 0.25 0.27 2.1 1.7043 / 38 Cr 4 2.2 1.7131 / 16 Mn Cr 5 Vc 70 - 90 1.7264 / 20 Cr Mo 5 0.15 0.18 0.20 0.25 0.30 0.35 0.40 50 Mn Si 3 36 Ni Cr 6 0.08 0.12 0.14 0.16 0.20 0.25 0.27 1.3 38 Cr 2 28 Cr 4 Vc 80 - 100 41 Cr 4 0.15 0.18 0.20 0.25 0.30 0.35 0.40 42 Cr Mo 4 C22 C45 C60 0.08 0.12 0.14 0.16 0.20 0.25 0.27 1.2 C30E C45E Vc 80 - 100 C 60 E 100 Cr Mn 6 0.15 0.18 0.20 0.25 0.30 0.35 0.40 43 Cr Mo 4 3.0 4.0 5.0 6.0 8.0 10 12 Material group Example DIN-EN Cutting speed Vc m/min Recommended feed rate (mm per rev.) based diameter range 115 Mn Pb 30 46 S 20 0.08 0.12 0.14 0.16 0.20 0.25 0.27 1.1 60 S 20 115 Mn 37 Vc 80 - 110 46 Pb 20 0.15 0.18 0.20 0.25 0.30 0.35 0.40 TOOLOX 33 Vc 40 - 50 0.08 0.10 0.15 0.18 0.20 0.22 0.25 HB 280-330/≈27-33 HRC TOOLOX 44 Vc 30 - 40 0.08 0.10 0.14 0.16 0.18 0.20 0.22 HB 410-475/≈41-47 HRC Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. 11 Index 10 9 OIL 8 7 6 5 4 3 2 1