ATA International Product Catalogue

220520 220525 1500 0 10 20 30 40 50 60 70 80 90 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CONTACT INFORMATION For more information please call +353 49 435 2138 or send an email to ask@atagroup.ie 2 cutting edges, spiral type. Flow is dependent on pressure (bar) and diameter of coolant holes. Karnasch solid carbide twist drill is used turning and non turning on all modern manufacturing machines. By drilling in turning parts please watch the corresponding centres of drill and part. It is possible to increase the feed rate up to 30-50% by drilling with interior cooling supply and a cooling pressure of 50-60 bar. Coolant flow for drills with twisted interior coolant supply Coolant pressure in dependence from the tool-diameter/drill 3×D - 50×D very good good bad Bar Diameter tool Recommended cutting data for Karnasch solid carbide drills and core drill, 3 cutting edges Shank Drill diameter Coolant hole diameter Flow rate l/min. 20 bar 30 bar 40 bar 50 bar 6 mm 4.0 - 6.0 mm 0.6 mm 1.4 1.6 2.0 2.2 8 mm 6.1 - 8.0 mm 0.9 mm 2.8 3.5 4.0 4.5 10 mm 8.1 - 10.0mm 1.2 mm 5.1 6.0 7.2 8.0 12 mm 10.1- 12.0 mm 1.3 mm 6.0 7.5 8.5 9.5 14 mm 12.1- 14.0mm 1.6 mm 9.0 11.0 12.5 14.0 16 mm 14.1- 16.0mm 2.0 mm 14.0 17.0 20.0 22.0 18 mm 16.1- 18.0mm 2.2 mm 17.0 21.0 24.0 27.0 20 mm 18.1- 20.0mm 2.5 mm 22.0 27.0 30.0 35.0 EN - GJV 250 (GGV 25) EN - GJV 350 (GGV 35) EN - GJV 400 (GGV 40) EN - GJV 500 (GGV 50) Si Mo 6 0.7040 / GGG 40 0.7050 / EN-GJS-500-2 (GGG50) 0.7070 / EN-GJL-700-2 (GGG70) 60 - 90 0.02 - 0.04 0.03 - 0.10 0.08 - 0.14 0.10 - 0.20 0.8035 / EN-GJMW-350-4 (GTW35) 7.3 – 7.4 – 7.5 – 7.6 0.8170 / EN-GJMW-700-2 (GTS70) 3 - 5 5 - 7 7 - 10 12 Material group Cutting speed Recommended feed rate (mm per rev.) based diameter range Vc m/min 0.6010 / EN-GJL-100 (GG10) 0.6020 / EN-GJL-200 (GG20) 7.1 – 7.2 0.6025 / EN-GJL-250 (GG25) 90 - 120 0.02 - 0.05 0.04 - 0.10 0.10 - 0.15 0.12 - 0.20 0.6030 / EN-GJL-300 (GG30) 0.6035 / EN-GJL-350 (GG35) 0.6040 / EN-GJL-400 (GG40) 11 Index 10 9 OIL 8 7 6 5 4 3 2 1