ATA International Product Catalogue

1496 5,000 1 2 3 4 5 6 7 8 9 10 11 12 10,000 15,000 20,000 = 125 = 170 = 200 = 220 = 250 l3 l3 l3 l3 8,000 l3 l3 = 100 l3 CONTACT INFORMATION For more information please call +353 49 435 2138 or send an email to ask@atagroup.ie The drill speed is dependent on the diameter and protection length l3 Excessive drill speeds could result in the tool breaking through the centrifugal force created. You should avoid drastically increasing the speed of the drill from the outset, as well as abruptly changing the direction of these long, slender tools. Karnasch therefore recommends that you do not exceed the critical speed ranges (see the tables). Example: Diameter d1 = 10 mm Effective length l3 = 220 mm Critical rpm range max. 8,000 rpm Coolant flow rate / Emulsion Information for the use of Karnasch solid carbide drills with interior cooling supply <40×D Drilling strategy from Karnasch – VHM drill bits up to 12 mm in diameter and in excess of 18×D protection length l3 0.5 3.5 Tool diamter mm 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 10 20 30 40 50 60 Oil consumption (ml/h) Air consumption (m 3 /h) 3.5 Tool diamter mm Volume rate 4 5 6 7 8 9 10 11 12 13 14 15 16 5 10 15 20 25 Emulsion or Oil (l/min) Minimum cooling pressure 50 bar Cooling quantity with minimal quantity lubrication Cooling quantity with conventional cooling 70 80 90 100 110 20 17 18 19 20 d1 d2  10 Bar 20 Bar 30 Bar 40 Bar 50 Bar 60 Bar 6 3.0 - 6.0 0.20 0.6 0.9 1.1 1.3 1.4 1.6 6 3.0 - 6.0 0.50 1.6 2.3 2.8 3.2 3.6 3.9 8 6.1 - 8.0 1.00 3.2 4.5 5.5 6.4 7.1 7.8 10 8.1 - 10.0 1.40 4.5 6.3 7.7 8.9 10.0 11.0 12 10.1 - 12.0 1.60 5.1 7.2 8.9 10.2 11.4 12.5 14 12.1 - 14.0 2.00 6.4 9.0 11.1 12.8 14.3 15.6 16 14.1 - 16.0 2.50 8.0 11.3 13.8 16.0 17.9 19.6 18 16.1 - 18.0 2.80 8.9 12.6 15.5 17.9 20.0 21.9 20 18.1 - 20.0 3.00 9.6 13.5 16.6 19.2 21.4 23.5 25 20.1 - 25.0 3.00 9.6 13.5 16.6 19.2 21.4 23.5 32 25.1 - 32.0 3.00 9.6 13.5 16.6 19.2 21.4 23.5 Tool diamter mm rpm Effective length 11 Index 10 9 OIL 8 7 6 5 4 3 2 1