ATA International Product Catalogue

1499 3 Enter into the pilote hole Enter the pilot hole with low speed and without internal colling supply before 1 mm of the hole ground (max. 300 rpm and Vf = 1000 mm/min). 4 Deep hole drilling Drill to the required depth. Cutting data and cooling preassure see on pages 1490 + 1497 5 Through hole drilling 1 The cutting edge could break if you have a angular faced drill exit. 2 Reduce the feed rate to f = 0.05 mm/min – 0.1 mm/min 6 Retract the drill 1 Retacting of the hole until the depth of the pilot hole with Vf = 2000 mm/min. 2 Retracting from the pilot hole with low speed and without internal cooling supply (n = 300 rpm, Vf = 2000 mm/min.). 1 'Face drilling / Face milling' 2 Drilling a pilot hole Drill/Mill a flat surface on the work piece in the same dimension as the diameter of the hole should be or use our shallow drill 180° ref. 22 0404. 1 We recommend to use our Karnasch solid carbide high performance twist drill 22 0402 or 22 0405 in the shortest version, to place a pilot hole. 2 Please drill a precision hole between 1.5×D and 2×D, to ensure a perfect drilling process. Drilling on oblique work piece – Appliation instruction for Solid carbide twist drill < 40×D 11 Index 10 9 OIL 8 7 6 5 4 3 2 1