ATA International Product Catalogue

1498 CONTACT INFORMATION For more information please call +353 49 435 2138 or send an email to ask@atagroup.ie 1 Drilling a pilot hole 2 Enter into the pilote hole 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. 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). Blind hole drilling – Appliation instruction for Solid carbide twist drill < 40×D 3 Deep hole drilling 4 Retract the drill Drill to the required depth. Cutting data and cooling preassure see on pages 1490 + 1497 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.). 11 Index 10 9 OIL 8 7 6 5 4 3 2 1