ATA International Product Catalogue

621 < 900 N < 1100 N < 1400 N < 900 N > 900 N < 10% Si > 10% Si E H I N H STEP DRILLS & TUBE AND SHEET DRILLS 3-Flat shank for: • Excellent torque transmission • No slippage in the drill chuck • This results in superior cutting output All step drills & sheets drills are available in BLUE-DUR or TiN-GOLD-coating. Coatings significantly increase the service life. S trongly recommended for difficult materials such as stainless steels and if drilling without coolants. All step drills & sheet drills come lasered with diameters in the spiral. All step drills & sheet drills are made of high-alloy steel HSS-XE for a hardness up to 68 HRC. This results in high wear resistance and service life. Step drills & sheet drills are also available spiral-fluted for: • Smooth cutting behavior • No sticking in the material • Low cutting forces • Less burrs on the work piece • Longer service life Of course, all step drills & sheet drills are CBN ground from solid material. Special cross ground. No centre-punching necessary PROPERTIES APPLICATION Steel Alu Alu Steel Steel Stainless Stainless Copper, brass, tin Plastics GRP/CRP Grey cast iron Hastelloy, Inconel, Nimonic, exotic materials Hardox 400 6 3 4 5 2 1 OPTIMAL GOOD POSSIBLE 11 Index 10 9 OIL 8 7 6 5 4 3 2 1