839 Cutting speed (m/min) 450 600 650 750 (mm) Rotational speed (rpm) 2 72,000 95,000 104,000 120,000 3 48,000 64,000 68,000 80,000 4 36,000 48,000 52,000 60,000 6 24,000 32,000 34,000 40,000 8 18,000 24,000 26,000 30,000 10 14,000 19,000 21,000 24,000 12 12,000 16,000 18,000 21,000 16 9,000 12,000 14,000 17,000 Material groups Application Cutting speed m/min Steel, cast steel Non-hardened, non-heat treated steels up to 1200 N/mm2 (< 38 HRC) Construction steels, carbon steels, tool steels, non-alloyed steels, case-hardened steels, cast steels Fine machining = medium stock removal 650–750 Hardened, heat-treated steels exceeding 1200 N/mm2 (> 38 HRC) Tool steels, tempering steels, alloyed steel, cast steels 450–600 Stainless steel (INOX) Rust- and acid-resistant steels Austenitic and ferritic stainless steels Fine machining = medium stock removal 450–600 Non-ferrous metals Hard-non-ferrous metals Bronze, titanium/titanium alloys, hard alu-alloys (high Si content) Fine machining = medium stock removal 450–600 High-temperature resistant materials Nickel based alloys, cobalt based alloys (aircraft engine and turbine construction) Cast iron Grey cast iron, white cast iron Cast iron with flake graphite EN-GJL, with nodular graphite cast iron EN-GJS, white annealed cast iron EN-GJMW, black cast iron EN-GJMB Fine machining = medium stock removal 650–750 CUT SPECIFICATION K-CUT ® 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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