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02 0615 ST EP - 2 02 2-0 6-02 - A U-17 64 3 - © TWIST DRILL BIT ASSORTMENT HSS DIN 338 SMART STEP 25 PCS Cutting values for twist drill bit HSS DIN 338 SMART STEP For dia 1 0-2 5 Material designation Tensile strength Dia 1 0 Dia 2 0 Dia 2 5 v c n f n f n f from to from to from to from to General structural steels ≤ 850 Nmm 2 18 27 5732 8598 0 010 2866 4299 0 012 2292 3439 0 015 Unalloyed heattreated steels ≤ 850 Nmm 2 18 27 5732 8598 0 010 2866 4299 0 012 2292 3439 0 015 Lowalloy heattreated steels ≤ 850 Nmm 2 18 27 5732 8598 0 010 2866 4299 0 012 2292 3439 0 015 Unalloyed heattreated steels ≤ 1000 Nmm 2 15 23 4777 7324 0 008 2388 3662 0 01 1910 2929 0 012 Lowalloy heattreated steels ≤ 1000 Nmm 2 15 23 4777 7324 0 008 2388 3662 0 01 1910 2929 0 012 Alloyed heattreated steels ≤ 1000 Nmm 2 10 15 3184 4777 0 008 1592 2388 0 01 1273 1910 0 012 Nitriding steels ≤ 1000 Nmm 2 10 15 3184 4777 0 008 1592 2388 0 01 1273 1910 0 012 Tool steels ≤ 1000 Nmm 2 10 15 3184 4777 0 008 1592 2388 0 01 1273 1910 0 012 Highspeed steels ≤ 1000 Nmm 2 10 15 3184 4777 0 008 1592 2388 0 01 1273 1910 0 012 Cast iron ≤ 350 HB 15 23 4777 7324 0 008 2388 3662 0 01 1910 2929 0 012 Nodular graphite and malle - able iron ≤ 350 HB 15 23 4777 7324 0 008 2388 3662 0 01 1910 2929 0 012 Aluminium ≤ 600 Nmm 2 35 45 11146 14331 0 010 5573 7165 0 012 4458 5732 0 015 Plastics duroplastic 15 23 4777 7324 0 010 2388 3662 0 012 1910 2929 0 015 Plastics thermoplastic 15 23 4777 7324 0 010 2388 3662 0 012 1910 2929 0 015 Softwood 21 30 6688 9554 0 012 3344 4777 0 014 2675 3821 0 017 Hardwood 18 27 5732 8598 0 010 2866 4299 0 013 2292 3439 0 015 For dia 3 15-5 0 Material designation Tensile strength Dia 3 15 Dia 4 0 Dia 5 0 v c n f n f n f from to from to from to from to General structural steels ≤ 850 Nmm 2 18 27 1819 2729 0 017 1433 2149 0 02 1146 1719 0 025 Unalloyed heattreated steels ≤ 850 Nmm 2 18 27 1819 2729 0 017 1433 2149 0 02 1146 1719 0 025 Lowalloy heattreated steels ≤ 850 Nmm 2 18 27 1819 2729 0 017 1433 2149 0 02 1146 1719 0 025 Unalloyed heattreated steels ≤ 1000 Nmm 2 15 23 1516 2325 0 015 1194 1831 0 018 955 1464 0 021 Lowalloy heattreated steels ≤ 1000 Nmm 2 15 23 1516 2325 0 015 1194 1831 0 018 955 1464 0 021 Alloyed heattreated steels ≤ 1000 Nmm 2 10 15 1011 1516 0 015 796 1194 0 018 636 955 0 021 Nitriding steels ≤ 1000 Nmm 2 10 15 1011 1516 0 015 796 1194 0 018 636 955 0 021 Tool steels ≤ 1000 Nmm 2 10 15 1011 1516 0 015 796 1194 0 018 636 955 0 021 Highspeed steels ≤ 1000 Nmm 2 10 15 1011 1516 0 015 796 1194 0 018 636 955 0 021 Cast iron ≤ 350 HB 15 23 1516 2325 0 015 1194 1831 0 018 955 1464 0 021 Nodular graphite and malle - able iron ≤ 350 HB 15 23 1516 2325 0 015 1194 1831 0 018 955 1464 0 021 Aluminium ≤ 600 Nmm 2 35 45 3538 4549 0 016 2786 3582 0 020 2229 2866 0 025 Plastics duroplastic 15 23 1516 2325 0 016 1194 1831 0 020 955 1464 0 025 Plastics thermoplastic 15 23 1516 2325 0 016 1194 1831 0 020 955 1464 0 025 Softwood 21 30 2123 3033 0 018 1672 2388 0 023 1338 1910 0 028 Hardwood 18 27 1819 2729 0 017 1433 2149 0 022 1146 1719 0 027