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Color Coding System ▉ Nonferrous metal ▉ Steel ▉ Wood ▉ Hardwood Related products Art no CUT+COOL drilling and cutting oil 0893 050 004 CUT+COOL Perfect drilling and cutting oil 0893 050 008 Cut and Cool Perfect drilling cutting paste 0893 050 010 Highly precise circular holes Legend v c cutting speed [m min] f feed [mm r] n rotation speed [rpm] The suggested cutting values are reference values and must be adapted to the respective conditions TWIST DRILL BIT ASSORTMENT HSS DIN 338 SMART STEP 19 PIECES 02 0612 ST EP - 2 0 2 2 -1 2 -0 9 - A U -1 7 8 4 6 - © Cutting values for twist drill bit HSS DIN 338 SMART STEP For dia 1 0-2 5 Material designation Tensile strength From dia 1 0 From dia 2 0 From 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 malleable 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