Page 9 of Gun Drills by Stock Precision Tools

tool material stc head carbide grade order number discount group surface finish k15 75019 123 bright drilling depth up to 30 x d d2 l3 l1 l2 nom Ø d1 h5 driver Ø d2 total length l1 flute length l2 driver length l3 8.00 10.00 12.00 values cutting speeds 16 20 20 330 390 450 282 340 400 48 50 50 values feed rates cutting parameters for d1 0.3 0.2 0.1 cast iron ggg gtw gts 0 50 100 150 200 250 0 5 10 20 25 25 27 cutting speed vc m/min detailled cutting parameters see on pages 18/19 tool-Ø mm values lubricant pressure 60 50 40 30 20 10 neat oil soluble oil 90 75 volume of flow q in l/min 60 45 30 15 values lubricant volume pressure p in bar 5 10 15 20 25 30 5 10 15 20 25 feed rate f mm/rev 30 al-alloys acc to si-contentl short chipping non-ferrous metals 0.4 tool-Ø mm tool-Ø mm gun drills 9

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