Page 11 of Gun Drills by Stock Precision Tools

single-fluted gun drills with interchangeable insert type tbe-wp value lubricant volume 80 30 value lubricant pressure neat oil soluble oil volume of flow q in l/min 70 pressure p in bar 20 25 30 35 40 25 60 20 50 15 40 10 15 15 20 25 30 35 40 tool-Ø mm tool-Ø mm cutting parameters for al-alloys acc to si-content cast iron ggg gtw gts structural and free cutting steels heat-treatable steels case hardened steels nitriding steels stainless steels 20 value cutting speeds 0.18 0.16 feed rate f mm/rev 0.14 0.12 0.10 0.08 0.06 0.04 40 60 80 100 200 value feed rates 15 20 25 30 35 40 cutting speed vc m/min tool-Ø mm gun drills 11

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