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Orig. Hartner
TOP line. In HSS-E steel, particularly treated for superior performance and long life. Ground and polished after hardening. Cutting geometry optimized for maximum chip evacuation.
Reinforced shank (from 7/16 inches, reduced shank), with 40° helix for deep through holes. Thread: American - UNC pitch - ANSI-B1.1 (DIN 371/376). Tolerance 2B. Right-hand use. TiAlN coated. For all types of steels, also for hardened non-alloy steel, stainless steel, nitrided steel, non-oxidizable and antacid steel up to 1000 N / mm2, aluminum, its alloys and long-chipping metals.
For Ø holes for tapping see technical tables and tips Art. 8400 G - 8500 G.