Application information chamfer forms WALTER Prototyp Number of threads Design Form in the chamfer of the flutes Used predominantly for A 6-8 thr

Application information chamfer forms WALTER Prototyp Number of threads Design Form in the chamfer of the flutes Used predominantly for A 6-8 threads straight flute Through holes in medium-to long-chipping materials B 3.5-5 threads straight flute with spiral point Through holes in medium-to long-chipping materials C „ 2-3 threads Uaaamwwwwv straight-fluted or spiral-fluted Blind holes in long- and medium-chipping materials and through holes in short-chipping materials 3.5-5 threads straight-fluted or spiral-fluted (15° Blind holes with long thread runout and through holes D 1.5-2 threads straight-fluted or spiral-fluted Blind holes with short thread runout E 1-1.5 threads straight-fluted or spiral-fluted Blind holes with very short thread runout F Please note Shorter chamfers produce thread depths close to the bottom of the hole. Longer chamfers reduce the strain on the cutting edge, which becomes more significant with increasing material strength. Longer chamfers increase the overall torque required. D 445 Technical information threading