Каталог Iscar вращающийся инструмент 2017 - страница 722

USER GUIDE TAPS Tap Nomenclature and Standards DIN 371 DIN 376 L5 L3 Cf d4 d2 L6 d4 D d3 D d3 L1 L4 L2 Cm L1 L4 L2 S L L D Major diameter L Total length d2 Shank diameter L1 Thread length d3 Chamfer diameter L2 Shank length d4 Neck diameter L3 Square length L4 Neck length L5 Chamfer length L6 Flute length S Square size Cm Center male L Total length Chamfer Lead Forms According to DIN 2197 Cf Center female 6-8 threads A Form A Long, 6-8 threads for short through holes. 3.5-5 threads Form B B Medium, 3.5-5 threads, with spiral point for all through holes and deep tapping holes. 2-3 threads Form C C Long, 2-3 threads for blind holes and generally for aluminum grey cast iron and brass. 3.5-5 threads Form D D Medium, 3.5-5 threads for through and blind holes with sufficient runout. 1.5-2 threads Form E E Extremely short, 1.5-2 threads for blind holes with little runout depth. Avoid use if possible. 1-1.5 threads Form F Extremely short, 1-1.5 threads F for blind holes with little runout depth. Avoid use if possible. Chamfer Lead Length for Sets of 3 Hand Taps ca. 6 threads ca. 4 threads ca. 2 threads First taper tap Second tap Bottoming tap 718 718 ISCAR ISCAR