Каталог Stellram токарный инструмент - страница 249

Заказ инструмента: http://steelcam.org Threading Technical 8 (343) 382-52-03 | sales@sverla-ekb.ru Naming Nomenclature Depth of Thread Threading Thread Angle Helix Angle External Major Ø Pitch Ø Minor Ø Internal Thread Thread Pitch Root Crest Depth of Thread Depth of Thread Major Diameter The distance between the Crest and Root. The largest diameter of the thread form. Pitch Minor or Root Diameter The distance between two thread form peaks, defined The smallest diameter of the thread form. as TPI (thread per inch) in millimeters or as an inch decimal. Thread Angle The included angle between the individual flanks. Pitch or Effective Diameter Is where the theoretical cylinder diameter cuts the Root thread form, when the thread form width and groove The inner most surface of the thread, connecting the depth are equal, applies to parallel/straight threads flanks. forms only. Crest Helix Angle: (Parallel/Straight Thread Forms) The outer most surface of the thread, connecting the Where the lead of the thread and the pitch diameter flanks. cylinder form a right angle triangle. The helix angle is the angle opposite the lead. Helix Angle πxD P D = Pitch/Effected Diameter P = Pitch or Lead π x Pitch Diameter φ = Helix Angle D C248 www.kennametal.com