Transcription of THREAD CUTTING & FORMING
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THREAD CUTTING & FORMING
THREAD CUTTING & FORMINGT hreading, THREAD CUTTING and THREAD Rolling:MachiningThreads on External Diameters (shafts)Tapping:MachiningThreads on Internal Diameters (holes)Size:Watch to 10 shaftsStraight Threads:Threads on cylindrical surfaces, ex. fastenersConical Threads:Threads on conical surfaces, ex. Pipe jointsMethods: THREAD Rolling-small and standard parts, ductile materialsThread CUTTING , THREAD THREAD applications:-fasteningSpecial THREAD applications:-to transmit motion-to transmit power-to measure-to connect pipesStandards: Unified ( american )-dim. in inches,pitch in Threads Per Inch (TPI)ISO (Metric)-dim. in mm or inches,pitch in mmTypes:UNC/NC: Coarse THREAD Regular use not subjected to vibration/SeriesUNF/NF: Fine THREAD Automotive and AircraftUNEF/NEF: Extra Fine THREAD Thin structures, High Series, 8UN, 8N: 8 TPI, Dia 1-6.
Unified (American)-dim. in inches, pitch in Threads Per Inch (TPI) ... Pitch,Root,Crest,Flank, Rounded or flat, Thread angle. Thread Classes ANSI: 3 classes, class 1, civil constructions class 2, normal production ... about the pitch diameter (not the crest, as in cutting).
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