Transcription of ISO Trapezoidal screw threads Tr - FMS
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ISO Trapezoidal screw threads Tr - FMS
2007/1 Page 1 - 4 ISO Trapezoidal screw threads Tr NOMINAL PITCH DIAMETER d2 & D2 d2/D2 = d/D PDn (PDn = ) EXTERNAL thread d = major diameter d2 = Pitch diameter d1 = Minor diameter INTERNAL thread D = Major diameter D2 = Pitch diameter D1 = Minor diameter P = Pitch = Flank angle 30O Ref.: ISO 2901 ISO metric Trapezoidal screw threads Basic profile and maximum material profiles. ISO 2902 ISO metric Trapezoidal screw threads general plan ISO 2903 ISO metric Trapezoidal screw threads Tolerances ISO 2904 ISO metric Trapezoidal screw threads basic dimensions These standards contain much more information than given here. Diameters and pitch combinations Nominal diameter Pitch P column 1 column 2 column 3 course normal fine 8 10 9 1,5 2 2 1,5 1,5 12 11 14 3 2 3 3 2 2 2 16 20 18 4 4 4 2 2 2 24 22 26 8 8 8 5 5 5 3 3 3 28 32 30 8 10 10 5 6 6 3 3 3 36 34 38 10 10 10 6 6 7 3 3 3 40 44 42 10 10 12 7 7 7 3 3 3 48 46 50 12 12 12 8 8 8 3 3 3 52 60 55 12 14 14 8 9 9 3 3 3 70 65 75 16 16 16 10 10 10 4 4 4 80 90 85 16 18 18 10 12 12 4 4 4 100 95 105 18 20 20 12 12 12 4 4 4 Nominal diameter Pitch P column 1 column 2 column 3 course normal fine 120 110 115
3.11 2007/1 Page 1 - 4 ISO Trapezoidal screw threads Tr WWW.F-M-S.DK NOMINAL PITCH DIAMETER d 2 & D 2 d 2 /D 2 = d/D – PDn (PDn = 0.5P) EXTERNAL THREAD …
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