Transcription of ACME - FMS
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ACME - FMS
2007/1 Page 1 - 2 acme SCREW THREADS 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 29O Ref.: ASME/ANSI acme SCREW THREADS This standard has much more information than given here. GENERAL PURPOSE SINGLE START acme SCREW THREADS, STANDARD SERIES NOMINAL DIAMETERS & PITCH DIAMETERS Denomination (inches) Nominal diameter mm Pitch P (mm) Nominal pitch diameter mm 5/16 3/8 7/16 5/8 7/8 1 1 1/8 1 1 3/8 1 1 2 2 2 2 3 3 4 4 5 0,2500 0,3125 0,3750 0,4375 0,5000 0,6250 0,7500 0,8750 1,0000 1,1250 1,2500 1,3750 1,5000 1,7500 2,0000 2,2500 2,5000 2,7500 3,0000 3,5000 4,0000 4,5000 5,0000 6,350 7,937 9,525 11,112 12,700 15,875 19,050 22,225 25,400 28,575 31,750 34,925 38,100 44,450 50,800 57,150 63,500 69,850 76,200 88,900 101,600 114,300 127,000 16 14 12 12 10 8 6 6 5 5 5 4 4 4 4 3 3 3 2 2 2 2 2 1,587 1,814 2,117 2,117 2,540 3,175 4,233 4,233 5,080 5,080 5,080 6,350 6,350 6,350 6,350 8,467 8,467 8,467 12,700 12,700 12,70
3.12 2007/1 Page 2 - 2 Pitch diameter tolerances for external threads (d 2) – classes 2G, 3G and 4G Denomination (inches) 2G T.P.I. 3G 4G max min tol. max min tol. max min tol. ¼ 5/ 16 3/ 8
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