Transcription of JIS (Japanese Industrial Standard) Screw Thread
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JIS (Japanese Industrial Standard) Screw Thread
Screw ThreadTECHNICAL DATAJIS ( japanese Industrial Standard) SpecificationsCourtesy of:Note: Although these specifications are basedon JIS they also apply to ISO and DIN comments added by Maryland Metricscopyright 2002 maryland metrics/osg corporation(1) Flank : Thread face (excluding crestand root of Thread profile)(2) Crest :The tap surface joining thetwo sides or flanks of athread(3) Root :The bottom surface joiningthe flanks of two adjacentflanks(4) Angle of Thread : Angle between adjacentflanks measured at thecross section of screwthread - including the axis ofthe Screw Thread (5) Flank angle :The angle between theindividual flank and theperpendicular to the axis ofthe Thread measured in theaxial plane(6) Pitch :The distance from a pointon one Thread to acorresponding point on thenext Thread measuredparallel to the axis(7) Lead :The distance a Screw threadadvances axially in onecomplete turn(8) Lead angle :Angle formed by a helixpassing a point on a flankand plane perpendicular to the axis of the Screw Thread (applies to parallelthread)(9) Major diameter of external Thread : Diameter of a virtual cylinder which touches the crest ofthe external Thread (10) Minor diameter of internal Thread : Diameter of a virtual cylinder which touches the crest ofthe internal Thread (11) Minor diameter of external Thread : Diameter of a virtual cylinder which touches the root ofthe external Thread (12) Major diameter of internal Thread .
Aug 03, 1998 · (14) Simple pitch diameter : Diameter of an imaginary cylinder when a thread groove width, which is determined by the direction of an axis of screw thread,
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