Общий каталог Yamawa 2022 - 2023 - страница 1245

30. List of Thread Standards and Nominal Diameter Ranges of YAMAWA Taps 29. Basic profile of threads ■ Thick Steel Conduit Threads (CTG) ■Japanese Production data Thread symbols Kinds of threads Related Standards ー H 6 Metric screwInternal threadsThread ー Miniature screw threads H 2 H1 Unified threads, Coarse series H Unified 27.5 threads, 7.5°Fine series °2 ー 2 H Metric 55° Trapezoidal screw threads ー H 4 d 1 or D 1 d 2 or D 2 d or D External Thread Taper external pipe threads (JIS main book) Taper internal P pipe threads (JIS main book) H =0.960491P Parallel internal pipe threads (JIS main book) H1 =0.560286P D =d Parallel pipe threads (JIS main book) d 2 =d-0.640327P D2 =d2 P =25.4/n d 1 =d-1.120572P D1 =d1 Parallel pipe threads n =Thread per inch (JIS Appendix) Taper pipe threads (JIS Appendix) Parallel internal pipe threads (JIS Appendix) ■ Steel Conduit ThreadsScrew (CTC) threads for rigid metal thin-walled conduit and fitting Screw threads for rigid metal thick-walled conduit and fitting ー 10 H Internal Thread Cycle threads ー Screw threads for sewing machine (2001.2.20repeal) H 2 H1 Electric 40 socket 0°and lamp-base threads H ° 4 ー H 2 Tire valve 80° threads of automobile d 1 or D 1 d 2 or D 2 External Tire valveThread threads of cycle H2 d or D P H■=0.59588P ISO d1 =d-0.87703P H1 =0.43851P D =d Thread symbols Kinds of threads Related Standards H2 =0.09778P D2 =d2 P =25.4/n d2 =d-0.47670P D1 =d1 ISO Metricnthreads =Thread per inch ISO Miniature screw threads ISO Metric trapezoidal screw threads ■ Bicycle Threads (BC) ISO Unified threads, coarse series ISO Unified threads, fine series ISO Unified threads, extra fine series ー 6 P ISO UnifiedInternal threads, Thread constant pitch series ー H 2 Aerospace - UNJ threads (coarse) r H1 Aerospace -° UNJ threads (fine) H 3 0° 30 ー 12 P r Aerospace - UNJ threads (extra fine) ー H 2 60° Aerospace - UNJ threads (constant pitch series) External Thread d1 or D1 d2 or D2 d or D ー P 6 Aerospace - MJ threads D'1 P Taper external pipe threads H =0.8660P d 1 =d-2H 1 H1 =0.5327P D =d Taper D' 1internal pipe threads =d1+2×P/12 r =P/6 D2 =d2 P =25.4/n Parallel internal pipe threads d 2 =d-H 1 D1 =d1 n =Thread per inch Parallel pipe threads Glass container threads ■ Tire Valve Threads (TV), Bicycle Tire valve threadsTire Valve Threads (CTV) ー 8 H Internal Thread ー H 2 H1 H 30° 30° ー 60° H 2 Information Technical External Thread d1 or D1 d 2 or D 2 d or D ー H 4 P H =0.866025P H1 =0.541266P D =d d2 =d-0.649519P D2 =d2 P =25.4/n d1 =d-1.082532P D1 =d1 n =Thread per inch Technical-94