Общий каталог Yamawa 2022 - 2023 - страница 970

Flowchart : M3 tapping PD PD Boring before tapping Engagement ratio on cutting taps Check 1 Engagement ratio on roll taps Min Internal threads Min 100% 100% Max 74.1% Internal threads M2s Internal threads p Ta M3s Ta p Min Max Max Length of engagement=4.6mm 74.1% 【Length of engagement】 On "middle" engagement class, 7H class can be chosen Internal threads made by roll taps are M4s in case of "L" engagement length. different from those made by cutting p Internal threads Ta Engagement Unit : mm taps on the shape of minor dimameter. Symbol Middle Coarse classification Engagement D1 Unit : mm Fine d=3mm Engagement length External threads length classification Drill size Min Max *Hole size for thread forming taps M5s (ref.) S Short engagement length 4H 5H − S≦1.5（mm） Min Max Ta p M Normal engagement length 5H 6H 7H 1.5＜M≦4.5（mm） Bored hole size 2.5 2.459 2.599 2.75 2.82 L Long engagement length 6H 7H 8H 4.5＜L（mm） Engagement ratio 92.4% 100% 74.1% Forming condition changes depending P=0.5mm D1 is minor diameter of JIS 6H(2nd Class) of internal threads on workpiece's Material and shape. Above is for customer's reference. M6s p Ta Tolerance area of tap's pitch diameter 【Thread class of cutting taps】 M8s Class PD tolerance T ap 【Pitch diameter】 P1 10μｍ〜 25μｍ Diameter of imaginary cylinder or cone Internal threads P2 25μｍ〜 40μｍ Check 2 which makes equal the width of threads 0 and width of space between the threads M1ps Ta P3 40μｍ〜 55μｍ P1 P4 55μｍ〜 70μｍ P2 2 M1ps P3 *Above shows the plus tolerance by setting PD basic size as "0". Ta Width of P4 threads 【Thread class of roll taps】 Width of space Class PD tolerance 8.5 between threads -M ps M1 Ta G5 51μｍ〜 64μｍ Pitch Threading diameter G5 G6 64μｍ〜 76μｍ 24 G6 G7 76μｍ〜 89μｍ -M s M9 Tap G7 *Above shows the plus tolerance by setting PD basic size as "0". Basic size of pitch diameter 48 -150μm -100μm -50μm 2.675mm +50μm +100μm +150μm 5-M ps M2 Ta Ⅱ G5 G6 G7 100 0-M s P1 P1 P2 P3 P4 M5 Tap Tolerance of dies is the P2 target of external threads nifi ed Class of dies 6g external threads(-95〜-20) 6H internal threads(0〜100) r U ads Fo r e s NR GR GP NP t h Ta p Ⅱ Solid dies P1 Solid dies JIS 2Class external threads(-95〜-20) JIS 2Class intenal threads(0〜100) h ort itw Wh ds P2 for Auto Lathe WR GR GP WP For threa s p Ta Relative position of PD tolerance area of external threads, internal threads, taps and gages. ed ds us threa es crew hin For S ing mac ） w e on s s（S p M (–) ← Basic size of pitch diameter → (+) Ta 2.675mm ds rea Unit : μm Unit : μm e th ps Pip Ring gage pitch diameter (for external threads inspection) Plug gage pitch diameter (for internal threads inspection) For Ta Check 3 NR6g -105 〜 -95 GR6g -23 〜 -13 GP6H 2 〜 10 NP6H 100 〜 108 can eri WRⅡ -95 〜 -87 GRⅡ -32 〜 -24 GPⅡ 4 〜 12 WPⅡ 92 〜 100 Gage check Am ds For threa s e pip Ta p NR : NOT GO ring gage GR : GO ring gage GP : GO plug gage NP : NOT GO plug gage WR : NOT GO working ring gage WP : NOT GO working plug gage ure iat Unit : mm Unit : mm Min ds For threa s p Accuracy of external threads Accuracy of internal threads Ta Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 2.874〜2.980 2.580〜2.655 − 6H − 2.675〜2.775 2.459〜2.599 JIS 2class 2.874〜2.980 2.580〜2.655 〜2.367 JIS 2class − 2.675〜2.775 2.459〜2.599 Sizes-6