Общий каталог Yamawa 2022 - 2023 - страница 982

Flowchart : M6 tapping PD PD Check 1 Boring before tapping Engagement ratio on cutting taps Engagement ratio on roll taps Min Internal threads Min 100% 100% Max 78.2% Internal threads M2s Internal threads p Ta M3s Ta p Min Max Max Length of engagement=9.1mm 78.2% 74.1% 【Length of engagement】 Internal threads made by roll taps are M4s On "middle" engagement class, 7H class can be chosen 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 classification Coarse Engagement D1 Unit : mm Fine d=6.0mm Engagement length External threads Drill size Min *Hole size for thread forming taps length classification (ref.) Max M5s S Short engagement length 4H 5H − S≦3（mm） Min Max Ta p M Normal engagement length 5H 6H 7H 3＜M≦9（mm） Bored hole size 5.0 4.917 5.153 5.49 5.59 L Long engagement length 6H 7H 8H 9＜L（mm） Engagement ratio 92.4% 100% 78.2% Forming condition changes depending P=1.0mm 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】 P2 20μｍ〜40μｍ Diameter of imaginary cylinder or cone Internal threads which makes equal the width of threads P3 40μｍ〜60μｍ Check 2 0 and width of space between the threads M1ps P4 60μｍ〜80μｍ Ta P2 P3 P5 80μｍ〜100μｍ P4 *Above shows the plus tolerance P5 2 M1ps by setting PD basic size as "0". Ta Width of threads 【Thread class of roll taps】 Width of space Class PD tolerance 8.5 between threads -M ps M1 Ta G6 64μｍ〜76μｍ Pitch G6 Threading diameter G7 76μｍ〜89μｍ G7 24 -M s G8 G8 89μｍ〜102μｍ M9 Tap *Above shows the plus tolerance by setting PD basic size as "0". Basic size of pitch diameter 48 -200μm -150μm -100μm -50μm 5.350mm +50μm +100μm +150μm +200μm 5-M ps M2 Ta Ⅱ G6 G7 G8 100 0-M s P1 P2 P3 P4 P5 M5 Tap Tolerance of dies is the P2 target of external threads nifi ed Class of dies 6g external threads(-138〜-26) 6H internal threads(0〜150) 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(-130〜-30) JIS 2Class intenal threads(0〜120) 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 5.350mm 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 -152 〜 -138 GR6g -35 〜 -21 GP6H 7 〜 17 NP6H 150 〜 160 can eri WRⅡ -130 〜 -122 GRⅡ -42 〜 -34 GPⅡ 4 〜 12 WPⅡ 112 〜 120 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 Accuracy of external threads Accuracy of internal threads p Ta Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 5.794〜5.974 5.212〜5.324 − 6H − 5.350〜5.500 4.917〜5.153 JIS 2class 5.820〜5.970 5.220〜5.320 〜4.743 JIS 2class − 5.350〜5.470 4.917〜5.153 Sizes-18