Общий каталог Yamawa 2022 - 2023 - страница 992

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Boring before tappingSymbolThreadingGage check Check 1Check 2Check 3 Fine Middle Coarse d=10.0mm Internal threads Engagement ratio on cutting taps Internal threads Engagement ratio on roll taps Internal threads Flowchart : M10 tapping PD PD Min 100%Max81.5% Min 100% TMa2ps TMa3ps Min Max Max Length ofengagement=15.1mm 7841.15% 【Length of engagement】 TMa4ps On "middle" engagement class, 7H class can be chosenin case of "L" engagement length. Internal threadsEngagement Internal threads made by roll taps aredierent from those made by cuttingtaps on the shape of minor dimameter.Unit : mm classi cation Engagement Unit : mm TMa5ps Engagement length External threadslength classi cation Drill size(ref.)Min MaxSShort engagement length4H5H−S≦5（mm）MNormal engagement length5H6H7H5＜M≦15（mm）Bored hole size8.58.3768.676LLong engagement length6H7H8H15＜L（mm）Engagement ratio92.4%100%81.5%P=1.5mmD1 is minor diameter of JIS 6H(2nd Class) of internal threads*Hole size for thread forming tapsMinMax9.229.34Formingconditionchangesdependingonworkpiece'sMaterialandshape. TMa6ps Above is for customer's reference. Tolerance area of tap's pitch diameter 【Thread class of cutting taps】 TMa8ps 【Pitch diameter】Diameterofimaginarycylinder or cone Class PD toleranceInternal threadsP220μｍ〜40μｍ which makes equal the width of threadsMT1a0psand width of space between the threads P2P3 P3 40μｍ〜60μｍP460μｍ〜80μｍP580μｍ〜100μｍ MT1a2ps P4Width ofP5 *Above shows the plus toleranceby setting PD basic size as "0". threads 【Thread class of roll taps】 Width of spaceM1-MT8a.5psbetween threadsPitch Class PD toleranceG776μｍ〜89μｍ diameterM9-MT2a4ps G7G8 G8 89μｍ〜102μｍ*Above shows the plus toleranceby setting PD basic size as "0". Basic size of pitch diameter M25-MT4a8ps -200μm -150μm -100μm -50μm 9.026mm +50μm +100μm +150μm +200μm Ⅱ G7 G8 M50-MT1a0p0s Tolerance of dies is thetarget of external threads P1 P2 P2 P3 P4 P5 For tUhrneiTfaiaedpdss Class of diesⅡSolid dies 6g external threads(-164〜-32)NR GR 6H internal threads(0〜180)GP NP P1 Solid dies JIS 2Class external threads(-160〜-40) JIS 2Class intenal threads(0〜140) For WhtihtwrTeoaardtphss P2 for Auto Lathe WR GR GP WPRelative position of PD tolerance area of external threads, internal threads, taps and gages. For oSTncrseeawwitpnhgresm（aadcsShuinsMeeds ） ( ) ← Basic size of pitch diameter → (+) 9.026mm For Pipe thTreaadpss Unit : μm Unit : μmRing gage pitch diameter(for external threads inspection)Plug gage pitch diameter(for internal threads inspection) NR6g -182 〜-164 GR6g -49 〜-31 GP6H 7 〜 17 NP6H 180 〜 190 FpoirpeAmtherrTeicaaadpnss WRⅡ -160 〜-152 GRⅡ -52 〜-44 GPⅡ 4 〜 12 WPⅡ 132 〜 140NR : NOT GO ring gageGR : GO ring gageGP : GO plug gageNP : NOT GO plug gage WR : NOT GO working ring gage                   WP : NOT GO working plug gage For MtinhiraTetauadrpess Unit : mm Unit : mmAccuracy of external threadsAccuracy of internal threadsMajor diameter Pitch diameter Minor diameterMajor diameter Pitch diameter Minor diameter 6g 9.732〜9.968 8.862〜8.994 − 6H − 9.026〜9.206 8.376〜8.676 JIS 2class 9.770〜9.960 8.866〜8.986 〜 8.119 JIS 2class − 9.026〜9.166 8.376〜8.676 Sizes-28