Общий каталог Yamawa 2022 - 2023 - страница 999

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Boring before tappingSymbolThreadingGage check Check 1Check 2Check 3 Fine Middle Coarse d=12.0mm Internal threads Engagement ratio on cutting taps Internal threads Engagement ratio on roll taps Internal threads Flowchart : M12 tapping PD PD Min 100%Max82.3% Min 100% TMap2s Min Max TMap3s Max Length ofengagement=18.1mm 7842.13% 【Length of engagement】 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.TMap4sUnit : mm classi cation EngagementEngagementlength External threads D1length classi cationSShort engagement length4H5H−S≦6（mm）Drill size(ref.)MinMaxMNormal engagement length5H6H7H6＜M≦18（mm）Bored hole size10.310.10610.441LLong engagement length6H7H8H18＜L（mm）Engagement ratio89.7%100%82.3%P=1.75mmD1 is minor diameter of JIS 6H(2nd Class) of internal threadsUnit : mm*Hole size for thread forming tapsMinMax11.0911.23Formingconditionchangesdependingonworkpiece'sMaterialandshape.TMap5s Above is for customer's reference. TMap6s Tolerance area of tap's pitch diameter 【Thread class of cutting taps】ClassPD tolerance【Pitch diameter】DiameterofimaginarycylinderorconeInternal threadsP220μｍ〜40μｍTMap8s which makes equal the width of threadsand width of space between the threads P2P3 P3 40μｍ〜60μｍP460μｍ〜80μｍ TMap1s0P580μｍ〜100μｍ P4Width ofP5 *Above shows the plus toleranceby setting PD basic size as "0". TMap1s2 threads 【Thread class of roll taps】 Width of spacebetween threadsPitch Class PD toleranceG889μｍ〜102μｍ TMap1s-M8.5 diameter G9 102μｍ〜114μｍ G8G9 *Above shows the plus toleranceby setting PD basic size as "0". TMap9s-M24 Basic size of pitch diameter -200μm -150μm -100μm -50μm 10.863mm +50μm +100μm +150μm +200μm TMap2s5-M48 Ⅱ G8 G9 P1Tolerance of dies is theP2 P2 P3 P4 P5 TMap50s-M100 target of external threads Class of dies 6g external threads(-184〜-34)ⅡSolid diesNR GR 6H internal threads(0〜200)GP NP TtFahoprresUadnsified P1 Solid dies JIS 2Class external threads(-180〜-50) JIS 2Class intenal threads(0〜160)P2for Auto LatheWRGRGP WPRelative position of PD tolerance area of external threads, internal threads, taps and gages.TtFahorpresWadhsitworth ( ) ← Basic size of pitch diameter → (+) TFoaonrspSecwsrie（nwg mtSharceMhaidn）sesused 10.863mm Unit : μmRing gage pitch diameter(for external threads inspection) Unit : μmPlug gage pitch diameter(for internal threads inspection)TFaorpPsipe threads NR6g -202 〜-184 GR6g -51 〜-33 GP6H 7 〜 17 NP6H 200 〜 210 WRⅡ -180 〜-172 GRⅡ -62 〜-54NR : NOT GO ring gageGR : GO ring gage GPⅡ 4 〜 12 WPⅡ 152 〜 160GP : GO plug gageNP : NOT GO plug gage TFpaoippresAtmhreeraicdasn WR : NOT GO working ring gage                   WP : NOT GO working plug gage Unit : mmAccuracy of external threads Unit : mmAccuracy of internal threadsTFtahoprresMadinsiature Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 11.701〜11.966 10.679〜10.829 − 6H − 10.863〜11.063 10.106〜10.441 JIS 2class 11.760〜11.950 10.683〜10.813 〜 9.803 JIS 2class − 10.863〜11.023 10.106〜10.441 Sizes-35