Общий каталог Yamawa 2022 - 2023 - страница 974

Предыдущая страница Следующая страница

Навигация

Boring before tappingSymbolThreadingGage check Check 1Check 2Check 3 Fine Middle Coarse d=4.0mm Internal threads Engagement ratio on cutting taps Internal threads Engagement ratio on roll taps Internal threads Flowchart : M4 tapping PD PD Min 100%Max76.3% Min100% TMa2ps TMa3ps Min Max Max Length ofengagement=6.1mm 76.3% 【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 cuttingUnit : mmtaps on the shape of minor dimameter. TMa5psTMa6ps classi cation EngagementEngagementlength External threads D1length classi cationSShort engagement length4H5H−S≦2（mm）Drill size(ref.)MinMaxMNormal engagement length5H6H7H2＜M≦6（mm）Bored hole size3.33.2423.422LLong engagement length6H7H8H6＜L（mm）Engagement ratio92.4%100%76.3%P=0.7mmD1 is minor diameter of JIS 6H(2nd Class) of internal threadsUnit : mm*Hole size for thread forming tapsMinMax3.653.72Forming condition changes dependingonworkpiece'sMaterialandshape.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 P4 *Above shows the plus toleranceby setting PD basic size as "0".Width ofP5 threads 【Thread class of roll taps】 Width of spaceM1-MT8a.5psbetween threadsPitch Class PD toleranceG664μｍ〜76μｍ diameter G6 G7 76μｍ〜89μｍ M9-MT2a4ps G7 G8 89μｍ〜102μｍG8*Above shows the plus tolerance by setting PD basic size as "0". Basic size of pitch diameter M25-MT4a8ps -200μm -150μm -100μm -50μm 3.545mm +50μm +100μm +150μm +200μm Ⅱ G6 G7 G8 M50-MT1a0p0s Tolerance of dies is the P1 P2 P2 P3 P4 P5 target of external threads For tUhrneiTfaiaedpdss Class of diesⅡ Solid dies 6g external threads(-112〜-22) 6H internal threads(0〜118)NRGRGP NP For WhtihtwrTeoaardtphss P1 Solid dies JIS 2Class external threds(-112〜-22) JIS 2Class intenal threads(0〜118)P2for Auto LatheWRGRGP WPRelative position of PD tolerance area of external threads, internal threads, taps and gages. For oSTncrseeawwitpnhgresm（aadcsShuinsMeeds ） ( ) ← Basic size of pitch diameter  → (+) 3.545mm For Pipe thTreaadpss Unit : μm Unit : μmRing gage pitch diameter (for external threads inspection)Plug gage pitch diameter (for internal threads inspection) NR6g -126 〜-112 GR6g -31 〜-17 GP6H 2 〜 10 NP6H 118 〜 126 FpoirpeAmtherrTeicaaadpnss WRⅡ -112 〜-104 GRⅡ -34 〜-26 GPⅡ 4 〜 12 WPⅡ 110 〜 118NR : 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 3.838〜3.978 3.433〜3.523 − 6H − 3.545〜3.663 3.242〜3.422 JIS 2class 3.838〜3.978 3.433〜3.523 〜 3.119 JIS 2class − 3.545〜3.663 3.242〜3.422 Sizes-10