Общий каталог Yamawa 2022 - 2023 - страница 970

Предыдущая страница Следующая страница

Навигация

Boring before tappingSymbolThreadingGage check Check 1Check 2Check 3 Fine Middle Coarse d=3mm Internal threads Engagement ratio on cutting taps Internal threads Engagement ratio on roll taps Internal threads Flowchart : M3 tapping PD PD Min 100%Max74.1% Min100% TMa2ps TMa3ps Min Max Max Length ofengagement=4.6mm 74.1% 【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 TMa5psTMa6ps classi cation EngagementEngagementlength External threads D1length classi cationSShort engagement length4H5H−S≦1.5（mm）Drill size(ref.)MinMaxMNormal engagement length5H6H7H1.5＜M≦4.5（mm）Bored hole size2.52.4592.599LLong engagement length6H7H8H4.5＜L（mm）Engagement ratio92.4%100%74.1%P=0.5mmD1 is minor diameter of JIS 6H(2nd Class) of internal threadsUnit : mm*Hole size for thread forming tapsMinMax2.752.82Forming 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 threadsP110μｍ〜 25μｍ which makes equal the width of threadsMT1a0psand width of space between the threads P1P2 P2 25μｍ〜 40μｍP340μｍ〜 55μｍP455μｍ〜 70μｍ MT1a2ps P3Width ofP4 *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 toleranceG551μｍ〜 64μｍ diameter G5 G6 64μｍ〜 76μｍ M9-MT2a4ps G6G7 G7 76μｍ〜 89μｍ*Above shows the plus tolerance Basic size of pitch diameter by setting PD basic size as "0". M25-MT4a8ps -150μm -100μm -50μm 2.675mm +50μm +100μm +150μm Ⅱ G5 G6 G7 M50-MT1a0p0s Tolerance of dies is the P1 P2 P1 P2 P3 P4 target of external threads For tUhrneiTfaiaedpdss Class of dies 6g external threads(-95〜-20) 6H internal threads(0〜100)ⅡSolid diesNRGRGP NP For WhtihtwrTeoaardtphss P1 Solid dies JIS 2Class external threads(-95〜-20) JIS 2Class intenal threads(0〜100)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  → (+) 2.675mm For Pipe thTreaadpss Unit : μm Unit : μmRing gage pitch diameter (for external threads inspection)Plug gage pitch diameter (for internal threads inspection) NR6g -105 〜 -95 GR6g -23 〜 -13 GP6H 2 〜 10 NP6H 100 〜 108 FpoirpeAmtherrTeicaaadpnss WRⅡ -95 〜 -87 GRⅡ -32 〜 -24 GPⅡ 4 〜 12 WPⅡ 92 〜 100NR : 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 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