{"id":5757,"date":"2025-12-24T05:18:00","date_gmt":"2025-12-24T05:18:00","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5757"},"modified":"2025-12-24T05:18:19","modified_gmt":"2025-12-24T05:18:19","slug":"gb-t-9145-2003-thread-limit-dimensions","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/nl\/blog\/gb-t-9145-2003-thread-limit-dimensions\/","title":{"rendered":"GB\/T 9145-2003 Draadlimietafmetingen"},"content":{"rendered":"

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\n

Inleiding tot de GB\/T 9145-2003-norm<\/h2>\n

Deze norm specificeert de grensmaten voor metrische schroefdraad voor algemeen gebruik met een gemiddelde nauwkeurigheid in de voorkeursserie, waardoor uitwisselbaarheid en prestaties in mechanische assemblages worden gewaarborgd. De norm omvat grove en fijne schroefdraad voor interne en externe toepassingen, waarbij toleranties worden toegepast v\u00f3\u00f3r het galvaniseren voor dunne coatings.<\/p>\n<\/div>\n

\n

Domein<\/h2>\n

GB\/T 9145-2003 definieert de grensmaten voor metrische schroefdraad met een gemiddelde tolerantieprecisie en voorkeursseries, toepasbaar voor algemene technische doeleinden. Het waarborgt dat schroefdraadprofielen de maximale materiaalconditie, gedefinieerd door basisprofielen en tolerantieposities, niet overschrijden. Dit is cruciaal voor bevestigingsmiddelen in industrie\u00ebn die een betrouwbare en wrijvingsloze verbinding vereisen, met name na galvaniseren.<\/p>\n

    \n
  • Van toepassing op schroefdraad v\u00f3\u00f3r het aanbrengen van dunne coatings zoals galvaniseren.<\/li>\n
  • Na het galvaniseren moeten de profielen binnen de H- of h-posities blijven.<\/li>\n
  • Richt zich op middellange inschakellengtes voor een evenwichtige combinatie van sterkte en maakbaarheid.<\/li>\n<\/ul>\n<\/div>\n
    \n

    Algemene grensafmetingen<\/h2>\n

    Geen enkel punt op het schroefdraadprofiel mag het maximale profiel van de entiteit per basisvorm en tolerantie overschrijden. Bij geplateerde schroefdraad mogen de werkelijke contouren na het plateren de H\/h-posities niet overschrijden. Dit voorkomt overmatig aandraaien of defecten in de assemblage. Opmerking: Toleranties zijn geschikt voor dunne platingen; dikkere coatings vereisen aanpassingen.<\/p>\n<\/div>\n

    \n

    Binnenschroefdraad met grove spoed<\/h2>\n

    Voor gemiddelde precisie is de inschakellengte gemiddeld. Tolerantiezones: 5H voor d \u2264 1,4 mm; 6H voor d > 1,4 mm. Limieten voor steekdiameter D2<\/sub> en kleine diameter D1<\/sub> Zorg voor een goede passing met behulp van de uitwendige schroefdraad.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Draad<\/th>\nVerlovingsduur<\/th>\nSteekdiameter D2<\/sub><\/th>\nKleine diameter D1<\/sub><\/th>\n<\/tr>\n
    ><\/th>\n\u2264<\/th>\nmax<\/th>\nmin<\/th>\nmax<\/th>\nmin<\/th>\n<\/tr>\n<\/thead>\n
    M1<\/td>\n0.6<\/td>\n1.7<\/td>\n0.894<\/td>\n0.838<\/td>\n0.785<\/td>\n0.729<\/td>\n<\/tr>\n
    M1.2<\/td>\n0.6<\/td>\n1.7<\/td>\n1.094<\/td>\n1.038<\/td>\n0.985<\/td>\n0.929<\/td>\n<\/tr>\n
    M1.4<\/td>\n0.7<\/td>\n2<\/td>\n1.265<\/td>\n1.205<\/td>\n1.142<\/td>\n1.075<\/td>\n<\/tr>\n
    M1.6<\/td>\n0.8<\/td>\n2.6<\/td>\n1.458<\/td>\n1.373<\/td>\n1.321<\/td>\n1.221<\/td>\n<\/tr>\n
    M1.8<\/td>\n0.8<\/td>\n2.6<\/td>\n1.658<\/td>\n1.573<\/td>\n1.521<\/td>\n1.421<\/td>\n<\/tr>\n
    M2<\/td>\n1<\/td>\n3<\/td>\n1.83<\/td>\n1.74<\/td>\n1.679<\/td>\n1.567<\/td>\n<\/tr>\n
    M2.5<\/td>\n1.3<\/td>\n3.8<\/td>\n2.303<\/td>\n2.208<\/td>\n2.138<\/td>\n2.013<\/td>\n<\/tr>\n
    M3<\/td>\n1.5<\/td>\n4.5<\/td>\n2.775<\/td>\n2.675<\/td>\n2.599<\/td>\n2.459<\/td>\n<\/tr>\n
    M3.5<\/td>\n1.7<\/td>\n5<\/td>\n3.222<\/td>\n3.11<\/td>\n3.01<\/td>\n2.85<\/td>\n<\/tr>\n
    M4<\/td>\n2<\/td>\n6<\/td>\n3.663<\/td>\n3.545<\/td>\n3.422<\/td>\n3.242<\/td>\n<\/tr>\n
    M5<\/td>\n2.5<\/td>\n7.5<\/td>\n4.605<\/td>\n4.48<\/td>\n4.334<\/td>\n4.134<\/td>\n<\/tr>\n
    M6<\/td>\n3<\/td>\n9<\/td>\n5.5<\/td>\n5.35<\/td>\n5.153<\/td>\n4.917<\/td>\n<\/tr>\n
    M7<\/td>\n3<\/td>\n9<\/td>\n6.5<\/td>\n6.35<\/td>\n6.153<\/td>\n5.917<\/td>\n<\/tr>\n
    M8<\/td>\n4<\/td>\n12<\/td>\n7.348<\/td>\n7.188<\/td>\n6.912<\/td>\n6.647<\/td>\n<\/tr>\n
    M10<\/td>\n5<\/td>\n15<\/td>\n9.206<\/td>\n9.026<\/td>\n8.676<\/td>\n8.376<\/td>\n<\/tr>\n
    M12<\/td>\n6<\/td>\n18<\/td>\n11.063<\/td>\n10.863<\/td>\n10.441<\/td>\n10.106<\/td>\n<\/tr>\n
    M14<\/td>\n8<\/td>\n24<\/td>\n12.913<\/td>\n12.701<\/td>\n12.21<\/td>\n11.835<\/td>\n<\/tr>\n
    M16<\/td>\n8<\/td>\n24<\/td>\n14.913<\/td>\n14.701<\/td>\n14.21<\/td>\n13.835<\/td>\n<\/tr>\n
    M18<\/td>\n10<\/td>\n30<\/td>\n16.6<\/td>\n16.376<\/td>\n15.744<\/td>\n15.294<\/td>\n<\/tr>\n
    M20<\/td>\n10<\/td>\n30<\/td>\n18.6<\/td>\n18.376<\/td>\n17.744<\/td>\n17.294<\/td>\n<\/tr>\n
    M22<\/td>\n10<\/td>\n30<\/td>\n20.6<\/td>\n20.376<\/td>\n19.744<\/td>\n19.294<\/td>\n<\/tr>\n
    M24<\/td>\n12<\/td>\n36<\/td>\n22.316<\/td>\n22.051<\/td>\n21.252<\/td>\n20.752<\/td>\n<\/tr>\n
    M27<\/td>\n12<\/td>\n36<\/td>\n25.316<\/td>\n25.051<\/td>\n24.252<\/td>\n23.752<\/td>\n<\/tr>\n
    M30<\/td>\n15<\/td>\n45<\/td>\n28.007<\/td>\n27.727<\/td>\n26.771<\/td>\n26.211<\/td>\n<\/tr>\n
    M33<\/td>\n15<\/td>\n45<\/td>\n31.007<\/td>\n30.727<\/td>\n29.771<\/td>\n29.211<\/td>\n<\/tr>\n
    M36<\/td>\n18<\/td>\n53<\/td>\n33.702<\/td>\n33.402<\/td>\n32.27<\/td>\n31.67<\/td>\n<\/tr>\n
    M39<\/td>\n18<\/td>\n53<\/td>\n36.702<\/td>\n36.402<\/td>\n35.27<\/td>\n34.67<\/td>\n<\/tr>\n
    M42<\/td>\n21<\/td>\n63<\/td>\n39.392<\/td>\n39.077<\/td>\n37.799<\/td>\n37.129<\/td>\n<\/tr>\n
    M45<\/td>\n21<\/td>\n63<\/td>\n42.392<\/td>\n42.077<\/td>\n40.799<\/td>\n40.129<\/td>\n<\/tr>\n
    M48<\/td>\n24<\/td>\n71<\/td>\n45.087<\/td>\n44.752<\/td>\n43.297<\/td>\n42.587<\/td>\n<\/tr>\n
    M52<\/td>\n24<\/td>\n71<\/td>\n49.087<\/td>\n48.752<\/td>\n46.681<\/td>\n45.971<\/td>\n<\/tr>\n
    M56<\/td>\n28<\/td>\n85<\/td>\n52.783<\/td>\n52.428<\/td>\n50.796<\/td>\n50.046<\/td>\n<\/tr>\n
    M60<\/td>\n28<\/td>\n85<\/td>\n56.783<\/td>\n56.428<\/td>\n54.796<\/td>\n54.046<\/td>\n<\/tr>\n
    M64<\/td>\n32<\/td>\n95<\/td>\n60.478<\/td>\n60.103<\/td>\n58.305<\/td>\n57.505<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Deze afmetingen dienen als richtlijn voor de productie van moeren en garanderen compatibiliteit met bouten onder gemiddelde belasting.<\/p>\n<\/div>\n

    \n

    Buitendraad met grove spoed<\/h2>\n

    Gemiddelde precisie, gemiddelde inschakeling. Tolerantiezones: 6h voor d \u2264 1,4 mm; 6g voor d > 1,4 mm. Limieten voor de grootste diameter d en de steekdiameter d.2<\/sub>, met minimale wortelstraal volgens GB\/T 197-2003.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Draad<\/th>\nVerlovingsduur<\/th>\nGrote diameter d<\/th>\nSteekdiameter d2<\/sub><\/th>\nMinimale wortelstraalA<\/sup><\/th>\n<\/tr>\n
    ><\/th>\n\u2264<\/th>\nmax<\/th>\nmin<\/th>\nmax<\/th>\nmin<\/th>\nmin<\/th>\n<\/tr>\n<\/thead>\n
    M1<\/td>\n0.6<\/td>\n1.7<\/td>\n1<\/td>\n0.933<\/td>\n0.838<\/td>\n0.785<\/td>\n0.031<\/td>\n<\/tr>\n
    M1.2<\/td>\n0.6<\/td>\n1.7<\/td>\n1.2<\/td>\n1.133<\/td>\n1.038<\/td>\n0.985<\/td>\n0.031<\/td>\n<\/tr>\n
    M1.4<\/td>\n0.7<\/td>\n2<\/td>\n1.4<\/td>\n1.325<\/td>\n1.205<\/td>\n1.149<\/td>\n0.038<\/td>\n<\/tr>\n
    M1.6<\/td>\n0.8<\/td>\n2.6<\/td>\n1.581<\/td>\n1.496<\/td>\n1.354<\/td>\n1.291<\/td>\n0.044<\/td>\n<\/tr>\n
    M1.8<\/td>\n0.8<\/td>\n2.6<\/td>\n1.781<\/td>\n1.696<\/td>\n1.554<\/td>\n1.491<\/td>\n0.044<\/td>\n<\/tr>\n
    M2<\/td>\n1<\/td>\n3<\/td>\n1.981<\/td>\n1.886<\/td>\n1.721<\/td>\n1.654<\/td>\n0.05<\/td>\n<\/tr>\n
    M2.5<\/td>\n1.3<\/td>\n3.8<\/td>\n2.48<\/td>\n2.38<\/td>\n2.188<\/td>\n2.117<\/td>\n0.056<\/td>\n<\/tr>\n
    M3<\/td>\n1.5<\/td>\n4.5<\/td>\n2.98<\/td>\n2.874<\/td>\n2.655<\/td>\n2.58<\/td>\n0.063<\/td>\n<\/tr>\n
    M3.5<\/td>\n1.7<\/td>\n5<\/td>\n3.479<\/td>\n3.354<\/td>\n3.089<\/td>\n3.004<\/td>\n0.075<\/td>\n<\/tr>\n
    M4<\/td>\n2<\/td>\n6<\/td>\n3.978<\/td>\n3.838<\/td>\n3.523<\/td>\n3.433<\/td>\n0.088<\/td>\n<\/tr>\n
    M5<\/td>\n2.5<\/td>\n7.5<\/td>\n4.976<\/td>\n4.826<\/td>\n4.456<\/td>\n4.361<\/td>\n0.1<\/td>\n<\/tr>\n
    M6<\/td>\n3<\/td>\n9<\/td>\n5.974<\/td>\n5.794<\/td>\n5.324<\/td>\n5.212<\/td>\n0.125<\/td>\n<\/tr>\n
    M7<\/td>\n3<\/td>\n9<\/td>\n6.974<\/td>\n6.794<\/td>\n6.324<\/td>\n6.212<\/td>\n0.125<\/td>\n<\/tr>\n
    M8<\/td>\n4<\/td>\n12<\/td>\n7.972<\/td>\n7.76<\/td>\n7.16<\/td>\n7.042<\/td>\n0.156<\/td>\n<\/tr>\n
    M10<\/td>\n5<\/td>\n15<\/td>\n9.968<\/td>\n9.732<\/td>\n8.994<\/td>\n8.862<\/td>\n0.188<\/td>\n<\/tr>\n
    M12<\/td>\n6<\/td>\n18<\/td>\n11.966<\/td>\n11.701<\/td>\n10.829<\/td>\n10.679<\/td>\n0.219<\/td>\n<\/tr>\n
    M14<\/td>\n8<\/td>\n24<\/td>\n13.962<\/td>\n13.682<\/td>\n12.663<\/td>\n12.503<\/td>\n0.25<\/td>\n<\/tr>\n
    M16<\/td>\n8<\/td>\n24<\/td>\n15.962<\/td>\n15.682<\/td>\n14.663<\/td>\n14.503<\/td>\n0.25<\/td>\n<\/tr>\n
    M18<\/td>\n10<\/td>\n30<\/td>\n17.958<\/td>\n17.623<\/td>\n16.334<\/td>\n16.164<\/td>\n0.313<\/td>\n<\/tr>\n
    M20<\/td>\n10<\/td>\n30<\/td>\n19.958<\/td>\n19.623<\/td>\n18.334<\/td>\n18.164<\/td>\n0.313<\/td>\n<\/tr>\n
    M22<\/td>\n10<\/td>\n30<\/td>\n21.958<\/td>\n21.623<\/td>\n20.334<\/td>\n20.164<\/td>\n0.313<\/td>\n<\/tr>\n
    M24<\/td>\n12<\/td>\n36<\/td>\n23.952<\/td>\n23.577<\/td>\n22.003<\/td>\n21.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M27<\/td>\n12<\/td>\n36<\/td>\n26.952<\/td>\n26.577<\/td>\n25.003<\/td>\n24.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M30<\/td>\n15<\/td>\n45<\/td>\n29.947<\/td>\n29.522<\/td>\n27.674<\/td>\n27.462<\/td>\n0.438<\/td>\n<\/tr>\n
    M33<\/td>\n15<\/td>\n45<\/td>\n32.947<\/td>\n32.522<\/td>\n30.674<\/td>\n30.462<\/td>\n0.438<\/td>\n<\/tr>\n
    M36<\/td>\n18<\/td>\n53<\/td>\n35.94<\/td>\n35.465<\/td>\n33.342<\/td>\n33.118<\/td>\n0.5<\/td>\n<\/tr>\n
    M39<\/td>\n18<\/td>\n53<\/td>\n38.94<\/td>\n38.465<\/td>\n36.342<\/td>\n36.118<\/td>\n0.5<\/td>\n<\/tr>\n
    M42<\/td>\n21<\/td>\n63<\/td>\n41.937<\/td>\n41.437<\/td>\n39.014<\/td>\n38.778<\/td>\n0.563<\/td>\n<\/tr>\n
    M45<\/td>\n21<\/td>\n63<\/td>\n44.937<\/td>\n44.437<\/td>\n42.014<\/td>\n41.778<\/td>\n0.563<\/td>\n<\/tr>\n
    M48<\/td>\n24<\/td>\n71<\/td>\n47.929<\/td>\n47.399<\/td>\n44.681<\/td>\n44.431<\/td>\n0.625<\/td>\n<\/tr>\n
    M52<\/td>\n24<\/td>\n71<\/td>\n51.929<\/td>\n51.399<\/td>\n48.681<\/td>\n48.431<\/td>\n0.625<\/td>\n<\/tr>\n
    M56<\/td>\n28<\/td>\n85<\/td>\n55.925<\/td>\n55.365<\/td>\n52.353<\/td>\n52.088<\/td>\n0.688<\/td>\n<\/tr>\n
    M60<\/td>\n28<\/td>\n85<\/td>\n59.925<\/td>\n59.365<\/td>\n56.353<\/td>\n56.088<\/td>\n0.688<\/td>\n<\/tr>\n
    M64<\/td>\n32<\/td>\n95<\/td>\n63.92<\/td>\n63.32<\/td>\n60.023<\/td>\n59.743<\/td>\n0.75<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    A<\/sup> Zie GB\/T 197-2003 Hoofdstuk 7 en Tabel 9 voor details over de wortelradius. Deze zorgen voor een goede spanningsverdeling en weerstand tegen vermoeiing.<\/p>\n<\/div>\n

    \n

    Fijne binnenschroefdraad<\/h2>\n

    Gemiddelde precisie, gemiddelde inschakeling, tolerantiezone van 6H. Fijne spoed biedt betere trillingsbestendigheid en afstelprecisie.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Draad<\/th>\nVerlovingsduur<\/th>\nSteekdiameter D2<\/sub><\/th>\nKleine diameter D1<\/sub><\/th>\n<\/tr>\n
    ><\/th>\n\u2264<\/th>\nmax<\/th>\nmin<\/th>\nmax<\/th>\nmin<\/th>\n<\/tr>\n<\/thead>\n
    M8\u00d71<\/td>\n3<\/td>\n9<\/td>\n7.5<\/td>\n7.35<\/td>\n7.153<\/td>\n6.917<\/td>\n<\/tr>\n
    M10\u00d71<\/td>\n4<\/td>\n12<\/td>\n9.5<\/td>\n9.35<\/td>\n9.153<\/td>\n8.917<\/td>\n<\/tr>\n
    M10\u00d71.25<\/td>\n4<\/td>\n12<\/td>\n9.348<\/td>\n9.188<\/td>\n8.912<\/td>\n8.647<\/td>\n<\/tr>\n
    M12\u00d71.25<\/td>\n4.5<\/td>\n13<\/td>\n11.368<\/td>\n11.188<\/td>\n10.912<\/td>\n10.647<\/td>\n<\/tr>\n
    M12\u00d71.5<\/td>\n4.5<\/td>\n13<\/td>\n11.216<\/td>\n11.026<\/td>\n10.676<\/td>\n10.376<\/td>\n<\/tr>\n
    M14\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n13.216<\/td>\n13.026<\/td>\n12.676<\/td>\n12.376<\/td>\n<\/tr>\n
    M16\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n15.216<\/td>\n15.026<\/td>\n14.676<\/td>\n14.376<\/td>\n<\/tr>\n
    M18\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n17.216<\/td>\n17.026<\/td>\n16.676<\/td>\n16.376<\/td>\n<\/tr>\n
    M18\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n16.913<\/td>\n16.701<\/td>\n16.21<\/td>\n15.835<\/td>\n<\/tr>\n
    M20\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n19.216<\/td>\n19.026<\/td>\n18.676<\/td>\n18.376<\/td>\n<\/tr>\n
    M20\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n18.913<\/td>\n18.701<\/td>\n18.21<\/td>\n17.835<\/td>\n<\/tr>\n
    M22\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n21.216<\/td>\n21.026<\/td>\n20.676<\/td>\n20.376<\/td>\n<\/tr>\n
    M22\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n20.913<\/td>\n20.701<\/td>\n20.21<\/td>\n19.835<\/td>\n<\/tr>\n
    M24\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n22.925<\/td>\n22.701<\/td>\n22.21<\/td>\n21.835<\/td>\n<\/tr>\n
    M27\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n25.925<\/td>\n25.701<\/td>\n25.21<\/td>\n24.835<\/td>\n<\/tr>\n
    M30\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n28.925<\/td>\n28.701<\/td>\n28.21<\/td>\n27.835<\/td>\n<\/tr>\n
    M33\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n31.925<\/td>\n31.701<\/td>\n31.21<\/td>\n30.835<\/td>\n<\/tr>\n
    M36\u00d73<\/td>\n12<\/td>\n36<\/td>\n34.316<\/td>\n34.051<\/td>\n33.252<\/td>\n32.752<\/td>\n<\/tr>\n
    M39\u00d73<\/td>\n12<\/td>\n36<\/td>\n37.316<\/td>\n37.051<\/td>\n36.252<\/td>\n35.752<\/td>\n<\/tr>\n
    M42\u00d73<\/td>\n12<\/td>\n36<\/td>\n40.316<\/td>\n40.051<\/td>\n39.252<\/td>\n38.752<\/td>\n<\/tr>\n
    M45\u00d73<\/td>\n12<\/td>\n36<\/td>\n43.316<\/td>\n43.051<\/td>\n42.252<\/td>\n41.752<\/td>\n<\/tr>\n
    M48\u00d73<\/td>\n15<\/td>\n45<\/td>\n46.331<\/td>\n46.051<\/td>\n45.252<\/td>\n44.752<\/td>\n<\/tr>\n
    M52\u00d74<\/td>\n19<\/td>\n56<\/td>\n49.717<\/td>\n49.402<\/td>\n48.27<\/td>\n47.67<\/td>\n<\/tr>\n
    M56\u00d74<\/td>\n19<\/td>\n56<\/td>\n53.717<\/td>\n53.402<\/td>\n52.27<\/td>\n51.67<\/td>\n<\/tr>\n
    M60\u00d74<\/td>\n19<\/td>\n56<\/td>\n57.717<\/td>\n57.402<\/td>\n56.27<\/td>\n55.67<\/td>\n<\/tr>\n
    M64\u00d74<\/td>\n19<\/td>\n56<\/td>\n61.717<\/td>\n61.402<\/td>\n60.27<\/td>\n59.67<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Deze waarden ondersteunen een fijnere lastverdeling in omgevingen met hoge trillingen.<\/p>\n<\/div>\n

    \n

    Fijne buitendraad<\/h2>\n

    Gemiddelde precisie, gemiddelde inschakeling, tolerantiezone van 6 g. Biedt sterkere kernsecties voor verbeterde schuifsterkte.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Draad<\/th>\nVerlovingsduur<\/th>\nGrote diameter d<\/th>\nSteekdiameter d2<\/sub><\/th>\nMinimale wortelstraalA<\/sup><\/th>\n<\/tr>\n
    ><\/th>\n\u2264<\/th>\nmax<\/th>\nmin<\/th>\nmax<\/th>\nmin<\/th>\nmin<\/th>\n<\/tr>\n<\/thead>\n
    M8\u00d71<\/td>\n3<\/td>\n9<\/td>\n7.974<\/td>\n7.794<\/td>\n7.324<\/td>\n7.212<\/td>\n0.125<\/td>\n<\/tr>\n
    M10\u00d71<\/td>\n4<\/td>\n12<\/td>\n9.974<\/td>\n9.794<\/td>\n9.324<\/td>\n9.212<\/td>\n0.125<\/td>\n<\/tr>\n
    M10\u00d71.25<\/td>\n4<\/td>\n12<\/td>\n9.972<\/td>\n9.76<\/td>\n9.16<\/td>\n9.042<\/td>\n0.156<\/td>\n<\/tr>\n
    M12\u00d71.25<\/td>\n4.5<\/td>\n13<\/td>\n11.972<\/td>\n11.76<\/td>\n11.16<\/td>\n11.028<\/td>\n0.156<\/td>\n<\/tr>\n
    M12\u00d71.5<\/td>\n4.5<\/td>\n13<\/td>\n11.968<\/td>\n11.732<\/td>\n10.994<\/td>\n10.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M14\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n13.968<\/td>\n13.732<\/td>\n12.994<\/td>\n12.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M16\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n15.968<\/td>\n15.732<\/td>\n14.994<\/td>\n14.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M18\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n17.968<\/td>\n17.732<\/td>\n16.994<\/td>\n16.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M18\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n17.962<\/td>\n17.682<\/td>\n16.663<\/td>\n16.503<\/td>\n0.25<\/td>\n<\/tr>\n
    M20\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n19.968<\/td>\n19.732<\/td>\n18.994<\/td>\n18.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M20\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n19.962<\/td>\n19.682<\/td>\n18.663<\/td>\n18.503<\/td>\n0.25<\/td>\n<\/tr>\n
    M22\u00d71.5<\/td>\n5.6<\/td>\n16<\/td>\n21.968<\/td>\n21.732<\/td>\n20.994<\/td>\n20.854<\/td>\n0.188<\/td>\n<\/tr>\n
    M22\u00d72<\/td>\n5.6<\/td>\n16<\/td>\n21.962<\/td>\n21.682<\/td>\n20.663<\/td>\n20.503<\/td>\n0.25<\/td>\n<\/tr>\n
    M24\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n23.962<\/td>\n23.682<\/td>\n22.663<\/td>\n22.493<\/td>\n0.25<\/td>\n<\/tr>\n
    M27\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n26.962<\/td>\n26.682<\/td>\n25.663<\/td>\n25.493<\/td>\n0.25<\/td>\n<\/tr>\n
    M30\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n29.962<\/td>\n29.682<\/td>\n28.663<\/td>\n28.493<\/td>\n0.25<\/td>\n<\/tr>\n
    M33\u00d72<\/td>\n8.5<\/td>\n25<\/td>\n32.962<\/td>\n32.682<\/td>\n31.663<\/td>\n31.493<\/td>\n0.25<\/td>\n<\/tr>\n
    M36\u00d73<\/td>\n12<\/td>\n36<\/td>\n35.952<\/td>\n35.577<\/td>\n34.003<\/td>\n33.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M39\u00d73<\/td>\n12<\/td>\n36<\/td>\n38.952<\/td>\n38.577<\/td>\n37.003<\/td>\n36.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M42\u00d73<\/td>\n12<\/td>\n36<\/td>\n41.952<\/td>\n41.577<\/td>\n40.003<\/td>\n39.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M45\u00d73<\/td>\n12<\/td>\n36<\/td>\n44.952<\/td>\n44.577<\/td>\n43.003<\/td>\n42.803<\/td>\n0.375<\/td>\n<\/tr>\n
    M48\u00d73<\/td>\n15<\/td>\n45<\/td>\n47.952<\/td>\n47.577<\/td>\n46.003<\/td>\n45.791<\/td>\n0.375<\/td>\n<\/tr>\n
    M52\u00d74<\/td>\n19<\/td>\n56<\/td>\n51.94<\/td>\n51.465<\/td>\n49.342<\/td>\n49.106<\/td>\n0.5<\/td>\n<\/tr>\n
    M56\u00d74<\/td>\n19<\/td>\n56<\/td>\n55.94<\/td>\n55.465<\/td>\n53.342<\/td>\n53.106<\/td>\n0.5<\/td>\n<\/tr>\n
    M60\u00d74<\/td>\n19<\/td>\n56<\/td>\n59.94<\/td>\n59.465<\/td>\n57.342<\/td>\n57.106<\/td>\n0.5<\/td>\n<\/tr>\n
    M64\u00d74<\/td>\n19<\/td>\n56<\/td>\n63.94<\/td>\n63.465<\/td>\n61.342<\/td>\n61.106<\/td>\n0.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    A<\/sup> Zie GB\/T 197-2003 voor specificaties met betrekking tot de wortelradius; dit is cruciaal om spanningsconcentraties te voorkomen.<\/p>\n<\/div>\n

    \n

    Veelgestelde vragen<\/h2>\n

    Welke tolerantiezones gelden voor grove inwendige schroefdraad?<\/h3>\n

    5H voor diameters \u22641,4 mm; 6H voor >1,4 mm, wat een gemiddelde precisiepassing garandeert.<\/p>\n

    Welke invloed heeft de galvanische laag op de schroefdraadafmetingen?<\/h3>\n

    De toleranties gelden v\u00f3\u00f3r het galvaniseren; de profielen na het galvaniseren mogen de H\/h-posities niet overschrijden, zodat dunne coatings de montage kunnen handhaven.<\/p>\n

    Waarom zou je fijne schroefdraad gebruiken?<\/h3>\n

    Ze bieden een betere trillingsbestendigheid en fijnere afstellingen, met sterkere kernen volgens de limieten in tabel 3 en 4.<\/p>\n

    Wat is een gemiddelde verlovingsduur?<\/h3>\n

    Het biedt een evenwicht tussen schroefdraadsterkte en kosten; gebruik tabelwaarden voor specifieke bereiken om over- of onderspanning te voorkomen.<\/p>\n

    Hoe moet je de wortelstraal interpreteren?<\/h3>\n

    De minimumwaarden volgens GB\/T 197-2003 verminderen de spanning; essentieel voor toepassingen die gevoelig zijn voor vermoeiing.<\/p>\n

    Gelden deze limieten voor alle materialen?<\/h3>\n

    Ja, maar pas de afmetingen aan voor speciale coatings; raadpleeg de standaard voor zware coatings die een grotere schroefdraad vereisen.<\/p>\n<\/div>\n

     [\/et_pb_text][\/et_pb_column]
    \n\t\t\t[\/et_pb_row]
    \n\t\t[\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":"

    Introduction to GB\/T 9145-2003 Standard This standard specifies limit dimensions for general-purpose metric screw threads of medium accuracy in the preferred series, ensuring interchangeability and performance in mechanical assemblies. It covers coarse and fine pitch threads for internal and external applications, with tolerances applied before plating for thin coatings. Scope GB\/T 9145-2003 defines the limit […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"

    \r\n

    Introduction to GB\/T 9145-2003 Standard<\/h2>\r\nThis standard specifies limit dimensions for general-purpose metric screw threads of medium accuracy in the preferred series, ensuring interchangeability and performance in mechanical assemblies. It covers coarse and fine pitch threads for internal and external applications, with tolerances applied before plating for thin coatings.\r\n\r\n<\/div>\r\n
    \r\n

    Scope<\/h2>\r\nGB\/T 9145-2003 defines the limit dimensions for metric screw threads with medium tolerance precision and preferred series, applicable to general engineering purposes. It ensures that thread profiles do not exceed the maximum material condition defined by basic profiles and tolerance positions. This is crucial for fasteners in industries requiring reliable mating without interference, especially post-plating.\r\n
      \r\n \t
    • Applies to threads before thin coatings like electroplating.<\/li>\r\n \t
    • Post-plating, profiles must stay within H or h positions.<\/li>\r\n \t
    • Focuses on medium engagement lengths for balanced strength and manufacturability.<\/li>\r\n<\/ul>\r\n<\/div>\r\n
      \r\n

      General Limit Dimensions<\/h2>\r\nNo point on the thread root profile shall exceed the maximum entity profile per basic form and tolerance. For plated threads, actual contours post-plating must not surpass H\/h positions. This prevents over-tightening or failure in assemblies. Note: Tolerances suit thin platings; heavier coatings require adjustments.\r\n\r\n<\/div>\r\n
      \r\n

      Coarse Pitch Internal Threads<\/h2>\r\nFor medium precision, engagement length is medium. Tolerance zones: 5H for d \u2264 1.4 mm; 6H for d > 1.4 mm. Limits for pitch diameter D2<\/sub> and minor diameter D1<\/sub> ensure proper fit with external threads.\r\n
      \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
      Thread<\/th>\r\nEngagement Length<\/th>\r\nPitch Diameter D2<\/sub><\/th>\r\nMinor Diameter D1<\/sub><\/th>\r\n<\/tr>\r\n
      ><\/th>\r\n\u2264<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
      M1<\/td>\r\n0.6<\/td>\r\n1.7<\/td>\r\n0.894<\/td>\r\n0.838<\/td>\r\n0.785<\/td>\r\n0.729<\/td>\r\n<\/tr>\r\n
      M1.2<\/td>\r\n0.6<\/td>\r\n1.7<\/td>\r\n1.094<\/td>\r\n1.038<\/td>\r\n0.985<\/td>\r\n0.929<\/td>\r\n<\/tr>\r\n
      M1.4<\/td>\r\n0.7<\/td>\r\n2<\/td>\r\n1.265<\/td>\r\n1.205<\/td>\r\n1.142<\/td>\r\n1.075<\/td>\r\n<\/tr>\r\n
      M1.6<\/td>\r\n0.8<\/td>\r\n2.6<\/td>\r\n1.458<\/td>\r\n1.373<\/td>\r\n1.321<\/td>\r\n1.221<\/td>\r\n<\/tr>\r\n
      M1.8<\/td>\r\n0.8<\/td>\r\n2.6<\/td>\r\n1.658<\/td>\r\n1.573<\/td>\r\n1.521<\/td>\r\n1.421<\/td>\r\n<\/tr>\r\n
      M2<\/td>\r\n1<\/td>\r\n3<\/td>\r\n1.83<\/td>\r\n1.74<\/td>\r\n1.679<\/td>\r\n1.567<\/td>\r\n<\/tr>\r\n
      M2.5<\/td>\r\n1.3<\/td>\r\n3.8<\/td>\r\n2.303<\/td>\r\n2.208<\/td>\r\n2.138<\/td>\r\n2.013<\/td>\r\n<\/tr>\r\n
      M3<\/td>\r\n1.5<\/td>\r\n4.5<\/td>\r\n2.775<\/td>\r\n2.675<\/td>\r\n2.599<\/td>\r\n2.459<\/td>\r\n<\/tr>\r\n
      M3.5<\/td>\r\n1.7<\/td>\r\n5<\/td>\r\n3.222<\/td>\r\n3.11<\/td>\r\n3.01<\/td>\r\n2.85<\/td>\r\n<\/tr>\r\n
      M4<\/td>\r\n2<\/td>\r\n6<\/td>\r\n3.663<\/td>\r\n3.545<\/td>\r\n3.422<\/td>\r\n3.242<\/td>\r\n<\/tr>\r\n
      M5<\/td>\r\n2.5<\/td>\r\n7.5<\/td>\r\n4.605<\/td>\r\n4.48<\/td>\r\n4.334<\/td>\r\n4.134<\/td>\r\n<\/tr>\r\n
      M6<\/td>\r\n3<\/td>\r\n9<\/td>\r\n5.5<\/td>\r\n5.35<\/td>\r\n5.153<\/td>\r\n4.917<\/td>\r\n<\/tr>\r\n
      M7<\/td>\r\n3<\/td>\r\n9<\/td>\r\n6.5<\/td>\r\n6.35<\/td>\r\n6.153<\/td>\r\n5.917<\/td>\r\n<\/tr>\r\n
      M8<\/td>\r\n4<\/td>\r\n12<\/td>\r\n7.348<\/td>\r\n7.188<\/td>\r\n6.912<\/td>\r\n6.647<\/td>\r\n<\/tr>\r\n
      M10<\/td>\r\n5<\/td>\r\n15<\/td>\r\n9.206<\/td>\r\n9.026<\/td>\r\n8.676<\/td>\r\n8.376<\/td>\r\n<\/tr>\r\n
      M12<\/td>\r\n6<\/td>\r\n18<\/td>\r\n11.063<\/td>\r\n10.863<\/td>\r\n10.441<\/td>\r\n10.106<\/td>\r\n<\/tr>\r\n
      M14<\/td>\r\n8<\/td>\r\n24<\/td>\r\n12.913<\/td>\r\n12.701<\/td>\r\n12.21<\/td>\r\n11.835<\/td>\r\n<\/tr>\r\n
      M16<\/td>\r\n8<\/td>\r\n24<\/td>\r\n14.913<\/td>\r\n14.701<\/td>\r\n14.21<\/td>\r\n13.835<\/td>\r\n<\/tr>\r\n
      M18<\/td>\r\n10<\/td>\r\n30<\/td>\r\n16.6<\/td>\r\n16.376<\/td>\r\n15.744<\/td>\r\n15.294<\/td>\r\n<\/tr>\r\n
      M20<\/td>\r\n10<\/td>\r\n30<\/td>\r\n18.6<\/td>\r\n18.376<\/td>\r\n17.744<\/td>\r\n17.294<\/td>\r\n<\/tr>\r\n
      M22<\/td>\r\n10<\/td>\r\n30<\/td>\r\n20.6<\/td>\r\n20.376<\/td>\r\n19.744<\/td>\r\n19.294<\/td>\r\n<\/tr>\r\n
      M24<\/td>\r\n12<\/td>\r\n36<\/td>\r\n22.316<\/td>\r\n22.051<\/td>\r\n21.252<\/td>\r\n20.752<\/td>\r\n<\/tr>\r\n
      M27<\/td>\r\n12<\/td>\r\n36<\/td>\r\n25.316<\/td>\r\n25.051<\/td>\r\n24.252<\/td>\r\n23.752<\/td>\r\n<\/tr>\r\n
      M30<\/td>\r\n15<\/td>\r\n45<\/td>\r\n28.007<\/td>\r\n27.727<\/td>\r\n26.771<\/td>\r\n26.211<\/td>\r\n<\/tr>\r\n
      M33<\/td>\r\n15<\/td>\r\n45<\/td>\r\n31.007<\/td>\r\n30.727<\/td>\r\n29.771<\/td>\r\n29.211<\/td>\r\n<\/tr>\r\n
      M36<\/td>\r\n18<\/td>\r\n53<\/td>\r\n33.702<\/td>\r\n33.402<\/td>\r\n32.27<\/td>\r\n31.67<\/td>\r\n<\/tr>\r\n
      M39<\/td>\r\n18<\/td>\r\n53<\/td>\r\n36.702<\/td>\r\n36.402<\/td>\r\n35.27<\/td>\r\n34.67<\/td>\r\n<\/tr>\r\n
      M42<\/td>\r\n21<\/td>\r\n63<\/td>\r\n39.392<\/td>\r\n39.077<\/td>\r\n37.799<\/td>\r\n37.129<\/td>\r\n<\/tr>\r\n
      M45<\/td>\r\n21<\/td>\r\n63<\/td>\r\n42.392<\/td>\r\n42.077<\/td>\r\n40.799<\/td>\r\n40.129<\/td>\r\n<\/tr>\r\n
      M48<\/td>\r\n24<\/td>\r\n71<\/td>\r\n45.087<\/td>\r\n44.752<\/td>\r\n43.297<\/td>\r\n42.587<\/td>\r\n<\/tr>\r\n
      M52<\/td>\r\n24<\/td>\r\n71<\/td>\r\n49.087<\/td>\r\n48.752<\/td>\r\n46.681<\/td>\r\n45.971<\/td>\r\n<\/tr>\r\n
      M56<\/td>\r\n28<\/td>\r\n85<\/td>\r\n52.783<\/td>\r\n52.428<\/td>\r\n50.796<\/td>\r\n50.046<\/td>\r\n<\/tr>\r\n
      M60<\/td>\r\n28<\/td>\r\n85<\/td>\r\n56.783<\/td>\r\n56.428<\/td>\r\n54.796<\/td>\r\n54.046<\/td>\r\n<\/tr>\r\n
      M64<\/td>\r\n32<\/td>\r\n95<\/td>\r\n60.478<\/td>\r\n60.103<\/td>\r\n58.305<\/td>\r\n57.505<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\nThese dimensions provide guidance for nut manufacturing, ensuring compatibility with bolts under medium load conditions.\r\n\r\n<\/div>\r\n
      \r\n

      Coarse Pitch External Threads<\/h2>\r\nMedium precision, medium engagement. Tolerance zones: 6h for d \u2264 1.4 mm; 6g for d > 1.4 mm. Limits for major diameter d and pitch diameter d2<\/sub>, with min root radius per GB\/T 197-2003.\r\n
      \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
      Thread<\/th>\r\nEngagement Length<\/th>\r\nMajor Diameter d<\/th>\r\nPitch Diameter d2<\/sub><\/th>\r\nMin Root Radiusa<\/sup><\/th>\r\n<\/tr>\r\n
      ><\/th>\r\n\u2264<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
      M1<\/td>\r\n0.6<\/td>\r\n1.7<\/td>\r\n1<\/td>\r\n0.933<\/td>\r\n0.838<\/td>\r\n0.785<\/td>\r\n0.031<\/td>\r\n<\/tr>\r\n
      M1.2<\/td>\r\n0.6<\/td>\r\n1.7<\/td>\r\n1.2<\/td>\r\n1.133<\/td>\r\n1.038<\/td>\r\n0.985<\/td>\r\n0.031<\/td>\r\n<\/tr>\r\n
      M1.4<\/td>\r\n0.7<\/td>\r\n2<\/td>\r\n1.4<\/td>\r\n1.325<\/td>\r\n1.205<\/td>\r\n1.149<\/td>\r\n0.038<\/td>\r\n<\/tr>\r\n
      M1.6<\/td>\r\n0.8<\/td>\r\n2.6<\/td>\r\n1.581<\/td>\r\n1.496<\/td>\r\n1.354<\/td>\r\n1.291<\/td>\r\n0.044<\/td>\r\n<\/tr>\r\n
      M1.8<\/td>\r\n0.8<\/td>\r\n2.6<\/td>\r\n1.781<\/td>\r\n1.696<\/td>\r\n1.554<\/td>\r\n1.491<\/td>\r\n0.044<\/td>\r\n<\/tr>\r\n
      M2<\/td>\r\n1<\/td>\r\n3<\/td>\r\n1.981<\/td>\r\n1.886<\/td>\r\n1.721<\/td>\r\n1.654<\/td>\r\n0.05<\/td>\r\n<\/tr>\r\n
      M2.5<\/td>\r\n1.3<\/td>\r\n3.8<\/td>\r\n2.48<\/td>\r\n2.38<\/td>\r\n2.188<\/td>\r\n2.117<\/td>\r\n0.056<\/td>\r\n<\/tr>\r\n
      M3<\/td>\r\n1.5<\/td>\r\n4.5<\/td>\r\n2.98<\/td>\r\n2.874<\/td>\r\n2.655<\/td>\r\n2.58<\/td>\r\n0.063<\/td>\r\n<\/tr>\r\n
      M3.5<\/td>\r\n1.7<\/td>\r\n5<\/td>\r\n3.479<\/td>\r\n3.354<\/td>\r\n3.089<\/td>\r\n3.004<\/td>\r\n0.075<\/td>\r\n<\/tr>\r\n
      M4<\/td>\r\n2<\/td>\r\n6<\/td>\r\n3.978<\/td>\r\n3.838<\/td>\r\n3.523<\/td>\r\n3.433<\/td>\r\n0.088<\/td>\r\n<\/tr>\r\n
      M5<\/td>\r\n2.5<\/td>\r\n7.5<\/td>\r\n4.976<\/td>\r\n4.826<\/td>\r\n4.456<\/td>\r\n4.361<\/td>\r\n0.1<\/td>\r\n<\/tr>\r\n
      M6<\/td>\r\n3<\/td>\r\n9<\/td>\r\n5.974<\/td>\r\n5.794<\/td>\r\n5.324<\/td>\r\n5.212<\/td>\r\n0.125<\/td>\r\n<\/tr>\r\n
      M7<\/td>\r\n3<\/td>\r\n9<\/td>\r\n6.974<\/td>\r\n6.794<\/td>\r\n6.324<\/td>\r\n6.212<\/td>\r\n0.125<\/td>\r\n<\/tr>\r\n
      M8<\/td>\r\n4<\/td>\r\n12<\/td>\r\n7.972<\/td>\r\n7.76<\/td>\r\n7.16<\/td>\r\n7.042<\/td>\r\n0.156<\/td>\r\n<\/tr>\r\n
      M10<\/td>\r\n5<\/td>\r\n15<\/td>\r\n9.968<\/td>\r\n9.732<\/td>\r\n8.994<\/td>\r\n8.862<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M12<\/td>\r\n6<\/td>\r\n18<\/td>\r\n11.966<\/td>\r\n11.701<\/td>\r\n10.829<\/td>\r\n10.679<\/td>\r\n0.219<\/td>\r\n<\/tr>\r\n
      M14<\/td>\r\n8<\/td>\r\n24<\/td>\r\n13.962<\/td>\r\n13.682<\/td>\r\n12.663<\/td>\r\n12.503<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M16<\/td>\r\n8<\/td>\r\n24<\/td>\r\n15.962<\/td>\r\n15.682<\/td>\r\n14.663<\/td>\r\n14.503<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M18<\/td>\r\n10<\/td>\r\n30<\/td>\r\n17.958<\/td>\r\n17.623<\/td>\r\n16.334<\/td>\r\n16.164<\/td>\r\n0.313<\/td>\r\n<\/tr>\r\n
      M20<\/td>\r\n10<\/td>\r\n30<\/td>\r\n19.958<\/td>\r\n19.623<\/td>\r\n18.334<\/td>\r\n18.164<\/td>\r\n0.313<\/td>\r\n<\/tr>\r\n
      M22<\/td>\r\n10<\/td>\r\n30<\/td>\r\n21.958<\/td>\r\n21.623<\/td>\r\n20.334<\/td>\r\n20.164<\/td>\r\n0.313<\/td>\r\n<\/tr>\r\n
      M24<\/td>\r\n12<\/td>\r\n36<\/td>\r\n23.952<\/td>\r\n23.577<\/td>\r\n22.003<\/td>\r\n21.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M27<\/td>\r\n12<\/td>\r\n36<\/td>\r\n26.952<\/td>\r\n26.577<\/td>\r\n25.003<\/td>\r\n24.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M30<\/td>\r\n15<\/td>\r\n45<\/td>\r\n29.947<\/td>\r\n29.522<\/td>\r\n27.674<\/td>\r\n27.462<\/td>\r\n0.438<\/td>\r\n<\/tr>\r\n
      M33<\/td>\r\n15<\/td>\r\n45<\/td>\r\n32.947<\/td>\r\n32.522<\/td>\r\n30.674<\/td>\r\n30.462<\/td>\r\n0.438<\/td>\r\n<\/tr>\r\n
      M36<\/td>\r\n18<\/td>\r\n53<\/td>\r\n35.94<\/td>\r\n35.465<\/td>\r\n33.342<\/td>\r\n33.118<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n
      M39<\/td>\r\n18<\/td>\r\n53<\/td>\r\n38.94<\/td>\r\n38.465<\/td>\r\n36.342<\/td>\r\n36.118<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n
      M42<\/td>\r\n21<\/td>\r\n63<\/td>\r\n41.937<\/td>\r\n41.437<\/td>\r\n39.014<\/td>\r\n38.778<\/td>\r\n0.563<\/td>\r\n<\/tr>\r\n
      M45<\/td>\r\n21<\/td>\r\n63<\/td>\r\n44.937<\/td>\r\n44.437<\/td>\r\n42.014<\/td>\r\n41.778<\/td>\r\n0.563<\/td>\r\n<\/tr>\r\n
      M48<\/td>\r\n24<\/td>\r\n71<\/td>\r\n47.929<\/td>\r\n47.399<\/td>\r\n44.681<\/td>\r\n44.431<\/td>\r\n0.625<\/td>\r\n<\/tr>\r\n
      M52<\/td>\r\n24<\/td>\r\n71<\/td>\r\n51.929<\/td>\r\n51.399<\/td>\r\n48.681<\/td>\r\n48.431<\/td>\r\n0.625<\/td>\r\n<\/tr>\r\n
      M56<\/td>\r\n28<\/td>\r\n85<\/td>\r\n55.925<\/td>\r\n55.365<\/td>\r\n52.353<\/td>\r\n52.088<\/td>\r\n0.688<\/td>\r\n<\/tr>\r\n
      M60<\/td>\r\n28<\/td>\r\n85<\/td>\r\n59.925<\/td>\r\n59.365<\/td>\r\n56.353<\/td>\r\n56.088<\/td>\r\n0.688<\/td>\r\n<\/tr>\r\n
      M64<\/td>\r\n32<\/td>\r\n95<\/td>\r\n63.92<\/td>\r\n63.32<\/td>\r\n60.023<\/td>\r\n59.743<\/td>\r\n0.75<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\na<\/sup> See GB\/T 197-2003 Chapter 7 and Table 9 for root radius details. These ensure stress distribution and fatigue resistance.\r\n\r\n<\/div>\r\n
      \r\n

      Fine Pitch Internal Threads<\/h2>\r\nMedium precision, medium engagement, 6H tolerance zone. Fine pitches offer better vibration resistance and adjustment precision.\r\n
      \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
      Thread<\/th>\r\nEngagement Length<\/th>\r\nPitch Diameter D2<\/sub><\/th>\r\nMinor Diameter D1<\/sub><\/th>\r\n<\/tr>\r\n
      ><\/th>\r\n\u2264<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
      M8\u00d71<\/td>\r\n3<\/td>\r\n9<\/td>\r\n7.5<\/td>\r\n7.35<\/td>\r\n7.153<\/td>\r\n6.917<\/td>\r\n<\/tr>\r\n
      M10\u00d71<\/td>\r\n4<\/td>\r\n12<\/td>\r\n9.5<\/td>\r\n9.35<\/td>\r\n9.153<\/td>\r\n8.917<\/td>\r\n<\/tr>\r\n
      M10\u00d71.25<\/td>\r\n4<\/td>\r\n12<\/td>\r\n9.348<\/td>\r\n9.188<\/td>\r\n8.912<\/td>\r\n8.647<\/td>\r\n<\/tr>\r\n
      M12\u00d71.25<\/td>\r\n4.5<\/td>\r\n13<\/td>\r\n11.368<\/td>\r\n11.188<\/td>\r\n10.912<\/td>\r\n10.647<\/td>\r\n<\/tr>\r\n
      M12\u00d71.5<\/td>\r\n4.5<\/td>\r\n13<\/td>\r\n11.216<\/td>\r\n11.026<\/td>\r\n10.676<\/td>\r\n10.376<\/td>\r\n<\/tr>\r\n
      M14\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n13.216<\/td>\r\n13.026<\/td>\r\n12.676<\/td>\r\n12.376<\/td>\r\n<\/tr>\r\n
      M16\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n15.216<\/td>\r\n15.026<\/td>\r\n14.676<\/td>\r\n14.376<\/td>\r\n<\/tr>\r\n
      M18\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n17.216<\/td>\r\n17.026<\/td>\r\n16.676<\/td>\r\n16.376<\/td>\r\n<\/tr>\r\n
      M18\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n16.913<\/td>\r\n16.701<\/td>\r\n16.21<\/td>\r\n15.835<\/td>\r\n<\/tr>\r\n
      M20\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n19.216<\/td>\r\n19.026<\/td>\r\n18.676<\/td>\r\n18.376<\/td>\r\n<\/tr>\r\n
      M20\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n18.913<\/td>\r\n18.701<\/td>\r\n18.21<\/td>\r\n17.835<\/td>\r\n<\/tr>\r\n
      M22\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n21.216<\/td>\r\n21.026<\/td>\r\n20.676<\/td>\r\n20.376<\/td>\r\n<\/tr>\r\n
      M22\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n20.913<\/td>\r\n20.701<\/td>\r\n20.21<\/td>\r\n19.835<\/td>\r\n<\/tr>\r\n
      M24\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n22.925<\/td>\r\n22.701<\/td>\r\n22.21<\/td>\r\n21.835<\/td>\r\n<\/tr>\r\n
      M27\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n25.925<\/td>\r\n25.701<\/td>\r\n25.21<\/td>\r\n24.835<\/td>\r\n<\/tr>\r\n
      M30\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n28.925<\/td>\r\n28.701<\/td>\r\n28.21<\/td>\r\n27.835<\/td>\r\n<\/tr>\r\n
      M33\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n31.925<\/td>\r\n31.701<\/td>\r\n31.21<\/td>\r\n30.835<\/td>\r\n<\/tr>\r\n
      M36\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n34.316<\/td>\r\n34.051<\/td>\r\n33.252<\/td>\r\n32.752<\/td>\r\n<\/tr>\r\n
      M39\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n37.316<\/td>\r\n37.051<\/td>\r\n36.252<\/td>\r\n35.752<\/td>\r\n<\/tr>\r\n
      M42\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n40.316<\/td>\r\n40.051<\/td>\r\n39.252<\/td>\r\n38.752<\/td>\r\n<\/tr>\r\n
      M45\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n43.316<\/td>\r\n43.051<\/td>\r\n42.252<\/td>\r\n41.752<\/td>\r\n<\/tr>\r\n
      M48\u00d73<\/td>\r\n15<\/td>\r\n45<\/td>\r\n46.331<\/td>\r\n46.051<\/td>\r\n45.252<\/td>\r\n44.752<\/td>\r\n<\/tr>\r\n
      M52\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n49.717<\/td>\r\n49.402<\/td>\r\n48.27<\/td>\r\n47.67<\/td>\r\n<\/tr>\r\n
      M56\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n53.717<\/td>\r\n53.402<\/td>\r\n52.27<\/td>\r\n51.67<\/td>\r\n<\/tr>\r\n
      M60\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n57.717<\/td>\r\n57.402<\/td>\r\n56.27<\/td>\r\n55.67<\/td>\r\n<\/tr>\r\n
      M64\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n61.717<\/td>\r\n61.402<\/td>\r\n60.27<\/td>\r\n59.67<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\nThese values support finer load distribution in high-vibration environments.\r\n\r\n<\/div>\r\n
      \r\n

      Fine Pitch External Threads<\/h2>\r\nMedium precision, medium engagement, 6g tolerance zone. Provides stronger core sections for enhanced shear strength.\r\n
      \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
      Thread<\/th>\r\nEngagement Length<\/th>\r\nMajor Diameter d<\/th>\r\nPitch Diameter d2<\/sub><\/th>\r\nMin Root Radiusa<\/sup><\/th>\r\n<\/tr>\r\n
      ><\/th>\r\n\u2264<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmax<\/th>\r\nmin<\/th>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
      M8\u00d71<\/td>\r\n3<\/td>\r\n9<\/td>\r\n7.974<\/td>\r\n7.794<\/td>\r\n7.324<\/td>\r\n7.212<\/td>\r\n0.125<\/td>\r\n<\/tr>\r\n
      M10\u00d71<\/td>\r\n4<\/td>\r\n12<\/td>\r\n9.974<\/td>\r\n9.794<\/td>\r\n9.324<\/td>\r\n9.212<\/td>\r\n0.125<\/td>\r\n<\/tr>\r\n
      M10\u00d71.25<\/td>\r\n4<\/td>\r\n12<\/td>\r\n9.972<\/td>\r\n9.76<\/td>\r\n9.16<\/td>\r\n9.042<\/td>\r\n0.156<\/td>\r\n<\/tr>\r\n
      M12\u00d71.25<\/td>\r\n4.5<\/td>\r\n13<\/td>\r\n11.972<\/td>\r\n11.76<\/td>\r\n11.16<\/td>\r\n11.028<\/td>\r\n0.156<\/td>\r\n<\/tr>\r\n
      M12\u00d71.5<\/td>\r\n4.5<\/td>\r\n13<\/td>\r\n11.968<\/td>\r\n11.732<\/td>\r\n10.994<\/td>\r\n10.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M14\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n13.968<\/td>\r\n13.732<\/td>\r\n12.994<\/td>\r\n12.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M16\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n15.968<\/td>\r\n15.732<\/td>\r\n14.994<\/td>\r\n14.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M18\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n17.968<\/td>\r\n17.732<\/td>\r\n16.994<\/td>\r\n16.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M18\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n17.962<\/td>\r\n17.682<\/td>\r\n16.663<\/td>\r\n16.503<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M20\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n19.968<\/td>\r\n19.732<\/td>\r\n18.994<\/td>\r\n18.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M20\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n19.962<\/td>\r\n19.682<\/td>\r\n18.663<\/td>\r\n18.503<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M22\u00d71.5<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n21.968<\/td>\r\n21.732<\/td>\r\n20.994<\/td>\r\n20.854<\/td>\r\n0.188<\/td>\r\n<\/tr>\r\n
      M22\u00d72<\/td>\r\n5.6<\/td>\r\n16<\/td>\r\n21.962<\/td>\r\n21.682<\/td>\r\n20.663<\/td>\r\n20.503<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M24\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n23.962<\/td>\r\n23.682<\/td>\r\n22.663<\/td>\r\n22.493<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M27\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n26.962<\/td>\r\n26.682<\/td>\r\n25.663<\/td>\r\n25.493<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M30\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n29.962<\/td>\r\n29.682<\/td>\r\n28.663<\/td>\r\n28.493<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M33\u00d72<\/td>\r\n8.5<\/td>\r\n25<\/td>\r\n32.962<\/td>\r\n32.682<\/td>\r\n31.663<\/td>\r\n31.493<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
      M36\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n35.952<\/td>\r\n35.577<\/td>\r\n34.003<\/td>\r\n33.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M39\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n38.952<\/td>\r\n38.577<\/td>\r\n37.003<\/td>\r\n36.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M42\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n41.952<\/td>\r\n41.577<\/td>\r\n40.003<\/td>\r\n39.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M45\u00d73<\/td>\r\n12<\/td>\r\n36<\/td>\r\n44.952<\/td>\r\n44.577<\/td>\r\n43.003<\/td>\r\n42.803<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M48\u00d73<\/td>\r\n15<\/td>\r\n45<\/td>\r\n47.952<\/td>\r\n47.577<\/td>\r\n46.003<\/td>\r\n45.791<\/td>\r\n0.375<\/td>\r\n<\/tr>\r\n
      M52\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n51.94<\/td>\r\n51.465<\/td>\r\n49.342<\/td>\r\n49.106<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n
      M56\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n55.94<\/td>\r\n55.465<\/td>\r\n53.342<\/td>\r\n53.106<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n
      M60\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n59.94<\/td>\r\n59.465<\/td>\r\n57.342<\/td>\r\n57.106<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n
      M64\u00d74<\/td>\r\n19<\/td>\r\n56<\/td>\r\n63.94<\/td>\r\n63.465<\/td>\r\n61.342<\/td>\r\n61.106<\/td>\r\n0.5<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\na<\/sup> See GB\/T 197-2003 for root radius specifications, critical for avoiding stress concentrations.\r\n\r\n<\/div>\r\n
      \r\n

      FAQ<\/h2>\r\n

      What tolerance zones apply to coarse internal threads?<\/h3>\r\n5H for diameters \u22641.4 mm; 6H for >1.4 mm, ensuring medium precision fit.\r\n

      How does plating affect thread dimensions?<\/h3>\r\nTolerances are pre-plating; post-plating profiles must not exceed H\/h positions for thin coatings to maintain assembly.\r\n

      Why use fine pitch threads?<\/h3>\r\nThey provide better vibration resistance and finer adjustments, with stronger cores per limits in tables 3 and 4.\r\n

      What is medium engagement length?<\/h3>\r\nIt balances thread strength and cost; use table values for specific ranges to avoid over- or under-engagement.\r\n

      How to interpret root radius?<\/h3>\r\nMin values per GB\/T 197-2003 reduce stress; essential for fatigue-prone applications.\r\n

      Are these limits for all materials?<\/h3>\r\nYes, but adjust for special platings; consult standard for heavy coatings requiring oversized threads.\r\n\r\n<\/div>\r\n ","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5757","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/posts\/5757","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/comments?post=5757"}],"version-history":[{"count":3,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/posts\/5757\/revisions"}],"predecessor-version":[{"id":5760,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/posts\/5757\/revisions\/5760"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/media?parent=5757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/categories?post=5757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/nl\/wp-json\/wp\/v2\/tags?post=5757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}