{"id":5727,"date":"2025-12-24T03:02:31","date_gmt":"2025-12-24T03:02:31","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5727"},"modified":"2025-12-24T03:02:31","modified_gmt":"2025-12-24T03:02:31","slug":"bolt-screw-stud-length-standards-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/pt\/blog\/bolt-screw-stud-length-standards-guide\/","title":{"rendered":"Guia de padr\u00f5es de comprimento de parafusos e pinos"},"content":{"rendered":"
\n

Sum\u00e1rio do artigo<\/h2>\n

Este guia detalha as normas para comprimentos nominais e comprimentos de rosca de parafusos, porcas e pinos, com base na norma ISO 888:2012 e nas toler\u00e2ncias relacionadas da norma ISO 4759-1. A estrutura \u00e9 a seguinte:<\/p>\n

    \n
  1. Introdu\u00e7\u00e3o aos padr\u00f5es de comprimento<\/li>\n
  2. Padr\u00f5es de Comprimento Nominal<\/li>\n
  3. Padr\u00f5es de comprimento de rosca<\/li>\n
  4. Notas e c\u00e1lculos principais<\/li>\n
  5. Perguntas frequentes (FAQ)<\/li>\n<\/ol>\n<\/div>\n
    \n

    Introdu\u00e7\u00e3o aos padr\u00f5es de comprimento<\/h2>\n

    As normas para comprimentos nominais e comprimentos de rosca de parafusos, porcas e pinos garantem a intercambialidade, a consist\u00eancia do projeto, a gest\u00e3o eficiente de materiais, a melhoria da efici\u00eancia da produ\u00e7\u00e3o e a conformidade com as regulamenta\u00e7\u00f5es do setor. Essas normas, alinhadas com a ISO 888:2012 para comprimentos e a ISO 4759-1 para toler\u00e2ncias, facilitam a fabrica\u00e7\u00e3o e a aplica\u00e7\u00e3o uniformes em setores como o automotivo, o da constru\u00e7\u00e3o civil e o de m\u00e1quinas.<\/p>\n

    A ado\u00e7\u00e3o de comprimentos padronizados minimiza problemas de instala\u00e7\u00e3o, simplifica o estoque e reduz custos. As classes de produto A, B e C definem os n\u00edveis de toler\u00e2ncia, sendo A a mais rigorosa para aplica\u00e7\u00f5es de precis\u00e3o, B para uso geral e C para cen\u00e1rios menos cr\u00edticos.<\/p>\n

      \n
    • Intercambiabilidade: Permite a substitui\u00e7\u00e3o perfeita de pe\u00e7as de diferentes fabricantes.<\/li>\n
    • Consist\u00eancia de projeto: Promove pr\u00e1ticas de engenharia uniformes.<\/li>\n
    • Gest\u00e3o de Materiais: Otimiza o controle de estoque e o processo de aquisi\u00e7\u00e3o.<\/li>\n
    • Efici\u00eancia de produ\u00e7\u00e3o: Otimiza os processos de fabrica\u00e7\u00e3o.<\/li>\n
    • Conformidade regulamentar: Atende \u00e0s normas nacionais e internacionais.<\/li>\n<\/ul>\n

      Estas diretrizes fornecem orienta\u00e7\u00f5es pr\u00e1ticas para a sele\u00e7\u00e3o de comprimentos adequados, garantindo a integridade estrutural e o desempenho em conjuntos fixados.<\/p>\n<\/div>\n

      \n

      Padr\u00f5es de Comprimento Nominal<\/h2>\n

      Os comprimentos nominais para parafusos, porcas e pinos seguem a norma ISO 888:2012, com toler\u00e2ncias conforme a ISO 4759-1. A tabela abaixo lista os comprimentos nominais preferenciais (l) em mm, juntamente com os valores m\u00ednimos e m\u00e1ximos para as classes A, B e C. Evite, sempre que poss\u00edvel, os comprimentos entre par\u00eanteses, pois representam prefer\u00eancias secund\u00e1rias.<\/p>\n

      As toler\u00e2ncias de Grau A s\u00e3o mais rigorosas (js15 para l \u2264 150 mm, js17 para l > 150 mm), adequadas para necessidades de alta precis\u00e3o. O Grau B utiliza js17 uniformemente, equilibrando custo e precis\u00e3o. O Grau C aplica js17 para l \u2264 150 mm e \u00b1IT17 para tamanhos maiores, para aplica\u00e7\u00f5es econ\u00f4micas.<\/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\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
      Comprimento nominal l (mm)<\/th>\nGrau A (mm)<\/th>\nGrau B (mm)<\/th>\nGrau C (mm)<\/th>\n<\/tr>\n
      <\/th>\nMin<\/th>\nM\u00e1ximo<\/th>\nMin<\/th>\nM\u00e1ximo<\/th>\nMin<\/th>\nM\u00e1ximo<\/th>\n<\/tr>\n<\/thead>\n
      2<\/td>\n1.80<\/td>\n2.20<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (2.5)<\/td>\n2.30<\/td>\n2.70<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      3<\/td>\n2.80<\/td>\n3.20<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      4<\/td>\n3.76<\/td>\n4.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      5<\/td>\n4.76<\/td>\n5.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      6<\/td>\n5.76<\/td>\n6.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (7)<\/td>\n6.71<\/td>\n7.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      8<\/td>\n7.71<\/td>\n8.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (9)<\/td>\n8.71<\/td>\n9.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      10<\/td>\n9.71<\/td>\n10.29<\/td>\n9.25<\/td>\n10.75<\/td>\n9.25<\/td>\n10.75<\/td>\n<\/tr>\n
      (11)<\/td>\n10.65<\/td>\n11.35<\/td>\n10.10<\/td>\n11.90<\/td>\n10.10<\/td>\n11.90<\/td>\n<\/tr>\n
      12<\/td>\n11.65<\/td>\n12.35<\/td>\n11.10<\/td>\n12.90<\/td>\n11.10<\/td>\n12.90<\/td>\n<\/tr>\n
      (14)<\/td>\n13.65<\/td>\n14.35<\/td>\n13.10<\/td>\n14.90<\/td>\n13.10<\/td>\n14.90<\/td>\n<\/tr>\n
      16<\/td>\n15.65<\/td>\n16.35<\/td>\n15.10<\/td>\n16.90<\/td>\n15.10<\/td>\n16.90<\/td>\n<\/tr>\n
      (18)<\/td>\n17.65<\/td>\n18.35<\/td>\n17.10<\/td>\n18.90<\/td>\n17.10<\/td>\n18.90<\/td>\n<\/tr>\n
      20<\/td>\n19.58<\/td>\n20.42<\/td>\n18.95<\/td>\n21.05<\/td>\n18.95<\/td>\n21.05<\/td>\n<\/tr>\n
      (22)<\/td>\n21.58<\/td>\n22.42<\/td>\n20.95<\/td>\n23.05<\/td>\n20.95<\/td>\n23.05<\/td>\n<\/tr>\n
      25<\/td>\n24.58<\/td>\n25.42<\/td>\n23.95<\/td>\n26.05<\/td>\n23.95<\/td>\n26.05<\/td>\n<\/tr>\n
      (28)<\/td>\n27.58<\/td>\n28.42<\/td>\n26.95<\/td>\n29.05<\/td>\n26.95<\/td>\n29.05<\/td>\n<\/tr>\n
      30<\/td>\n29.58<\/td>\n30.42<\/td>\n28.95<\/td>\n31.05<\/td>\n28.95<\/td>\n31.05<\/td>\n<\/tr>\n
      (32)<\/td>\n31.50<\/td>\n32.50<\/td>\n30.75<\/td>\n33.25<\/td>\n30.75<\/td>\n33.25<\/td>\n<\/tr>\n
      35<\/td>\n34.50<\/td>\n35.50<\/td>\n33.75<\/td>\n36.25<\/td>\n33.75<\/td>\n36.25<\/td>\n<\/tr>\n
      (38)<\/td>\n37.50<\/td>\n38.50<\/td>\n36.75<\/td>\n39.25<\/td>\n36.75<\/td>\n39.25<\/td>\n<\/tr>\n
      40<\/td>\n39.50<\/td>\n40.50<\/td>\n38.75<\/td>\n41.25<\/td>\n38.75<\/td>\n41.25<\/td>\n<\/tr>\n
      45<\/td>\n44.50<\/td>\n45.50<\/td>\n43.75<\/td>\n46.25<\/td>\n43.75<\/td>\n46.25<\/td>\n<\/tr>\n
      50<\/td>\n49.50<\/td>\n50.50<\/td>\n48.75<\/td>\n51.25<\/td>\n48.75<\/td>\n51.25<\/td>\n<\/tr>\n
      55<\/td>\n54.40<\/td>\n55.60<\/td>\n53.50<\/td>\n56.50<\/td>\n53.50<\/td>\n56.50<\/td>\n<\/tr>\n
      60<\/td>\n59.40<\/td>\n60.60<\/td>\n58.50<\/td>\n61.50<\/td>\n58.50<\/td>\n61.50<\/td>\n<\/tr>\n
      65<\/td>\n64.40<\/td>\n65.60<\/td>\n63.50<\/td>\n66.50<\/td>\n63.50<\/td>\n66.50<\/td>\n<\/tr>\n
      70<\/td>\n69.40<\/td>\n70.60<\/td>\n68.50<\/td>\n71.50<\/td>\n68.50<\/td>\n71.50<\/td>\n<\/tr>\n
      (75)<\/td>\n74.40<\/td>\n75.60<\/td>\n73.50<\/td>\n76.50<\/td>\n73.50<\/td>\n76.50<\/td>\n<\/tr>\n
      80<\/td>\n79.40<\/td>\n80.60<\/td>\n78.50<\/td>\n81.50<\/td>\n78.50<\/td>\n81.50<\/td>\n<\/tr>\n
      (85)<\/td>\n84.30<\/td>\n85.70<\/td>\n83.25<\/td>\n86.75<\/td>\n83.25<\/td>\n86.75<\/td>\n<\/tr>\n
      90<\/td>\n89.30<\/td>\n90.70<\/td>\n88.25<\/td>\n91.75<\/td>\n88.25<\/td>\n91.75<\/td>\n<\/tr>\n
      (95)<\/td>\n94.30<\/td>\n95.70<\/td>\n93.25<\/td>\n96.75<\/td>\n93.25<\/td>\n96.75<\/td>\n<\/tr>\n
      100<\/td>\n99.30<\/td>\n100.70<\/td>\n98.25<\/td>\n101.75<\/td>\n98.25<\/td>\n101.75<\/td>\n<\/tr>\n
      (105)<\/td>\n104.30<\/td>\n105.70<\/td>\n103.25<\/td>\n106.75<\/td>\n103.25<\/td>\n106.75<\/td>\n<\/tr>\n
      110<\/td>\n109.30<\/td>\n110.70<\/td>\n108.25<\/td>\n111.75<\/td>\n108.25<\/td>\n111.75<\/td>\n<\/tr>\n
      (115)<\/td>\n114.30<\/td>\n115.70<\/td>\n113.25<\/td>\n116.75<\/td>\n113.25<\/td>\n116.75<\/td>\n<\/tr>\n
      120<\/td>\n119.30<\/td>\n120.70<\/td>\n118.25<\/td>\n121.75<\/td>\n118.25<\/td>\n121.75<\/td>\n<\/tr>\n
      (125)<\/td>\n124.20<\/td>\n125.80<\/td>\n123.00<\/td>\n127.00<\/td>\n123.00<\/td>\n127.00<\/td>\n<\/tr>\n
      130<\/td>\n129.20<\/td>\n130.80<\/td>\n128.00<\/td>\n132.00<\/td>\n128.00<\/td>\n132.00<\/td>\n<\/tr>\n
      140<\/td>\n139.20<\/td>\n140.80<\/td>\n138.00<\/td>\n142.00<\/td>\n138.00<\/td>\n142.00<\/td>\n<\/tr>\n
      150<\/td>\n149.20<\/td>\n150.80<\/td>\n148.00<\/td>\n152.00<\/td>\n148.00<\/td>\n152.00<\/td>\n<\/tr>\n
      160<\/td>\n159.20<\/td>\n160.80<\/td>\n158.00<\/td>\n162.00<\/td>\n158.00<\/td>\n162.00<\/td>\n<\/tr>\n
      (170)<\/td>\n169.20<\/td>\n170.80<\/td>\n168.00<\/td>\n172.00<\/td>\n166.00<\/td>\n174.00<\/td>\n<\/tr>\n
      180<\/td>\n179.20<\/td>\n180.80<\/td>\n178.00<\/td>\n182.00<\/td>\n176.00<\/td>\n184.00<\/td>\n<\/tr>\n
      (190)<\/td>\n189.10<\/td>\n190.90<\/td>\n187.70<\/td>\n192.30<\/td>\n185.40<\/td>\n194.60<\/td>\n<\/tr>\n
      200<\/td>\n199.10<\/td>\n200.90<\/td>\n197.70<\/td>\n202.30<\/td>\n195.40<\/td>\n204.60<\/td>\n<\/tr>\n
      220<\/td>\n219.10<\/td>\n220.90<\/td>\n217.70<\/td>\n222.30<\/td>\n215.40<\/td>\n224.60<\/td>\n<\/tr>\n
      240<\/td>\n239.10<\/td>\n240.90<\/td>\n237.70<\/td>\n242.30<\/td>\n235.40<\/td>\n244.60<\/td>\n<\/tr>\n
      260<\/td>\n–<\/td>\n–<\/td>\n257.40<\/td>\n262.60<\/td>\n254.80<\/td>\n265.20<\/td>\n<\/tr>\n
      280<\/td>\n–<\/td>\n–<\/td>\n277.40<\/td>\n282.60<\/td>\n274.80<\/td>\n285.20<\/td>\n<\/tr>\n
      300<\/td>\n–<\/td>\n–<\/td>\n297.40<\/td>\n302.60<\/td>\n294.80<\/td>\n305.20<\/td>\n<\/tr>\n
      320<\/td>\n–<\/td>\n–<\/td>\n317.15<\/td>\n322.85<\/td>\n314.30<\/td>\n325.70<\/td>\n<\/tr>\n
      340<\/td>\n–<\/td>\n–<\/td>\n337.15<\/td>\n342.85<\/td>\n334.30<\/td>\n345.70<\/td>\n<\/tr>\n
      360<\/td>\n–<\/td>\n–<\/td>\n357.15<\/td>\n362.85<\/td>\n354.30<\/td>\n365.70<\/td>\n<\/tr>\n
      380<\/td>\n–<\/td>\n–<\/td>\n377.15<\/td>\n382.85<\/td>\n374.30<\/td>\n385.70<\/td>\n<\/tr>\n
      400<\/td>\n–<\/td>\n–<\/td>\n397.15<\/td>\n402.85<\/td>\n394.30<\/td>\n405.70<\/td>\n<\/tr>\n
      420<\/td>\n–<\/td>\n–<\/td>\n416.85<\/td>\n423.15<\/td>\n413.70<\/td>\n426.30<\/td>\n<\/tr>\n
      440<\/td>\n–<\/td>\n–<\/td>\n436.85<\/td>\n443.15<\/td>\n433.70<\/td>\n446.30<\/td>\n<\/tr>\n
      460<\/td>\n–<\/td>\n–<\/td>\n456.85<\/td>\n463.15<\/td>\n453.70<\/td>\n466.30<\/td>\n<\/tr>\n
      480<\/td>\n–<\/td>\n–<\/td>\n476.85<\/td>\n483.15<\/td>\n473.70<\/td>\n486.30<\/td>\n<\/tr>\n
      500<\/td>\n–<\/td>\n–<\/td>\n496.85<\/td>\n503.15<\/td>\n493.70<\/td>\n506.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Selecione os comprimentos com base nos requisitos da aplica\u00e7\u00e3o, priorizando os valores sem par\u00eanteses para uma padroniza\u00e7\u00e3o ideal.<\/p>\n<\/div>\n

      \n

      Padr\u00f5es de comprimento de rosca<\/h2>\n

      Os comprimentos de rosca (b) para parafusos, porcas e prisioneiros s\u00e3o especificados nas normas ISO 888:2012 e GB\/T 3106-2016, representando a por\u00e7\u00e3o roscada para fixadores com rosca parcial. A tabela abaixo fornece valores para di\u00e2metros nominais (d) de 1,6 mm a 160 mm, categorizados por faixas de comprimento total (l).<\/p>\n

      Essas normas garantem o engate adequado da rosca para uma fixa\u00e7\u00e3o segura, minimizando o uso de material. Para c\u00e1lculos, utilize f\u00f3rmulas quando os valores da tabela n\u00e3o estiverem listados e considere a rosca completa se a haste sem rosca for \u2264 0,5d.<\/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\n\n\n\n\n\n\n\n\n\n
      Di\u00e2metro nominal d (mm)<\/th>\nl \u2264 125 (mm)<\/th>\n125 < l \u2264 200 (mm)<\/th>\nl > 200 (mm)<\/th>\n<\/tr>\n<\/thead>\n
      1.6<\/td>\n9<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      2<\/td>\n10<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      2.5<\/td>\n11<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      3<\/td>\n12<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      4<\/td>\n14<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      5<\/td>\n16<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      6<\/td>\n18<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      8<\/td>\n22<\/td>\n28<\/td>\n–<\/td>\n<\/tr>\n
      10<\/td>\n26<\/td>\n32<\/td>\n–<\/td>\n<\/tr>\n
      12<\/td>\n30<\/td>\n36<\/td>\n–<\/td>\n<\/tr>\n
      (14)<\/td>\n34<\/td>\n40<\/td>\n–<\/td>\n<\/tr>\n
      16<\/td>\n38<\/td>\n44<\/td>\n57<\/td>\n<\/tr>\n
      18<\/td>\n42<\/td>\n48<\/td>\n61<\/td>\n<\/tr>\n
      20<\/td>\n46<\/td>\n52<\/td>\n65<\/td>\n<\/tr>\n
      22<\/td>\n50<\/td>\n56<\/td>\n69<\/td>\n<\/tr>\n
      24<\/td>\n54<\/td>\n60<\/td>\n73<\/td>\n<\/tr>\n
      27<\/td>\n60<\/td>\n66<\/td>\n79<\/td>\n<\/tr>\n
      30<\/td>\n66<\/td>\n72<\/td>\n85<\/td>\n<\/tr>\n
      33<\/td>\n72<\/td>\n78<\/td>\n91<\/td>\n<\/tr>\n
      36<\/td>\n78<\/td>\n84<\/td>\n97<\/td>\n<\/tr>\n
      39<\/td>\n84<\/td>\n90<\/td>\n103<\/td>\n<\/tr>\n
      42<\/td>\n90<\/td>\n96<\/td>\n109<\/td>\n<\/tr>\n
      45<\/td>\n96<\/td>\n102<\/td>\n115<\/td>\n<\/tr>\n
      48<\/td>\n102<\/td>\n108<\/td>\n121<\/td>\n<\/tr>\n
      52<\/td>\n–<\/td>\n116<\/td>\n129<\/td>\n<\/tr>\n
      56<\/td>\n–<\/td>\n124<\/td>\n137<\/td>\n<\/tr>\n
      60<\/td>\n–<\/td>\n132<\/td>\n145<\/td>\n<\/tr>\n
      64<\/td>\n–<\/td>\n140<\/td>\n153<\/td>\n<\/tr>\n
      68<\/td>\n–<\/td>\n148<\/td>\n161<\/td>\n<\/tr>\n
      72<\/td>\n–<\/td>\n156<\/td>\n169<\/td>\n<\/tr>\n
      76<\/td>\n–<\/td>\n164<\/td>\n177<\/td>\n<\/tr>\n
      80<\/td>\n–<\/td>\n172<\/td>\n185<\/td>\n<\/tr>\n
      85<\/td>\n–<\/td>\n182<\/td>\n195<\/td>\n<\/tr>\n
      90<\/td>\n–<\/td>\n192<\/td>\n205<\/td>\n<\/tr>\n
      95<\/td>\n–<\/td>\n–<\/td>\n215<\/td>\n<\/tr>\n
      100<\/td>\n–<\/td>\n–<\/td>\n225<\/td>\n<\/tr>\n
      105<\/td>\n–<\/td>\n–<\/td>\n235<\/td>\n<\/tr>\n
      110<\/td>\n–<\/td>\n–<\/td>\n245<\/td>\n<\/tr>\n
      115<\/td>\n–<\/td>\n–<\/td>\n255<\/td>\n<\/tr>\n
      120<\/td>\n–<\/td>\n–<\/td>\n265<\/td>\n<\/tr>\n
      125<\/td>\n–<\/td>\n–<\/td>\n275<\/td>\n<\/tr>\n
      130<\/td>\n–<\/td>\n–<\/td>\n285<\/td>\n<\/tr>\n
      140<\/td>\n–<\/td>\n–<\/td>\n305<\/td>\n<\/tr>\n
      150<\/td>\n–<\/td>\n–<\/td>\n325<\/td>\n<\/tr>\n
      160<\/td>\n–<\/td>\n–<\/td>\n345<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Utilize esses valores para determinar o engate da rosca, garantindo seguran\u00e7a e efici\u00eancia no projeto.<\/p>\n<\/div>\n

      \n

      Notas e c\u00e1lculos principais<\/h2>\n

      Considera\u00e7\u00f5es essenciais para a aplica\u00e7\u00e3o dessas normas incluem:<\/p>\n

        \n
      • Calcule o comprimento da rosca b, a menos que especificado de outra forma: Para l \u2264 125 mm, b = 2d + 6 mm; para 125 mm 200 mm, b = 2d + 25 mm.<\/li>\n
      • Se a haste sem rosca for \u2264 0,5d, fabrique com rosca completa.<\/li>\n
      • Toler\u00e2ncias para o comprimento da rosca b de acordo com a norma ISO 4759-1: Para parafusos e pinos com fenda ou rebaixados, +2P \/ 0 (onde P \u00e9 o passo).<\/li>\n
      • Evite usar comprimentos nominais entre par\u00eanteses para melhor padroniza\u00e7\u00e3o.<\/li>\n
      • Estas regras aplicam-se a roscas m\u00e9tricas ISO, de acordo com a norma ISO 68-1.<\/li>\n<\/ul>\n

        Estas notas orientam a fabrica\u00e7\u00e3o e a sele\u00e7\u00e3o precisas, aumentando a confiabilidade em conjuntos mec\u00e2nicos.<\/p>\n<\/div>\n

        \n

        Perguntas frequentes (FAQ)<\/h2>\n
          \n
        1. Qual \u00e9 o objetivo de padronizar os comprimentos nominais?<\/strong>
          \nA padroniza\u00e7\u00e3o garante a intercambialidade, simplifica o projeto e otimiza a produ\u00e7\u00e3o, reduzindo custos e erros na montagem.<\/li>\n
        2. Quais s\u00e3o as diferen\u00e7as de toler\u00e2ncia entre os graus de produto A, B e C?<\/strong>
          \nA classe A possui as toler\u00e2ncias mais rigorosas em termos de precis\u00e3o; a classe B oferece precis\u00e3o equilibrada; a classe C \u00e9 mais flex\u00edvel para aplica\u00e7\u00f5es com restri\u00e7\u00f5es de custo.<\/li>\n
        3. Quando devem ser utilizados fixadores totalmente roscados?<\/strong>
          \nSe os c\u00e1lculos resultarem em uma haste sem rosca \u2264 0,5d, opte pela rosca completa para manter a resist\u00eancia e a simplicidade.<\/li>\n
        4. Por que evitar o uso de par\u00eanteses para indicar o comprimento?<\/strong>
          \nS\u00e3o prefer\u00eancias secund\u00e1rias; priorizar comprimentos sem par\u00eanteses promove consist\u00eancia e disponibilidade.<\/li>\n
        5. Como calcular o comprimento da rosca para tamanhos n\u00e3o tabelados?<\/strong>
          \nUtilize as f\u00f3rmulas: b = 2d + 6 mm (l \u2264 125 mm), b = 2d + 12 mm (125 200 mm).<\/li>\n
        6. Quais s\u00e3o as toler\u00e2ncias aplic\u00e1veis \u200b\u200bao comprimento das roscas?<\/strong>
          \nDe acordo com a norma ISO 4759-1, para parafusos e pinos com encaixe, as toler\u00e2ncias garantem a fixa\u00e7\u00e3o adequada; para tipos com fenda, +2P \/ 0.<\/li>\n<\/ol>\n<\/div>\n

           <\/p>","protected":false},"excerpt":{"rendered":"

          Article Outline This guide details standards for nominal lengths and thread lengths of bolts, screws, and studs, based on ISO 888:2012 and related tolerances from ISO 4759-1. The structure is as follows: Introduction to Length Standards Nominal Length Standards Thread Length Standards Key Notes and Calculations Frequently Asked Questions (FAQ) Introduction to Length Standards Standards […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5727","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5727","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/comments?post=5727"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5727\/revisions"}],"predecessor-version":[{"id":5729,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5727\/revisions\/5729"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/media?parent=5727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/categories?post=5727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/tags?post=5727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}