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普通螺纹 中等精度、优选系列的极限尺寸(GB/T 9145 - 2003)

  • 5 极限尺寸


        内、外螺纹牙底轮廓上的任何点不应超越按基本牙型和公差带位置所确定的最大实体牙型。
        如无其他特殊说明,公差带适用于涂镀前螺纹。涂镀后,螺纹实际轮廓上的任何点不应超越按公差带位置 H 或 h 所确定的最大实体牙型。
        注:公差带仅适用于薄涂镀层的螺纹。例如电镀螺纹。
    5.1 粗牙内螺纹

        公差精度:中等;
        旋合长度:中等;
        公差带:5H —— 公称直径小于和等于1.4 mm;6H —— 公称直径大于 1.4 mm。

        粗牙内螺纹中径和小径的极限尺寸值见表 1。

    表 1     粗牙内螺纹中径和小径的极限尺寸(单位:毫米)

    螺纹旋合长度中径 D小径 D
    maxminmaxmin
    M10.61.70.8940.8380.7850.729
    M1.20.61.71.0941.0380.9850.929
    M1.40.721.2651.2051.1421.075
    M1.60.82.61.4581.3731.3211.221
    M1.80.82.61.6581.5731.5211.421
    M2131.8301.7401.6791.567
    M2.51.33.82.3032.2082.1382.013
    M31.54.52.7752.6752.5992.459
    M3.51.753.2223.1103.0102.850
    M4263.6633.5453.4223.242
    M52.57.54.6054.4804.3344.134
    M6395.5005.3505.1534.917
    M7396.5006.3506.1535.917
    M84127.3487.1886.9126.647
    M105159.2069.0268.6768.376
    M1261811.06310.86310.44110.106
    M1482412.91312.70112.21011.835
    M1682414.91314.70114.21013.835
    M18103016.60016.37615.74415.294
    M20103018.60018.37617.74417.294
    M22103020.60020.37619.74419.294
    M24123622.31622.05121.25220.752
    M27123625.31625.05124.25223.752
    M30154528.00727.72726.77126.211
    M33154531.00730.72729.77129.211
    M36185333.70233.40232.27031.670
    M39185336.70236.40235.27034.670
    M42216339.39239.07737.79937.129
    M45216342.39242.07740.79940.129
    M48247145.08744.75243.29742.587
    M52247149.08748.75241.29746.587
    M56288552.78352.42850.79650.046
    M60288556.78356.42854.79654.046
    M64329560.47860.10358.30557.505

    5.2 粗牙外螺纹
        公差精度:中等;
        旋合长度:中等;
        公差带:6 h —— 公称直径小于和等于 1.4 mm;6 g —— 公称直径大于 1.4 mm。

        粗牙外螺纹大径和中径的极限尺寸值见表 2。

    表 2    粗牙外螺纹大径和中径的极限尺寸(单位:毫米)

    螺纹旋合长度大径 d中径 d₂牙底圆弧半径a
    maxminmaxminmin
    M10.61.71.0000.9330.8380.7850.031
    M1.20.61.71.2001.1331.0380.9850.031
    M1.40.721.4001.3251.2051.1490.038
    M1.60.82.61.5811.4961.3541.2910.044
    M1.80.82.61.7811.6961.5541.4910.044
    M2131.9811.8861.7211.6540.050
    M2.51.33.82.4802.3802.1882.1170.056
    M31.54.52.9802.8742.6552.5800.063
    M3.51.753.4793.3543.0893.0040.075
    M4263.9783.8383.5233.4330.088
    M52.57.54.9764.8264.4564.3610.100
    M6395.9745.7945.3245.2120.125
    M7396.9746.7946.3246.2120.125
    M84127.9727.7607.1607.0420.156
    M105159.9689.7328.9948.8620.188
    M1261811.96611.70110.82910.6790.219
    M1482413.96213.68212.66312.5030.250
    M1682415.96215.68214.66314.5030.250
    M18103017.95817.62316.33416.1640.313
    M20103019.95819.62318.33418.1640.313
    M22103021.95821.62320.33420.1640.313
    M24123623.95223.57722.00321.8030.375
    M27123626.95226.57725.00324.8030.375
    M30154529.94729.52227.67421.4620.438
    M33154532.94732.52230.67430.4620.438
    M36185335.94035.46533.34233.1180.500
    M39185338.94038.46536.34236.1180.500
    M42216341.93741.43739.01438.7780.563
    M45216344.93744.43742.01441.7780.563
    M48247147.92947.39944.68144.4310.625
    M52247151.92951.39948.68148.4310.625
    M56288555.92555.36552.35352.0880.688
    M60288559.92559.36556.35356.0880.688
    M64329563.92063.32060.02359.7430.750

        a   有关规定见 GB/T 197 - 2003 的第 7 章和表 9。

    5.3 细牙内螺纹
        公差精度:中等;
        旋合长度:中等;
        公差带:6H。

        细牙内螺纹中径和小径的极限尺寸值见表 3。

    表 3    细牙内螺纹中径和小径的极限尺寸(单位:毫米)

    螺纹旋合长度中径 D₂小径 D₁
    maxminmaxmin
    M8×1397.5007.3507.1536.917
    M10×14129.5009.3509.1538.917
    M10×1.254129.3489.1888.9128.647
    M12×1.254.51311.36811.18810.91210.647
    M12×1.54.51311.21611.02610.67610.376
    M14×1.55.61613.21613.02612.67612.376
    M16×1.55.61615.21615.02614.67614.376
    M18×1.55.61617.21617.02616.67616.376
    M18×25.61616.91316.70116.21015.835
    M20×1.55.61619.21619.02618.67618.376
    M20×25.61618.91318.70118.21017.835
    M22×1.55.61621.21621.02620.67620.376
    M22×25.61620.91320.70120.21019.835
    M24×28.52522.92522.70122.21021.835
    M27×28.52525.92525.70125.21024.835
    M30×28.52528.92528.70128.21027.835
    M33×28.52531.92531.70131.21030.835
    M36×3123634.31634.05133.25232.752
    M39×3123637.31637.05136.25235.752
    M42×3123640.31640.05139.25238.752
    M45×3123643.31643. 05142.25241.752
    M48×3154546.33146.05145.25244.752
    M52×4195649.71749.40248.27047.670
    M56×4195653.71753.40252.27051.670
    M60×4195657.71757.40256.27055.670
    M64×4195661.71761.40260.27059.670

    5.4 细牙外螺纹
        公差精度:中等;
        旋合长度:中等;
        公差带:6 g。

        细牙外螺纹大径和中径的极限尺寸值见表 4。

    表 4    细牙外螺纹大径和中径的极限尺寸(单位:毫米)

    螺纹旋合长度大径 d中径 d₂牙底圆弧半径a
    maxminmaxminmin
    M8×1397.9747.7947.3247.2120.125
    M10×14129.9749.7949.3249.2120.125
    M10×1.254129.9729.7609.1609.0420.156
    M12×1.254.51311.97211.76011.16011.0280.156
    M12×1.54.51311.96811.73210.99410.8540.188
    M14×1.55.61613.96813.73212.99412.8540.188
    M16×1.55.61615.96815.73214.99414.8540.188
    M18×1.55.61617.96817.73216.99416.8540.188
    M18×25.61617.96217.68216.66316.5030.250
    M20×1.55.61619.96819.73218.99418.8540.188
    M20×25.61619.96219.68218.66318.5030.250
    M22×1.55.61621.96821.73220.99420.8540.188
    M22×25.61621.96221.68220.66320.5030.250
    M24×28.52523.96223.68222.66322.4930.250
    M27×28.52526.96226.68225.66325.4930.250
    M30×28.52529.96229.68228.66328.4930.250
    M33×28.52532.96232.68231.66331.4930.250
    M36×3123635.95235.57734.00333.8030.375
    M39×3123638.95238.57737.00336.8030.375
    M42×3123641.95241.57740.00339.8030.375
    M45×3123644.95244.57743.00342.8030.375
    M48×3154547.95247.57746.00345.7910.375
    M52×4195651.94051.46549.34249.1060.500
    M56×4195655.94055.46553.34253.1060.500
    M60×4195659.94059.46557.34257.1060.500
    M64×4195663.94063.46561.34261.1060.500

        a   有关规定见 GB/T 197 - 2003 的第 7 章和表 9。

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注:数据仅供参考!
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