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普通螺紋 中等精度、優(yōu)選系列的極限尺寸(GB/T 9145 - 2003)

  • 5 極限尺寸


        內(nèi)、外螺紋牙底輪廓上的任何點(diǎn)不應(yīng)超越按基本牙型和公差帶位置所確定的最大實(shí)體牙型。
        如無(wú)其他特殊說(shuō)明,公差帶適用于涂鍍前螺紋。涂鍍后,螺紋實(shí)際輪廓上的任何點(diǎn)不應(yīng)超越按公差帶位置 H 或 h 所確定的最大實(shí)體牙型。
        注:公差帶僅適用于薄涂鍍層的螺紋。例如電鍍螺紋。
    5.1 粗牙內(nèi)螺紋

        公差精度:中等;
        旋合長(zhǎng)度:中等;
        公差帶:5H —— 公稱直徑小于和等于1.4 mm;6H —— 公稱直徑大于 1.4 mm。

        粗牙內(nèi)螺紋中徑和小徑的極限尺寸值見(jiàn)表 1。

    表 1     粗牙內(nèi)螺紋中徑和小徑的極限尺寸(單位:毫米)

    螺紋旋合長(zhǎng)度中徑 D?小徑 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 粗牙外螺紋
        公差精度:中等;
        旋合長(zhǎng)度:中等;
        公差帶:6 h —— 公稱直徑小于和等于 1.4 mm;6 g —— 公稱直徑大于 1.4 mm。

        粗牙外螺紋大徑和中徑的極限尺寸值見(jiàn)表 2。

    表 2    粗牙外螺紋大徑和中徑的極限尺寸(單位:毫米)

    螺紋旋合長(zhǎng)度大徑 d中徑 d?牙底圓弧半徑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   有關(guān)規(guī)定見(jiàn) GB/T 197 - 2003 的第 7 章和表 9。

    5.3 細(xì)牙內(nèi)螺紋
        公差精度:中等;
        旋合長(zhǎng)度:中等;
        公差帶:6H。

        細(xì)牙內(nèi)螺紋中徑和小徑的極限尺寸值見(jiàn)表 3。

    表 3    細(xì)牙內(nèi)螺紋中徑和小徑的極限尺寸(單位:毫米)

    螺紋旋合長(zhǎng)度中徑 D?小徑 D?
    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 細(xì)牙外螺紋
        公差精度:中等;
        旋合長(zhǎng)度:中等;
        公差帶:6 g。

        細(xì)牙外螺紋大徑和中徑的極限尺寸值見(jiàn)表 4。

    表 4    細(xì)牙外螺紋大徑和中徑的極限尺寸(單位:毫米)

    螺紋旋合長(zhǎng)度大徑 d中徑 d?牙底圓弧半徑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   有關(guān)規(guī)定見(jiàn) GB/T 197 - 2003 的第 7 章和表 9。

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