未注公差的直徑尺寸公差

1、未注公差尺寸的極限偏差(GB/T1800.1-1997)公稱尺寸公差4亨級(jí)公稱尺寸公差等級(jí)IT10IT11IT12IT13IT14IT10IT11IT12IT13IT14至單位：mm至單位：mm一30.040.060.10.140.253154000.230.360.570.893.60360.0480.0750.120.180.304005000.250.40.630.974.006100.0580.090.150.220.365006300.280.440.71.14.410180.070.110.180.270.436308000.320.50.81.255.018300.0840.13

2、0.210.330.5280010000.360.560.91.45.630500.10.160.250.390.62100012500.420.661.051.656.650800.120.190.30.460.74125016000.50.781.251.957.8801200.140.220.350.540.87160020000.60.921.52.39.21201800.160.250.40.631.00200025000.71.11.752.811.01802500.1850.290.460.721861.352.13.313.52503150.210.3

3、20.520.811.30一一一一一未注公差尺寸的極限中差值(或基本偏差JSjs的土值)公稱尺寸公差等級(jí)公稱尺寸公差等級(jí)IT10/2IT11/2IT12/2IT13/2IT14/2IT10/2IT11/2IT12/2IT13/2IT14/2至單位：mm至單位：mm一30.020.030.050.070.1253154000.1150.180.2850.4451.8360.0240.0370.060.0750.090.154005000.1250.20.3150.350.4852.06100.0290.0450.110.185006300.140.220.552.210180.0350.0550

4、.090.1350.2156308000.160.250.40.6252.518300.0420.0650.1050.1650.2680010000.180.280.450.72.8305050800.050.060.080.0950.1250.150.1950.230.310.37100012500.210.330.5250.6250.8253.3125016000.250.390.9753.9801200.070.110.1750.270.435160020000.300.460.751.154.61201800.080.1250.20.3150.5200025000.350.550.87

5、51.45.51802500.0920.1450.230.260.360.575250031500.430.6751.051.656.752503150.1050.160.4050.65一一一一一未注公差尺寸的(h)-中差值及基本偏差JSjs的士值(GB/T1800.1-1997)公稱尺寸公差等級(jí)IT10IT10/2IT11IT11/2IT12IT12/2IT13IT13/2IT14IT14/2至單位：mm一30.980.020.970.030.950.050.930.070.8750.125360.9760.0240.9630.0370.940.060.910.090.850.156100.

6、9710.0290.9550.0450.9250.0750.890.110.820.1810180.9650.0350.9450.0550.910.090.8650.1350.7850.21518300.9580.0420.9350.0650.8950.1050.8350.1650.740.2630500.950.050.920.080.8750.1250.8050.1950.690.3150800.940.060.9050.0950.850.150.770.230.630.37801200.930.070.890.110.8250.1750.730.270.5650.4351201800.9

7、20.080.8750.1250.80.20.6850.3150.50.51802500.9080.0920.8550.1450.770.230.640.360.4250.5752503150.8950.1050.840.160.740.260.5950.4050.350.653154000.8850.1150.820.180.7150.2850.5550.445-1.84005000.8750.1250.80.20.6850.3150.5150.48525006300.860.140.780.220.650.350.450.55-2.26308000.840.160.750.250.60.4

8、0.3750.6252.580010000.820.180.720.280.550.450.30.7-2.8100012500.790.210.670.330.4750.5250.1750.8253.3125016000.750.250.610.390.3750.6250.0250.975-3.9160020000.70.30.540.460.250.751.154.6200025000.650.350.450.550.1250.875-1.4-5.5250031500.570.430.3250.6751.051.656.75標(biāo)準(zhǔn)公差等級(jí)的選擇公差等級(jí)應(yīng)用條件說(shuō)明應(yīng)用舉例IT10應(yīng)用條件與IT

9、9相類似，但精度要求低于IT9電子儀器儀表中支架上的配合，打字機(jī)中怫合件的配合尺寸，鬧鐘機(jī)構(gòu)中的中心管與前夾板，軸套與軸，手表中尺寸小于18mm寸要求TK的未注公差尺寸及大于18mnE求較高的木注公差尺寸，發(fā)動(dòng)機(jī)中油封檔圈孔與曲軸皮帶輪轂IT11配合精度要求較粗般，裝配后可能肩較大的問(wèn)隙，特別適用于要求問(wèn)隙較大且有顯著變動(dòng)而不會(huì)引起危險(xiǎn)的場(chǎng)合機(jī)床上法蘭盤止口與孔、滑塊與滑移齒輪、凹槽等，農(nóng)業(yè)機(jī)械、機(jī)車車箱部件及沖壓加工的配合零件，鐘表制造中不重要的零件，手表制造用的工具及設(shè)備中的未注公差尺寸，紡織機(jī)械中較粗般的活動(dòng)配合，印染機(jī)械中要求較低的配合，醫(yī)療器械中手術(shù)刀片的配合，磨床制造中的螺紋連接及

10、粗糙的動(dòng)連接，不作測(cè)量基準(zhǔn)用的齒輪頂圓直徑公差I(lǐng)T12配合精度要求很粗糙，裝配后有很大的間隙非配合尺寸及工序間尺寸，發(fā)動(dòng)機(jī)分離桿，手表制造中工藝裝備的未注公差尺寸，計(jì)算機(jī)行業(yè)切削加工中未注公差尺寸的極限偏差，醫(yī)療器械中手術(shù)刀柄的配合，機(jī)床制造中扳手孔與扳手座的連接IT13應(yīng)用條件與IT12相類似非配合尺寸及工序間尺寸，計(jì)算機(jī)、打字機(jī)中切削加工零件及圓片孔、二孔中心距的未注公差尺寸IT14用于非配合尺寸及不包括在尺寸鏈中的尺寸機(jī)床、汽車、拖拉機(jī)、冶金礦山、石油化工、電機(jī)、電器、儀器、儀表、造船、航空、醫(yī)療器械、鐘表、自行車、造紙、紡織機(jī)械等工業(yè)中未注公差尺寸的切削加工零件說(shuō)明：采用（GB/T18

11、00.1-1997）規(guī)定尺寸的一般（未注）公差，應(yīng)在圖樣標(biāo)題欄附近或技術(shù)要求、技術(shù)文件（如企業(yè)標(biāo)準(zhǔn)）中注出標(biāo)準(zhǔn)號(hào)及公差等級(jí)代號(hào)。例如選用IT13等級(jí)時(shí)，標(biāo)注為：未注尺寸公差GB/T1800.1-IT1未注公差線性尺寸的極限偏差數(shù)值表（GB/T1804-2000）公差等級(jí)尺寸分段（單位：mm）0.5336630>301201204004001000>10002000>20004000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5一中等m±0.1±0.1±0.

12、2±0.3±0.5±0.8±1.2±2粗糙c±0.2±0.3±0.5±0.8±1.2±2±3±4v一±0.5±1±1.5±2.5±4±6±8未注公差角度尺寸的極限偏差數(shù)值表（GB/T1804-2000）公差等級(jí)長(zhǎng)度（單位：mm）<10>1050>50120>120400400精密f中等m±1。±30'±20'±10&#

13、39;±5'粗糙c±1°30'±1。±30'±15'±10'v±3°±2±1。±30'±20'未注公差倒角半徑與倒角高度尺寸的極限偏差數(shù)值表（GB/T1804-2000）公差等級(jí)長(zhǎng)度（單位：mm）0.5336>630>30精密f中等m±0.2±0.5士1±2粗糙cv±0.4士1±2±4說(shuō)明：采用GB/T1804規(guī)定線性、角度尺寸的一般（未注

14、）公差，應(yīng)在圖樣標(biāo)題欄附近或技術(shù)要求、技術(shù)文件（如企業(yè)標(biāo)準(zhǔn)）中注出標(biāo)準(zhǔn)號(hào)及公差等級(jí)代號(hào)。例如選用中等級(jí)時(shí)，標(biāo)注為：未注線性、角度尺寸公差GB/T1804-m或未注尺寸公差GB/T1804m公差等級(jí)基本長(zhǎng)度范圍<10>1030>30100>100300>3001000>10003000H0.020.050.10.20.30.4K0.050.10.20.40.60.8L0.10.20.40.81.21.6（單位：mm）垂直度的未注公差值表（GB/T1184-1996）（單位：mm）公差等級(jí)基本長(zhǎng)度范圍<100>100300>3001000>10003000H0.20.30.40.5K0.40.60.81L0.611.52對(duì)稱度的未注公差值表（GB/T1184-1996）（單位：mm）公差等級(jí)基本長(zhǎng)度范圍<100>100