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亨級公稱尺寸公差等級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)公稱尺寸公差等級公稱尺寸公差等級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標準公差等級的選擇公差等級應(yīng)用條件說明應(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，打字機中怫合件的配合尺寸，鬧鐘機構(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)動機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隙，特別適用于要求問隙較大且有顯著變動而不會引起危險的場合機床上法蘭盤止口與孔、滑塊與滑移齒輪、凹槽等，農(nóng)業(yè)機械、機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，紡織機械中較粗般的活動配合，印染機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、粗糙的動連接，不作測量基準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)動機分離桿，手表制造中工藝裝備的未注公差尺寸，計算機行業(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，計算機、打字機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床、汽車、拖拉機、冶金礦山、石油化工、電機、電器、儀器、儀表、造船、航空、醫(yī)療器械、鐘表、自行車、造紙、紡織機械等工業(yè)中未注公差尺寸的切削加工零件說明：采用（GB/T18

11、00.1-1997）規(guī)定尺寸的一般（未注）公差，應(yīng)在圖樣標題欄附近或技術(shù)要求、技術(shù)文件（如企業(yè)標準）中注出標準號及公差等級代號。例如選用IT13等級時，標注為：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）公差等級長度（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）公差等級長度（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)在圖樣標題欄附近或技術(shù)要求、技術(shù)文件（如企業(yè)標準）中注出標準號及公差等級代號。例如選用中等級時，標注為：未注線性、角度尺寸公差GB/T1804-m或未注尺寸公差GB/T1804m公差等級基本長度范圍<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）公差等級基本長度范圍<100>100300>3001000>10003000H0.20.30.40.5K0.40.60.81L0.611.52對稱度的未注公差值表（GB/T1184-1996）（單位：mm）公差等級基本長度范圍<100>100