GBT145中心孔-标准表

(0.5)

1.06

1021.2(0.63) 1.32(0.8) 1.71 3.151 2.12(1.25)4(1.25) 2.65 1.651.6 3.352 6.32 4.25 2.582.5 5.3 3.15103.15 6.7412.548.5(5)16(5)10.6 6.3186.313.2(8)22.4(8)

17

10

28

L1L2max min M3 3.2 5.85 2.6 1.80.231

2.12 2.3

3.15 2.5M4

4.37.4 6.4 3.2 2.10.29(1.25) 2.65 2.84 2.15M5

5.38.87.74 2.40.32 1.6 3.35 3.554M6

6.410.59.25 2.80.372 4.25 4.4 6.35M88.413.211.76 3.30.43 2.5 5.3 5.58 6.3M1010.516.314.2

7.5 3.80.61 2.15 6.77108M121319.817.29.5 4.40.744

8.58.912.510M161725.32212 5.20.91510.611.21612.5M202131.326.9415 6.4 1.26 6.313.2142016M24

25

38

32.36

18

8 1.63

8

17

17.9

25

20

11.66

8.7

注：1.A、B型中心孔的尺寸L却决于中心钻的长度，不应小于t值。2.括号内的尺寸尽量不采用

7.36 5.59.3674.45.55.98 5.05 3.56.41 4.43.2 2.24.03 2.8A 型

A 型

1.270.97

9.78.7B 型1.6 1.13.94.85 1.99 1.42.54 1.82.83.51.11.42.423.070.50.60.70.91.82.2D D1参 考

L1t 7.79

0.480.60.780.97D3L D D1参 考

L1t 1.211.521.95D 参 考C 型

R 型D1L min r D D1D2