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 d2＝D2＝d-0.640 327P d1＝D1＝d-1.280 654P
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尺寸代号
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每25.4mm
内的牙数
n
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螺距P
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牙高h
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圆弧半径
r≈
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基面上的基本直径
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基准距离
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有效螺
纹长度
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装配余量
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|||
大径
(基准直径)
d＝D
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中径
d2＝D2
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小径
d1＝D1
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余量
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圈数
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|||||||
1／16
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28
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0.907
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0.581
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0.125
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7.723
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7.142
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6.561
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4.0
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6.5
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2.5
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 |
1／8
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28
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0.907
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0.581
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0.125
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9.728
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9.147
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8.566
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4.0
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6.5
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2.5
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1／4
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19
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1.337
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0.856
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0.184
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13.157
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12.301
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11.445
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6.0
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9.7
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3.7
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3／8
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19
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1.337
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0.856
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0.184
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16.662
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15.806
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14.950
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6.4
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10.1
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3.7
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1／2
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14
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1.814
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1.162
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0.249
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20.955
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19.793
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18.631
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8.2
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13.2
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5.0
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3／4
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14
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1.814
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1.162
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0.249
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26.441
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25.279
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24.117
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9.5
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14.5
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5.0
|
|
1
|
11
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2.309
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1.479
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0.317
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33.249
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31.770
|
30.291
|
10.4
|
16.8
|
6.4
|
|
 |
11
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2.309
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1.479
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0.317
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41.910
|
40.431
|
38.952
|
12.7
|
19.1
|
6.4
|
|
 |
11
|
2.309
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1.479
|
0.317
|
47.803
|
46.324
|
44.845
|
12.7
|
19.1
|
6.4
|
|
2
|
11
|
2.309
|
1.479
|
0.317
|
59.614
|
58.135
|
56.656
|
15.9
|
23.4
|
7.5
|
|
 |
11
|
2.309
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1.479
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0.317
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75.184
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73.705
|
72.226
|
17.5
|
26.7
|
9.2
|
4
|
3
|
11
|
2.309
|
1.479
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0.317
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87.884
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86.405
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84.926
|
20.6
|
29.8
|
9.2
|
4
|
4
|
11
|
2.309
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1.479
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0.317
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113.030
|
111.551
|
110.072
|
25.4
|
35.8
|
10.4
|
 |
5
|
11
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2.309
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1.479
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0.317
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138.430
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136.951
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135.472
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28.6
|
40.1
|
11.5
|
5
|
6
|
11
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2.309
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1.479
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0.317
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163.830
|
162.351
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160.872
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28.6
|
40.1
|
11.5
|
5
|
