螺纹尺寸公差.docx
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螺纹尺寸公差.docx
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螺纹尺寸公差
日期:
M米制粗牙螺纹基本牙型与尺寸和公差带
H二琴P=0.866025F
Hi=-|=H=0.br3F
H2=^H=Q,61343Pd2=D2=d-0.51952Pdi=d-2H=d-1.22687Prw丨=[■.11434-
6
V
、、7
—X虻
z/X^/
代号(大径)
d=D
螺距
P
螺纹中径
d2=D2
外螺纹小径
d1
内螺纹小径
D1
外螺纹
全齿高
H2
配合齿高
H1
螺纹中径尺寸
(6H公差带级别)
丝锥螺纹中径
(H2公差带级别为例)
min
max
min
max
M3
0.5
2.672
2.387
2.459
0.307
0.271
2.675
2.775
2.699
2.714
M3.5
0.6
3.110
2.764
2.850
0.368
0.325
3.110
3.222
3.137
3.155
M4
0.7
3.545
3.141
3.242
0.429
0.379
3.545
3.663
3.574
3.593
M5
0.8
4.480
4.019
4.134
0.491
0.433
4.480
4.605
4.510
5.530
M6
1.0
5.350
4.773
4.937
0.613
0.541
5.350
5.500
5.385
5.408
M7
1.0
6.350
5.773
5.937
0.613
0.541
6.350
6.500
6.385
6.408
M8
1.25
7.188
6.466
6.647
0.767
0.677
7.188
7.348
7.226
7.251
M10
1.5
9.026
8.160
8.376
0.920
0.812
9.026
9.206
9.068
9.096
M12
1.75
10.863
9.853
10.106
1.074
0.947
10.863
11.063
10.911
10.943
M14
2.0
12.701
11.546
11.835
1.227
1.083
12.701
12.913
12.752
12.786
M16
2.0
14.701
13.546
13.835
1.227
1.083
14.701
14.913
14.752
14.786
M18
2.5
16.373
14.933
15.294
1.534
1.353
16.376
16.600
16.430
16.466
M20
2.5
18.376
16.933
17.294
1.534
1.353
18.376
18.600
18.430
18.466
M22
2.5
20.376
18.933
19.294
1.534
1.353
20.376
20.600
20.430
20.466
代号(大径)
d=D
螺距
P
螺纹中径
d2=D2
外螺纹小径
d1
内螺纹小径
D1
外螺纹
全齿高
H2
配合齿高
H1
螺纹中径尺寸
(6H公差带级别)
丝锥螺纹中径
(H2公差带级别为例)
min
max
min
max
M3
0.35
2.773
2.571
2.621
0.215
0.189
2.773
2.863
2.794
2.809
M3.5
0.35
2.273
3.071
3.121
0.215
0.189
3.273
3.363
3.294
3.309
M4
0.5
3.675
3.387
3.459
0.307
0.271
3.675
3.775
3.699
3.714
M5
0.5
4.675
4.387
4.459
0.307
0.271
4.675
4.775
4.699
4.714
M6
0.75
5.513
5.080
5.188
0.460
0.406
5.513
5.645
5.545
5.566
M8
1.0
7.350
6.773
6.917
0.613
0.541
7.350
7.500
7.385
7.408
M10
1.0
9.350
8.773
8.917
0.613
0.541
9.350
9.500
9.385
9.408
M10
1.25
9.188
8.466
8.647
0.767
0.677
9.188
9.348
9.226
9.251
M12
1.25
11.188
10.466
10.647
0.767
0.677
11.188
11.368
11.226
11.251
M12
1.5
11.026
10.160
10.376
0.920
0.812
11.026
11.216
11.068
11.096
M14
1.5
13.026
12.160
12.376
0.920
0.812
13.026
13.216
13.068
13.096
M16
1.5
15.026
14.160
14.376
0.920
0.812
15.026
15.216
15.068
15.096
M18
1.5
17.026
16.160
16.376
0.920
0.812
17.026
17.216
17.068
17.096
M18
2.0
16.701
15.546
15.835
1.227
1.083
16.701
16.913
16.752
16.786
M20
1.5
19.026
18.160
18.376
0.920
0.812
19.026
19.216
19.068
19.096
M20
2.0
18.701
17.546
17.835
1.227
1.083
18.701
18.913
18.752
18.786
M22
1.5
21.026
20.160
20.376
0.920
0.812
21.026
21.216
21.068
21.096
M22
2.0
20.701
19.546
19.835
1.227
1.083
20.701
20.913
20.752
20.786
H二琴卩=0.866C25P
UNC统一粗牙螺纹基本牙型与尺寸和公差带
代号
(螺纹直径一
25.4m内牙数)
螺距
P
螺纹大径
d=D
螺纹中径
d2=D2
内螺纹小径
D1
外螺纹小径
d1
螺纹中径尺寸
丝锥螺纹中径
2B3B
min
2Bmax
3Bmax
min
max
NO.5—40
0.635
3.175
2.746
2.487
2.395
2.764
2.847
2.827
2.776
2.789
NO.6—32
0.794
3.505
2.990
2.647
2.532
2.990
3.084
3.058
3.105
3.028
NO.8—32
0.794
4.166
3.650
3.307
3.193
3.650
3.746
3.721
3.675
3.688
NO.10—24
1.058
4.826
4.138
3.680
3.528
4.138
4.247
4.219
4.963
4.176
NO.12—24
1.058
5.486
4.798
4.341
4.188
4.798
4.910
4.882
4.823
4.836
UNC1/4"-20
1.270
6.350
5.524
4.976
4.793
5.524
5.646
5.616
5.575
5.588
UNC5/16"-18
1.411
7.938
7.021
6.411
6.205
7.021
7.155
7.120
7.071
7.084
UNC3/8"-16
1.588
9.525
8.494
7.805
7.577
8.494
8.639
8.603
8.545
8.557
UNC7/16"-14
1.814
11.112
9.934
9.149
8.887
9.934
10.089
10.051
9.985
9.997
UNC1/2"-13
1.954
12.700
11.430
10.584
10.302
11.430
11.595
11.552
11.481
11.494
UNC9/16"-12
2.117
14.288
12.913
11.996
11.692
12.913
13.086
13.043
12.964
12.977
UNC5/8"-11
2.309
15.875
14.376
13.376
13.043
14.376
14.559
14.514
14.427
14.440
UNC3/4"-10
2.540
19.050
17.399
16.229
15.933
17.399
17.595
17.544
17.450
17.463
UNC7/8"-9
2.822
22.225
20.390
19.169
18.763
20.391
20.599
20.546
20.455
20.467
UNC1"-8
3.175
25.400
23.338
21.963
21.504
23.338
23.561
23.505
23.401
23.414
代号
(螺纹直径一
25.4m内牙数)
螺距
P
螺纹大径
d=D
螺纹中径
d2=D2
内螺纹小径
D1
外螺纹小径
d1
螺纹中径尺寸
丝锥螺纹中径(2
级)
2B3B
min
2Bmax
3Bmax
min
max
NO.5—44
0.577
3.175
2.799
2.550
2.466
2.799
2.880
2.860
2.812
2.824
NO.6—40
0.635
3.505
3.094
2.817
2.725
3.094
3.180
3.157
3.108
3.119
NO.8—36
0.706
4.166
3.708
3.401
3.299
3.708
3.800
3.777
3.721
3.734
NO.10—32
0.794
4.826
4.310
3.976
3.853
4.310
4.409
4.384
4.336
4.348
NO.12—28
0.907
5.486
4.897
4.503
4.37
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