梯形螺纹的牙型和基本尺寸(GB/T5796-1986) (mm)
|
螺距P
|
ac
|
H4＝h3
|
R1max
|
R2max
|
1.5
|
0.15
|
0.9
|
0.075
|
0.15
|
2
|
0.25
|
1.25
|
0.125
|
0.25
|
3
|
0.25
|
1.75
|
0.125
|
0.25
|
4
|
0.25
|
2.25
|
0.125
|
0.25
|
5
|
0.25
|
2.75
|
0.125
|
0.25
|
6
|
0.5
|
3.5
|
0.25
|
0.5
|
7
|
0.5
|
4
|
0.25
|
0.5
|
8
|
0.5
|
4.5
|
0.25
|
0.5
|
9
|
0.5
|
5
|
0.25
|
0.5
|
10
|
0.5
|
5.5
|
0.25
|
0.5
|
12
|
0.5
|
6.5
|
0.25
|
0.5
|
14
|
1
|
8
|
0.5
|
1
|
16
|
1
|
9
|
0.5
|
1
|
18
|
1
|
10
|
0.5
|
1
|
20
|
1
|
11
|
0.5
|
1
|
22
|
1
|
12
|
0.5
|
1
|
24
|
1
|
13
|
0.5
|
1
|
28
|
1
|
15
|
0.5
|
1
|
32
|
1
|
17
|
0.5
|
1
|
36
|
1
|
19
|
0.5
|
1
|
40
|
1
|
21
|
0.5
|
1
|
44
|
1
|
23
|
0.5
|
1
|
基本尺寸计算公式
|
|
公称直径d
|
螺距P
|
中径
d2＝D2
|
大径
D4
|
小径
|
第一系列
|
第二系列
|
d3
|
D1
|
8
|
|
1.5*
|
7.25
|
8.3
|
6.2
|
6.5
|
|
9
|
1.5
|
8.25
|
9.3
|
7.2
|
7.5
|
2*
|
8.00
|
9.5
|
6.5
|
7.0
|
10
|
|
1.5
|
9.25
|
10.3
|
8.2
|
8.5
|
2*
|
9.00
|
10.5
|
7.5
|
8.0
|
|
11
|
2*
|
10.00
|
11.5
|
8.5
|
9.0
|
3
|
9.50
|
11.5
|
7.5
|
8.0
|
12
|
|
2
|
11.00
|
12.5
|
9.5
|
10.0
|
3*
|
10.50
|
12.5
|
8.5
|
9.0
|
|
14
|
2
|
13
|
14.5
|
11.5
|
12
|
3*
|
12.5
|
14.5
|
10.5
|
11
|
16
|
|
2
|
15
|
16.5
|
13.5
|
14
|
4*
|
14
|
16.5
|
11.5
|
12
|
|
18
|
2
|
17
|
18.5
|
15.5
|
16
|
4*
|
16
|
18.5
|
13.5
|
14
|
20
|
|
2
|
19
|
20.5
|
17.5
|
18
|
4*
|
18
|
20.5
|
15.5
|
16
|
|
22
|
3
|
20.5
|
22.5
|
18.5
|
19
|
5*
|
19.5
|
22.5
|
16.5
|
17
|
8
|
18
|
23
|
13
|
14
|
24
|
|
3
|
22.5
|
24.5
|
20.5
|
21
|
5*
|
21.5
|
24.5
|
18.5
|
19
|
8
|
20
|
25
|
15
|
16
|
|
26
|
3
|
24.5
|
26.5
|
22.5
|
23
|
5*
|
23.5
|
26.5
|
20.5
|
21
|
8
|
22
|
27
|
17
|
18
|
28
|
|
3
|
26.5
|
28.5
|
24.5
|
25
|
5*
|
25.5
|
28.5
|
22.5
|
23
|
8
|
24
|
29
|
19
|
20
|
|
30
|
3
|
28.5
|
30.5
|
26.5
|
27
|
6*
|
27
|
31
|
23
|
24
|
10
|
25
|
31
|
19
|
20
|
32
|
|
3
|
30.5
|
32.5
|
28.5
|
29
|
6*
|
29
|
33
|
25
|
26
|
10
|
27
|
33
|
21
|
22
|
|
34
|
2
|
32.5
|
34.5
|
30.5
|
31
|
6*
|
31
|
35
|
27
|
28
|
10
|
29
|
35
|
23
|
24
|
36
|
|
3
|
34.5
|
36.5
|
32.5
|
33
|
6*
|
33
|
37
|
29
|
30
|
10
|
31
|
37
|
25
|
26
|
|
38
|
3
|
36.5
|
38.5
|
34.5
|
35
|
7*
|
34.5
|
39
|
30
|
31
|
10
|
33
|
39
|
27
|
28
|
40
|
|
3
|
38.5
|
40.5
|
36.5
|
37
|
7*
|
36.5
|
41
|
32
|
33
|
10
|
35
|
41
|
29
|
30
|
|
42
|
3
|
40.5
|
42.5
|
38.5
|
39
|
7*
|
38.5
|
43
|
34
|
35
|
10
|
37
|
43
|
31
|
32
|
44
|
|
3
|
42.5
|
44.5
|
40.5
|
41
|
7*
|
40.5
|
45
|
36
|
37
|
12
|
38
|
45
|
31
|
32
|
|
46
|
3
|
44.5
|
46.5
|
42.5
|
43
|
8*
|
42.0
|
47
|
37
|
38
|
12
|
40.0
|
47
|
33
|
34
|
48
|
|
3
|
46.5
|
48.5
|
44.5
|
45
|
8*
|
44
|
49
|
39
|
40
|
12
|
42
|
49
|
35
|
36
|
|
50
|
3
|
48.5
|
50.5
|
46.5
|
47
|
8*
|
46
|
51
|
41
|
42
|
12
|
44
|
51
|
37
|
38
|
52
|
|
3
|
50.5
|
52.5
|
48.5
|
49
|
8*
|
48
|
53
|
43
|
44
|
12
|
46
|
53
|
39
|
40
|
|
55
|
3
|
53.5
|
55.5
|
51.5
|
52
|
9*
|
50.5
|
56
|
45
|
46
|
14
|
48
|
57
|
39
|
41
|
60
|
|
3
|
58.5
|
60.5
|
56.5
|
57
|
9*
|
55.5
|
61
|
50
|
51
|
14
|
53
|
62
|
44
|
46
|
|
65
|
4
|
63
|
65.5
|
60.5
|
61
|
10*
|
60
|
66
|
54
|
55
|
16
|
57
|
67
|
47
|
49 |
