Technical Section
Metric Keyway and Key Details for Universal Joints
d
b (Tol. P9/JS9)
Hub
Keyway
b (Tol. P9/N9)
Shaft
Keyway
h
t1
t2
t3
t4
7
8
2
2
2
2
2
2
8
9
1 +0.1
1
5.8
6.8
1.2 +0.1
1.2

9
10

3
3

3
3

3
3

10.4
11.4

1.4
1.4

7.2
8.2

1.8
1.8

11
12
4
4
4
4
4
4
12.8
13.8
1.8
1.8
8.5
9.5
2.5
2.5
13
14
15
16
17
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
15.3
16.3
17.3
18.3
19.3
2.3
2.3
2.3
2.3
2.3
10
11
12
13
14
3
3
3
3
3
18
20
22
6
6
6
6
6
6
6
6
6
20.8
22.8
24.8
2.8 
2.8
2.8
14.5
16.5
18.5
3.5
3.5
3.5
24
25
26
28
30
8
8
8
8
8
8
8
8
8
8
7
7
7
7
7
27.3
28.3
29.3
31.3
33.3
3.3 +0.2
3.3
3.3
3.3
3.3
20
21
22
24
26
4 +0.2
4
4
4
4
32
34
35
36
38
10
10
10
10
10
10
10
10
10
10
8
8
8
8
8
35.3
37.3
38.3
39.3
41.3
3.3
3.3
3.3
3.3
3.3
27
29
30
31
33
5
5
5
5
5
40
42
44
12
12
12
12
12
12
8
8
8
43.3
45.3
47.3
3.3
3.3
3.3
35
37
39
5
5
5
The above chart is to be used for universal joint attachments DIN 808 and GN 908.
      To British Standard Pipe Threads