Adjustable Center Drives
Series 21 Standard V-Belt Drives: Belt Selector
 
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Series 21 - Belt Center Distance Tables

Pulley Combination to be Used
Belt
Size
3C
3M
3C
4M
3C
5M
3C
6M
4C
4M
4C
5M
4C
6M
4C
7M
4C
8M
5C
5M
5C
6M
5C
7M
5C
8M
6C
6M
6C
7M
6C
8M
4C
3M
5C
3M
6C
3M
5C
4M
6C
4M
7C
4M
8C
4M
6C
6M
7C
5M
8C
5M
7C
6M
8C
6M
A-26
10.0
9.4
8.6
7.9
9.2
8.5
7.5
8.2
7.5
7.2
A-31
12.5
11.9
11.1
10.4
11.6
10.7
9.9
9.2
8.1
10.7
9.9
9.3
8.1
9.6
9.0
7.8
A-33
13.5
12.9
12.1
11.4
12.6
11.7
10.9
10.2
9.2
11.7
10.9
10.4
9.1
10.7
10.0
8.9
A-35
14.5
13.9
13.1
12.4
13.6
12.7
11.9
11.2
10.2
12.7
11.9
11.4
10.1
11.7
11.0
9.9
A-38
16.0
15.4
14.6
13.9
14.6
14.2
13.2
12.7
11.6
14.2
13.4
12.9
11.6
13.2
12.5
11.4
A-42
18.0
17.4
16.6
15.9
16.9
16.2
15.2
14.7
13.6
16.2
15.4
14.7
13.6
15.2
14.5
13.4
A-46
20.0
19.4
18.6
17.9
18.9
18.2
17.2
16.7
15.6
18.2
17.4
16.7
15.6
17.2
16.5
15.4
A-48
21.0
20.4
19.6
18.9
19.9
19.2
18.2
17.7
16.7
19.2
18.4
17.7
16.6
18.2
17.5
16.4
A-51
21.9
21.1
20.4
21.4
20.7
19.7
19.2
18.2
20.7
19.9
19.2
18.1
19.7
19.0
17.9
A-53
22.9
22.1
21.4
22.4
21.7
20.7
20.2
19.2
21.7
20.9
20.2
19.1
20.7
20.0
18.9
A-55
23.9
23.1
22.4
23.4
22.7
21.7
21.2
20.2
22.7
21.9
21.2
20.1
21.7
21.0
19.9
A-60
26.4
25.6
24.9
25.9
25.2
24.4
23.7
22.7
25.2
24.4
23.7
22.6
24.2
23.5
22.4
A-62
25.4
24.7
23.6
25.2
24.5
23.4

Pulley Combination to be Used
Belt
Size
5C
8M
6C
6M
6C
7M
6C
8M
7C
7M
7C
8M
8C
8M
8C
5M
7C
6M
8C
6M
8C
7M
B-35
10.3
12.1
11.1
10.2
11.2
10.0
9.7
B-38
11.8
13.6
12.6
11.7
12.7
11.5
11.2
B-42
13.8
15.6
14.7
13.7
14.7
13.6
13.2
B-46
15.9
17.6
16.7
15.4
16.7
15.6
15.4
B-48
16.9
18.6
17.7
16.7
17.7
16.6
16.4
B-51
18.4
20.1
19.2
17.8
19.2
18.1
17.9
B-53
19.4
21.1
20.2
19.3
20.3
19.1
18.9
B-55
20.4
22.1
21.2
20.3
21.3
20.1
19.9
B-60
22.9
24.6
23.7
22.8
23.8
22.6
22.4
B-62
23.9
25.6
24.7
23.8
24.8
23.6
23.4
B-64
24.8
25.8
24.6
24.4
B-65
25.3
26.3
25.4
24.9
B-66
25.8
26.8
25.9
25.4
B-68
26.8
27.8
26.9
26.4

Pulley Combination to be Used
Belt
Size
8C
8M
C-51
18.1
C-60
22.3
C-68
26.3
C-75
29.8
C-81
32.8
C-85
34.8
C-90
37.3
C-96
40.3