Belt Width

Fastener Size

1

1-1/4

1-1/2

2

2-1/2

3

inch

mm

inch

mm

inch

mm

inch

mm

inch

mm

inch

mm

Belt Thickness

1/4
5/16

5-8

1/4
3/8

7-10

3/8
11/16

8-12

5/16
7/16

8-15

7/16
13/16

12-20

5/8
1-1/4

15-30

inch

mm

Min Dia. of Pulley

10

250

14

350

18

450

30

750

40

1050

47

≥ 1200

12
16
18

300
400
450

...

10
13
15

8
10
12

8
10
12

...
9
10

...
...
9

...
...
...

20
24
26

500
600
650

...

16
20
22

13
16
17

13
16
17

11
14
15

10
13
14

10
13
14

28
30
36

700
750
900

...

23
25
30

18
20
24

18
20
24

16
17
21

15
16
19

15
16
19

42
48
60
72

1050
1200
1500
1800

...

35
40
50
60

28
32
40
48

28
32
40
48

24
28
35
42

22
26
32
39

21
24
30
36