Drive Belt Size Chart
Belts are measured by the outer circle (see image below).
See the charts below for the belt dimensions.
For a list of which belts fit each machine, see the Machine Belt List.
3L, 4L & 5L Series Belts
Number |
Outer Circle |
Number |
Outer Circle |
Number |
Outer Circle |
3L180 |
18" |
4L250 |
25" |
5L250 |
25" |
3L190 |
19" |
4L260 |
26" |
5L260 |
26" |
3L200 |
20" |
4L270 |
27" |
5L270 |
27" |
3L210 |
21" |
4L280 |
28" |
5L280 |
28" |
3L220 |
22" |
4L290 |
29" |
5L290 |
29" |
3L230 |
23" |
4L300 |
30" |
5L300 |
30" |
3L240 |
24" |
4L310 |
31" |
5L310 |
31" |
3L250 |
25" |
4L320 |
32" |
5L320 |
32" |
3L260 |
26" |
4L330 |
33" |
5L330 |
33" |
3L270 |
27" |
4L340 |
34" |
5L340 |
34" |
3L280 |
28" |
4L350 |
35" |
5L350 |
35" |
3L290 |
29" |
4L360 |
36" |
5L360 |
36" |
3L300 |
30" |
4L370 |
37" |
5L370 |
37" |
3L310 |
31" |
4L380 |
38" |
5L380 |
38" |
3L320 |
32" |
4L390 |
39" |
5L390 |
39" |
3L330 |
33" |
4L400 |
40" |
5L400 |
40" |
3L340 |
34" |
4L410 |
41" |
5L410 |
41" |
3L350 |
35" |
4L420 |
42" |
5L420 |
42" |
3L360 |
36" |
4L430 |
43" |
5L430 |
43" |
3L370 |
37" |
4L440 |
44" |
5L440 |
44" |
3L380 |
38" |
4L450 |
45" |
5L450 |
45" |
3L390 |
39" |
4L460 |
46" |
5L460 |
46" |
3L400 |
40" |
4L470 |
47" |
5L470 |
47" |
A, AX, B & BX Series Belts
The only difference between B and BX belts is the BX is cogged to make it more flexible.
Number |
Outer Circle |
Number |
Outer Circle |
A32 & AX32
|
34"
|
B39 & BX39
|
42"
|
B32 & BX32 |
35" |
B40 & BX40 |
43" |
B33 & BX33 |
36" |
B41 & BX41 |
44" |
B34 & BX34 |
37" |
B42 & BX42 |
45" |
B35 & BX35 |
38" |
B43 & BX43 |
46" |
B36 & BX36 |
39" |
B44 & BX44 |
47" |
B37 & BX37 |
40" |
B45 & BX45 |
48" |
B38 & BX38 |
41" |
B46 & BX46 |
49" |
3VX Series Belts
Number |
Outer Circle |
Number |
Outer Circle |
3VX250
|
25"
|
3VX385
|
38.5"
|
3VX265 |
26.5" |
3VX395 |
39.5" |
3VX300 |
30" |
3VX400 |
40" |
3VX315 |
31.5" |
3VX410 |
41" |
3VX355 |
35.5" |
3VX425 |
42.5" |
3VX375 |
37.5" |
3VX475 |
47.5" |
Poly V Type Belts
Poly V belts are measured by the diameter and the number of ribs.
The number of ribs is the number after the letter J.
For example, a PV390J8 has 8 ribs.
The size dimension is the same for all widths.
Ribs |
Width |
4 |
.368" |
5 |
.460" |
6 |
.552" |
7 |
.644" |
8 |
.736" |
10 |
.920" |
Number |
Outer Circle |
Number |
Outer Circle |
PV240J |
24.5" |
PV360J |
36.5" |
PV250J |
25.5" |
PV370J |
37.5" |
PV260J |
26.5" |
PV380J |
38.5" |
PV270J |
27.5" |
PV390J |
39.5" |
PV280J |
28.5" |
PV400J |
40.5" |
PV290J |
29.5" |
PV410J |
41.5" |
PV300J |
30.5" |
PV420J |
42.5" |
PV310J |
31.5" |
PV430J |
43.5" |
PV320J |
32.5" |
PV440J |
44.5" |
PV330J |
33.5" |
PV450J |
45.5" |
PV340J |
34.5" |
PV460J |
46.5" |
PV350J |
35.5" |
PV470J |
47.5" |