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"