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Power Transmission Belt Size List
V-Belt Sizes Timing Belt Sizes



Classical Wrapped Belts Part Number Top Width (in.) Thickness (in.) Inside Circumference (in.) Outside Circumference (in.)
Wrapped A V-Belt A .5 .32 14 16
Wrapped B V-Belt B .64 .44 20 23
Wrapped C V-Belt C .87 .57 46 50
Wrapped D V-Belt D 1.25 .89 90 95



Wrapped Wedge Belts Part Number Top Width (in.) Thickness (in.) Outside Circumference (in.)
Wrapped 3V V-Belt 3V .38 .33 21.0
Wrapped 5V V-Belt 5V .62 .53 50.0
Wrapped 8V V-Belt 8V 1.00 .96 100.0



Fractional Horsepower (FHP) Belts Part Number Top Width (in.) Thickness (in.) Outside Circumference (in.)
Wrapped 3L V-Belt 3L .38 .23 13.0
Wrapped 4L V-Belt 4L .50 .32 16.0
Wrapped 5L V-Belt 5L .64 .44 23.0



Classical Cogged Belts Part Number Top Width (in.) Thickness (in.) Inside Circumference (in.) Outside Circumference (in.)
Raw Edge AX V-Belt AX .51 .34 15 17
Raw Edge BX V-Belt BX .66 .43 22 25
Raw Edge CX V-Belt CX .87 .56 51 55



Cogged Wedge Belts Part Number Top Width (in.) Thickness (in.) Outside Circumference (in.)
Raw Edge 3VX V-Belt 3VX .38 .32 21.0
Raw Edge 5VX V-Belt 5VX .62 .53 40.0
Raw Edge 8VX V-Belt 8VX 1.00 .96 100.0



Banded Wrapped Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Inside Circumference (in.) Outside Circumference (in.)
Banded B V-Belt /B .64 1.41 .55 2 47 50
Banded C V-Belt /C .87 1.88 .74 2 72 76
Banded D V-Belt /D 1.25 2.688 .98 2 144 149



Banded Wedge Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Outside Circumference (in.)
Banded 3V V-Belt /3V .38 .781 .41 2 50.0
Banded 5V V-Belt /5V .62 1.313 .61 2 67.0
Banded 8V V-Belt /8V 1.00 2.125 1.06 2 100.0



Banded Cogged Wedge Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Outside Circumference (in.)
Banded 3VX V-Belt /3VX .38 .781 .41 2 30.0
Banded 5VX V-Belt /5VX .62 1.313 .61 2 50.0



Banded Kevlar Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Outside Circumference (in.)
Banded 3VK Kevlar V-Belt /3VK .38 .781 .41 2 53.0
Banded 5VK Kevlar V-Belt /5VK .62 1.313 .60 2 75.0
Banded 8VK Kevlar V-Belt /8VK 1.00 2.125 1.06 2 125.0



Double Sided (Hex) V-Belts Part Number Top Width (in.) Thickness (in.) Outside Circumference (in.)
Wrapped AAHEX V-Belt AA .50 .42 54.3
Wrapped BBHEX V-Belt BB .66 .55 50.7
Wrapped CCHEX V-Belt CC .88 .68 81.2



Metric V-Belts Part Number Top Width (mm) Thickness (mm) Outside Circumference (mm)
Wrapped SPZ V-Belt SPZ 10 8 575
Wrapped SPA V-Belt SPA 13 10 1375
Wrapped SPB V-Belt SPB 16 13 1272
Wrapped SPC V-Belt SPC 22 18 1930



Cogged Metric V-Belts Part Number Top Width (mm) Thickness (mm) Outside Circumference (mm)
Raw Edge SPZX V-Belt SPZX 10 8 625
Raw Edge SPAX V-Belt SPAX 13 10 648
Raw Edge SPBX V-Belt SPBX 16 13 1272
Raw Edge SPCX V-Belt SPCX 22 18 1830



V-Ribbed Belts Part Number Ribs Total Width (in.) Outside Circumference (in.)
PJ V-Ribbed Belt J 6 .558 13.0
K V-Ribbed Belt 3 0.42 30.0



Lawn and Garden Belts Part Number Top Width (in.) Thickness (in.) Inside Circumference (in.) Outside Circumference (in.)
Lawn and Garden A V-Belt A .5 .35 20 22
Lawn and Garden B V-Belt B .64 .40 30 33
Lawn and Garden 3L V-Belt 3L .87 .24 240 244



Included Belt Angle for all above belts is approximately 40 degrees.

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Product Application Advisory! Do not use Bestorq products on aircraft propeller or rotor drive systems or in-flight accessory drives or man lift elevators or man lifts. Bestorq products are not designed or intended for such use.
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