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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.) Approximate Outside Circumference (in.)
Wrapped A V-Belt A .5 .32 15 17
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 .75 90 95



Wrapped Wedge Belts Part Number Top Width (in.) Thickness (in.) Approximate Outside Circumference (in.)
Wrapped 3V V-Belt 3V .38 .33 21.0
Wrapped 5V V-Belt 5V .62 .53 56.0
Wrapped 8V V-Belt 8V 1.00 .96 100.0



Fractional Horsepower (FHP) Belts Part Number Top Width (in.) Thickness (in.) Approximate Outside Circumference (in.)
Wrapped 3L V-Belt 3L .38 .23 14.0
Wrapped 4L V-Belt 4L .50 .32 17.0
Wrapped 5L V-Belt 5L .64 .44 23.0



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



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



Fractional Horsepower Cogged Belts Part Number Top Width (in.) Thickness (in.) Approximate Outside Circumference (in.)
Cogged 3LX V-Belt 3LX .38 .23 25.0



Aramid Belts Part Number Top Width (in.) Thickness (in.) Approximate Outside Circumference (in.)
Aramid AK V-Belt AK .5 .32 46.0
Aramid BK V-Belt BK .64 .44 69.0
Aramid 3LK V-Belt 3L K .38 .23 0.0
Aramid 5VK V-Belt 5VK .62 .53 80.0
Aramid 8VK V-Belt 8VK 1.00 .96 100.0



Banded Wrapped Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Inside Circumference (in.) Approximate Outside Circumference (in.)
Banded A V-Belt /A .5 1.125 .41 2 65 67
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 Classical Cogged Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Inside Circumference (in.) Approximate Outside Circumference (in.)
Banded AX V-Belt /AX .5 1.125 .41 2 30 32
Banded BX V-Belt /BX .66 1.41 .55 2 35 38
Banded CX V-Belt /CX .88 1.88 .62 2 75 79



Banded Wedge Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Approximate 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 Approximate 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 8VX V-Belt /8VX 1.00 2.125 1.06 2 100.0



Banded Aramid Belts Part Number Top Width - Band(in.) Top Width - Total(in.) Thickness (in.) Bands Approximate Outside Circumference (in.)
Banded 3VK Aramid V-Belt /3VK .38 .781 .41 2 53.0
Banded 5VK Aramid V-Belt /5VK .62 1.313 .60 2 71.0
Banded 8VK Aramid V-Belt /8VK 1.00 2.125 1.06 2 118.0



Double Sided (Hex) V-Belts Part Number Top Width (in.) Thickness (in.) Approximate 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) Approximate Outside Circumference (mm)
Wrapped SPZ V-Belt SPZ 10 8 763
Wrapped SPA V-Belt SPA 13 10 1430
Wrapped SPB V-Belt SPB 16 13 1422
Wrapped SPC V-Belt SPC 22 18 1930



Cogged Metric V-Belts Part Number Top Width (mm) Thickness (mm) Approximate Outside Circumference (mm)
Cogged XPZ V-Belt XPZ 10 8 625
Cogged XPA V-Belt XPA 13 10 648
Cogged XPB V-Belt XPB 16 13 1272
Cogged XPC V-Belt XPC 22 18 1830



V-Ribbed Belts Part Number Ribs Total Width (in.) Approximate Outside Circumference (in.)
PJ V-Ribbed Belt J 6 .558 12.5
K V-Ribbed Belt K 6 .84 26.0



Lawn and Garden Belts Part Number Top Width (in.) Thickness (in.) Inside Circumference (in.) Approximate Outside Circumference (in.)
Lawn and Garden 3L V-Belt 3L .38 .24 14 15
Lawn and Garden A V-Belt A .5 .35 18 20
Lawn and Garden B V-Belt B .64 .40 26 29



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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