

Stocking Status: Typically in Stock - Ships in 1 business day.
- Buy 10 for $29.41 each and save 5%
- Buy 25 for $28.64 each and save 7%
- Buy 50 for $27.86 each and save 10%
SKU | 9003-2120 |
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Weight | 1.300000 |
Length (inch) | 123 |
Length Type | Outside Circumference |
Top Belt Width per strand (inch) | 0.66 |
Nominal Thickness (inch) | 0.41 |
B – The B stands for a “B” section v-belt. This is considered a “Classic” v-belt style that has a top width of 21/32 (0.656) inches, but is commonly referred to as a 5/8 (0.625) inch belt. The thickness of the belt is 13/32 (0.406) inches.
120– 120 inches is the inside circumference of the belt. For B-section v-belts, the outside circumference is found by adding 3 inches to the inside length of the belt. So, the outside circumference of the B120 belt is 123 inches (120+3).
Dimensions:
Length (inch) | 123 |
---|---|
Length (mm) | 3124 |
Length Type | Outside Circumference |
Top Belt Width per strand (inch) | 0.66 |
---|---|
Top Belt Width per strand (mm) | 17 |
Nominal Thickness (inch) | 0.41 |
Nominal Thickness (mm) | 10 |
Design:
- Flex-Weave Cover – The Gates B120 v-belt is a wrapped belt that features a patented single layer fabric construction for longer cover life. The cover protects the belt core from oil dirt and heat. The wrapped cover also makes the belt suitable for clutching applications.
- Flex-Bonded Cords – The Hi-Power II belt line utilizes a proprietary core material blend that strongly bonds the polyester cords to the body of the belt, resulting in uniform load distribution and absorption of bending stress without cord deterioration.
- Gates Curves – The belt cross-section has been optimized to provide proper cord support and full contact with the pulley to provide uniform loading, uniform wear, and increased belt life.

Recommended Applications:
Matching / Multi-Belt Drives:
Part of the V80 Matching System - Gates Hi-Power II B120 v-belts can be used individually in a single vbelt drive or can be used in sets of 2 or more belts for higher horsepower applications. All belts in a multiple belt drive must be within a certain length tolerance in order for the belts to work together to provide the full design horsepower. In the past, manufacturing tolerances were wider and each belt was assigned a match number that indicated its exact length within the manufacturing tolerance. Gates invested heavily to reduce manufacturing tolerances. The result was the V80 matching system that ensures that every B120 belt can be used in a matched set, regardless of batch or lot. An alternative to using a set of individual belts is to use a joined or banded belt such as the Gates B-Section Hi-Power II PowerBand belt.
Requirements Met:
RMA oil and heat resistant standards.
RMA static conductivity requirements.
Similar Sizes:
Next Size Shorter: B119 (122 inch length)
Next Size Longer: B122 (125 inch length)
Next Size Narrower: none (Note: Belt will sit lower in the pulley, so a shorter belt might be needed)
Next Size Wider: C119 (Note: Belt will sit higher in the pulley, so a longer belt might be needed)
Same Size – Different Product Line:
Part Number | Price | Horsepower Rating (1) on a 6” Pulley | Horsepower Rating (1) on a 4” Pulley | Shock Load | Backside Idler | Clutching |
---|---|---|---|---|---|---|
Gates B120 | $30.96 | 8.85 | Not Suitable | Good | Not Ideal | Good |
Gates | ||||||
Gates | ||||||
Gates BX120 | $40.70 | 10 | 6.04 | Good | Not Ideal | Not Suitable |
Gates BP120 | $55.74 | 16.3 | Not Suitable | Excellent | Not Ideal | Good |
(1) Horsepower rating calculated using Gates Design Flex software for a single belt at 1750 rpm and a 1:1 speed ratio on a 6” pulley
(2) Horsepower rating calculated using Gates Design Flex software for a single belt at 1750 rpm and a 1:1 speed ratio on a 4” pulley
Light Duty Sheave or Pulley – Bored to Size (Fixed diameter for single or dual belt drives)
Light Duty Sheave or Pulley – Variable Pitch – Bored to Size (Adjustable pitch diameter for single or dual belt drives)
Light Duty Sheave or Pulley – QT Bushed – (Fixed diameter for single or dual belt drives)
Recommended Pulleys or Sheaves for Heavy Duty ApplicationsMulti-Duty Sheave or Pulley (Fixed diameter for single or multi belt drives)
SVS Adjustable Speed Sheave or Pulley (Adjustable pitch diameter for multi belt drives)
- AC Delco B120 fan belt
- Balflex Classic B120
- Bando Power King B120
- Bestorq Wrapped B120
- Browning Super Gripbelt B120
- Carlisle Super II B120
- Continental B120 V-Belt
- ContiTech (Conti) B120
- Dayco Gold Label AP55
- Dayton B120 fan belt
- Dodge 107057 AP55
- Dunlop B120
- Fenner Classic B120
- Goodrich B120 vbelt
- Goodyear Hy-T Plus B120
- Grainger 3X354
- Hutchinson Conventional Wrapped B120
- Jason Industrial Unimatch Multi-Plus B120
- Maska Classical VBB120
- Mitsuboshi Red Label B120
- Optibelt VB B120
- Pirelli B120 veebelt
- Pix B120 vbelt
- TB Woods Conventional B120
- Thermoid Prime Mover B120
- Thermoid Select B120