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Will drop ship from manufacturer in 1 business day with Next Day Air or 2nd Day Air Shipping Selection
Will drop ship from manufacturer in 1-2 business days if order total is over $500.00.
- Buy 10 for $91.13 each and save 5%
- Buy 25 for $88.74 each and save 7%
- Buy 50 for $86.34 each and save 10%
SKU | 9003-2310 |
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Weight | 3.700000 |
Length (inch) | 311 |
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.
310– 310 inches is the inside circumference of the belt. For B-section v-belts, the outside circumference is found by adding 1 inches to the inside length of the belt. So, the outside circumference of the B310 belt is 311 inches (310+1).
Dimensions:
Length (inch) | 311 |
---|---|
Length (mm) | 7899 |
Length Type | Outside Circumference |
Top Belt Width per strand (inch) | 0.66 |
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Top Belt Width per strand (mm) | 17 |
Nominal Thickness (inch) | 0.41 |
Nominal Thickness (mm) | 10 |
Design:
- Flex-Weave Cover – The Gates B310 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 B310 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 B310 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: B300 (301 inch length)
Next Size Longer: B315 (316 inch length)
Next Size Narrower: none (Note: Belt will sit lower in the pulley, so a shorter belt might be needed)
Next Size Wider: none (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 |
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Gates B310 | $95.93 | 8.85 | Not Suitable | Good | Not Ideal | Good |
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(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 B310 fan belt
- Balflex Classic B310
- Bando Power King B310
- Bestorq Wrapped B310
- Browning Super Gripbelt B310
- Carlisle Super II B310
- Continental B310 V-Belt
- ContiTech (Conti) B310
- Dayco Gold Label AP55
- Dayton B310 fan belt
- Dodge AP55
- Dunlop B310
- Fenner Classic B310
- Goodrich B310 vbelt
- Goodyear Hy-T Plus B310
- Grainger
- Hutchinson Conventional Wrapped B310
- Jason Industrial Unimatch Multi-Plus B310
- Maska Classical VBB310
- Mitsuboshi Red Label B310
- Optibelt VB B310
- Pirelli B310 veebelt
- Pix B310 vbelt
- TB Woods Conventional B310
- Thermoid Prime Mover B310
- Thermoid Select B310