Overview
The Gates B78 Hi-Power II V-Belt is a wrapped classical B-section industrial power transmission belt engineered for general-purpose machinery, motors, and compressor drives. With Gates Corporation’s reputation for reliability, this belt combines proven performance with composite, multi-purpose construction designed to resist oil, heat, ozone, sunlight, weather, and aging. The 81-inch outside circumference (78-inch inside circumference) B-section design fits standard sheaves and pulley systems without modification.
Key Features
- Flex-Bonded Tensile Cords: Strongly bound to the body of the belt, resulting in equal load distribution and absorption of bending stress without cord deterioration.
- Flex-Weaveâ„¢ Cover: Constructed for longer cover life, providing extended protection to the core of the belt from oil, dirt, and heat.
- Fire-Resistant EPDM Material: Engineered EPDM belt material to combat self-igniting, meaning your belt won’t catch fire from heat build-up, even with severe slippage.
- Machined Belt Edge: Machined for even sheave groove contact, resulting in smoother running and less slip and wear.
- V80â„¢ Matching System: All sizes meet Gates V80â„¢ system matching tolerances for use in single or multi-belt drives.
- Static Conductive: Static conductive (ISO 1813) and can as such be used in the conditions described in the Directive 2014/34/EU- ATEX.
Technical Specifications
- Belt Section: Classical B
- Belt Width (Top): 0.66 inch (21/32″)
- Nominal Thickness: 0.41 inch (7/16″)
- Inside Circumference: 78 inches
- Outside Circumference: 81 inches
- Belt Weight: 0.89 lbs per belt
- Material Composition: Neoprene body compound with polyester cord tensile members
- Temperature Range: -30°C to +60°C (-22°F to +140°F)
- Standards Compliance: Meets ARPM/RMA IP-3-2 oil and heat resistant standards and IP-3-3 static conductivity requirements
- Regulatory Compliance: REACH and RoHS 2 compliant
- Gates Product Number: 9003-2078
Typical Applications
Gates B78 Hi-Power II® belts are suitable for all industrial applications, including v-flat drives. Common uses include:
- Industrial motor and machinery drives
- Compressor and pump systems
- Agricultural equipment power transmission
- Multi-duty sheave systems
- Standard v-belt pulley setups
Compatibility & Replacements
Compatible With
- All B-section classical v-belt sheaves and pulleys
- Gates Multi-Duty® sheaves
- Standard industrial motor frames with B-section grooves
- Single and multi-belt drive configurations
- V80â„¢ matching system assemblies
Replaces / Drop-In Replacement For
- Previous-generation Gates Hi-Power B78 belts
- Standard OEM B78 classical v-belts
- Other B-section 81″ OC belts (verify shaft and sheave compatibility)
Works With
- Gates PowerBandâ„¢ multi-belt systems (can be joined as 2/B78, 3/B78 banded sets)
- Classical v-belt pulley systems with standard B-section grooves
- Industrial drive applications requiring RMA-compliant oil and heat-resistant belts
- Environments requiring static-conductive belts per ISO 1813 and ATEX compliance
