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Heavy Duty Belts

Heavy-Duty Performance Starts Here

Ensure Peak Engine Efficiency with Mitsuboshi Belts

Power transmission belts are essential for the reliable operation of large gasoline and diesel engines in heavy-duty commercial vehicles like semis, buses, and fleet trucks. Mitsuboshi belts are precision-engineered to handle high torque, extreme heat, and constant mechanical stress, ensuring consistent power delivery from the engine to key components. Our range—including V-belts, timing belts, and V-ribbed serpentine belts—is built for longevity, offering exceptional durability, performance, and reliability in even the most demanding routes and road conditions. Whether you manage a fleet or service heavy vehicles, Mitsuboshi belts deliver the OEM-grade quality and strength professionals trust.

Commercial Bus Engine Belts

ThermometerHeat & Weather Resilience

Built to endure high engine temperatures and harsh climates, our belts perform reliably in long-haul and fleet environments.

Long Life IconLong-Lasting Performance

Designed for durability and extended life, our belts help reduce maintenance frequency and fleet downtime.

Heavy Load-1

Extreme Load Resistance

Mitsuboshi belts are engineered to handle intense torque and mechanical stress, ensuring consistent performance under heavy loads.

Trust IconTrusted OEM Quality

Mitsuboshi manufactures belts specified by leading OEMs—delivering the same high-quality performance to fleets, distributors, and service professionals.

Heavy Duty Belt Applications

 

 

Cooling Fan Drives

Raw-edge cogged or banded V-belts drive engine cooling fans, delivering reliable performance under high temperatures, tension, and fluctuating engine speeds.

 

 

 

Air Compressor Systems

Service trucks often run belt-driven air compressors using v-belts or cogged v-belts. These systems provide portable air power for tools and tire inflation. V-belts are chosen for their durability, easy replacement, and ability to dampen sudden load changes.

 

 

 

Bus Rooftop Air Conditioning

Rooftop A/C units on buses often rely on multi-rib serpentine or v-belts to drive the compressor from the engine. These belts offer flexibility and consistent power transfer in a compact system, keeping passenger cabins cool without overloading the main drive system.

 

 

 

 

Reefer Trailer Compressors

Refrigerated trailers use cogged v-belts or ribbed belts to drive compressors from small diesel engines. These belts provide efficient torque transfer with minimal slip, ensuring consistent cooling for perishable cargo during long hauls and stops.

 

 

 

Truck-Mounted Hydraulic Systems

Dump trucks and tow vehicles use v-belts or serpentine belts to power hydraulic pumps mounted near the engine. These belts handle high torque loads and absorb vibration, making them ideal for operating liftgates, plows, or dump beds without relying on transmission PTOs.

 

 

 

Mobile Concrete Mixers

Truck-mounted mixers commonly use high-torque v-belts or banded v-belts to rotate the mixing drum. Some also use timing belts for conveyors. These belts provide consistent, reliable rotation to ensure thorough concrete mixing during transport and delivery.

 

Featured Products for Heavy Duty Belt Applications

Mitsuboshi Raw-edge Cogged V-belt
 

Raw-edge Cogged V-belt

  • Proven cost-effective design that is the preferred option on many applications.
  • Optimum flexibility provides greater heat dissipation which insures longer operational efficiency.
  • Variable spacing of cogs provides improved belt performance by reducing noise and tension decay.
Learn More About Raw-edge Cogged V-belts
Mitsuboshi Raw-edge Cogged Banded Belt
 

Raw-edge Cogged Banded

  • Popular on trucks, agricultural units, heavy equipment, and other applications where large gasoline and diesel engines are used.
  • Cogged design provides an area for air circulation further reducing heat build-up and providing greater flexibility.
  • Laminated construction of the bottom fabric reduces noise in the drive that is inherently loud.
Learn More About Raw-edge Cogged Banded Belts
Mitsuboshi V-ribbed Belt

V-ribbed

  • Combine the benefits of flat belt flexibility with the power transmission capability of the V-belt.
  • Proven reliability on drives with or without automatic tensioners.
  • Rubber compounds are formulated to reduce noise caused by humid conditions and worn pulleys.
Learn More About V-ribbed Belts
Mitsuboshi Double-sided V-ribbed Belt
 

Double-sided V-ribbed

  • Provides the ultimate in belt design for use on today's modern engines where space and weight are critical
  • Accessories can be driven from the top or bottom side of the belt enabling compact designs.
  • Top or backside ribs are capable of handling high load accessories.
Learn More About Double-sided V-ribbed Belts
Ready to Power Performance?

Contact us today to spec the belts trusted by OEMs and built for the rigors of heavy-duty trucks, buses, and commercial vehicles.

Let's keep your fleet moving!