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V-Ribbed Belt

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J Series Poly-V Belts
J Series Poly-V Belts
K Series Poly-V Belts
K Series Poly-V Belts
EPJ Series Poly-V Belts
EPJ Series Poly-V Belts

V-Ribbed J, K, and EPJ Poly V Belts are high-efficiency, compact power transmission solutions widely used in industrial, commercial, and automotive applications. Also known as Micro-V or serpentine belts, these belts combine the flexibility of flat belts with the traction and grip of V-belts. The multiple longitudinal ribs of V-ribbed belts provide excellent surface contact and load distribution, making them ideal for high-speed, high-ratio drives in compact systems.

Specifications of J, K, and EPJ Poly V Belts

J Section Poly V Belts:

  • Pitch (rib spacing): 2.34 mm

  • Belt Height: ~3.5 mm

  • Top Width: Based on the number of ribs (e.g., 10 ribs = 23.4 mm)

  • Recommended Pulley Diameter: Minimum ~18 mm

  • Construction: Synthetic rubber with high-strength polyester or aramid tension cords

  • Temperature Range: -30°C to +80°C

  • Standard Length Designations: 2 digits (e.g., PJ600 = 600 mm effective length)

K Section Poly V Belts:

  • Pitch (rib spacing): 3.56 mm

  • Belt Height: ~4.5 mm

  • Top Width: Variable by rib count

  • Minimum Pulley Diameter: ~50 mm

  • Use: Heavier-duty applications, common in automotive and industrial settings

  • Material: Neoprene or EPDM for longer life and heat resistance

EPJ Belts:

  • EPJ belts are metric equivalents of J section belts, where the "E" denotes European metric sizing.

  • Example: EPJ1230 = 1230 mm effective length

  • Rib Pitch: 2.34 mm, same as J

  • Ideal for European or OEM-spec pulleys

All belts are manufactured to tight tolerances for precision fit and performance. They are designed to be oil-resistant, anti-static, and resistant to wear, cracking, and environmental degradation.

Applications of J, K & EPJ Poly V Belts

V-ribbed belts are highly versatile and suited to compact, high-speed, and multi-accessory drive systems. Common applications include:

Industrial Applications:

  • HVAC blower motors and compressors

  • Washing machines and dryers

  • Power tools and woodworking machinery

  • Office equipment like copiers and printers

  • Treadmills, fitness machines, and massage chairs

  • Light conveyors and packaging machines

Automotive Applications:

  • Engine accessory drives (alternator, A/C compressor, power steering pump, water pump)

  • Serpentine belt systems for multiple accessory operation

  • Compact hybrid drive systems

Commercial Applications:

  • Vending machines

  • Commercial refrigeration systems

  • Fans, pumps, and belt-driven generators

Why Choose V-Ribbed J, K, and EPJ Belts?

These belts offer numerous performance advantages:

  • Compact Design: Ideal for limited-space environments

  • Quiet Operation: Minimal vibration and noise

  • Excellent Flexibility: Ideal for small pulley diameters

  • High Speed Ratio Capabilities: Efficient power transfer at high RPMs

  • Improved Load Distribution: Multiple ribs share the load, reducing wear

  • Energy Efficiency: Reduced slip means less energy loss

V-Ribbed belts like J, K, and EPJ series are engineered for superior performance and reliability in high-precision, multi-accessory drive systems. Their low-profile design enables manufacturers and engineers to reduce system footprint without compromising on torque transmission or belt longevity.

For maintenance-critical environments or designs where compact efficiency is key, V-ribbed Poly V belts deliver the optimal blend of performance, durability, and versatility. Whether you need a metric EPJ for European OEM machines or a robust K-section for automotive and industrial use, these belts ensure long-lasting, high-efficiency performance.

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