V-Ribbed J, K, and EPJ Poly V Belts
High-Efficiency Power Transmission for Compact Industrial & Automotive Systems
V-Ribbed Poly V belts—also known as Micro-V or serpentine belts—are engineered to deliver exceptional efficiency, flexibility, and durability in compact, high-speed power transmission systems. By combining the smooth-running characteristics of flat belts with the traction of traditional V-belts, these belts provide maximum surface contact and superior load distribution. Their multi-ribbed design ensures reliable power transfer, minimal slippage, and quiet operation, making them ideal for industrial, commercial, and automotive applications.
Specifications of J, K & EPJ Poly V Belts
Precision Dimensions for High-Speed, High-Ratio Drives
J Section Poly V Belts:
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Rib Pitch: 2.34 mm
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Height: ~3.5 mm
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Top Width: Rib count × 2.34 mm (e.g., PJ10 = 23.4 mm)
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Min. Pulley Diameter: ~18 mm
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Materials: Synthetic rubber + polyester/aramid cords
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Temp Range: -30°C to +80°C
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Example Designation: PJ600 = 600 mm effective length
K Section Poly V Belts:
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Rib Pitch: 3.56 mm
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Height: ~4.5 mm
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Min. Pulley Diameter: ~50 mm
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Materials: Neoprene or EPDM for increased heat resistance
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Common Use: Automotive serpentine and heavy industrial drives
EPJ Poly V Belts:
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Metric J-profile equivalent
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Same 2.34 mm rib pitch
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Example: EPJ1230 = 1230 mm effective length
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Ideal for European OEM systems requiring precise metric sizing
All Poly V belts are designed to be oil-resistant, anti-static, crack-resistant, and capable of withstanding continuous high-speed operation.
Applications
Industrial • Automotive • Commercial
Industrial:
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HVAC blowers and compressors
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Washers, dryers, and fitness machines
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Woodworking tools and power equipment
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Copiers, printers, and office machinery
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Packaging machines and light conveyors
Automotive:
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Serpentine belt systems
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Alternators, A/C compressors, power steering, water pumps
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Hybrid accessory drive systems
Commercial:
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Vending equipment
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Refrigeration units
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Pumps, generators, and fan systems
Why Choose J, K & EPJ V-Ribbed Belts?
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Compact design for tight installation spaces
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High flexibility for small pulley diameters
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Quiet, vibration-free operation
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Superior load distribution across multiple ribs
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High efficiency with reduced energy loss
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Long service life thanks to reinforced construction
V-Ribbed Poly V belts—J, K, and EPJ series—offer unmatched performance in high-speed, multi-accessory drive environments. Whether you're maintaining an automotive serpentine system, outfitting industrial equipment, or sourcing metric EPJ belts for European OEM machinery, these belts deliver the durability, precision, and efficiency required for modern power transmission.
Contact us today for cross-references, OEM replacements, or expert guidance in selecting the ideal Poly V belt for your application.