Dayco 5080630 Poly Cog Heavy Duty 8-Rib Serpentine Belt

The Dayco 5080630 Poly Cog Belt is a premium heavy-duty serpentine belt engineered for demanding diesel engine accessory drive systems. This 8-rib belt measures 1.12 inches wide with a 63-inch pitch length, providing reliable power transmission for multiple-accessory drives in commercial trucks, buses, and heavy equipment.

Key Features:

• Transverse groove design runs cooler (up to 50°F) and dramatically reduces rib cracking, extending belt life by at least 40%
• Features more polyester cords per inch than conventional belts to meet higher torque demands of modern diesel engines
• EPDM rubber with aramid fiber reinforcement, operating temperature range from -42.7°C to 100°C
• Grooved design provides flexural stress relief for increased flexibility in normal and backside bending
• Computer-designed cog placement eliminates harmonic squeal while maintaining heavy-duty construction
• Meets or exceeds SAE J1459 and J1596 specifications

Specifications:

• Number of Ribs: 8
• Belt Width: 1.12 inches (28.4mm)
• Effective Length: 63 inches
• Outside Circumference: 63.63 inches
• Cross Section: K-Section
• Material: EPDM, Aramid Reinforced

Specially treated cords resist stretching and ensure length stability essential for correct tensioning between drive system components. Compatible with Volvo, Mack, Cummins, and Navistar applications, with multiple OEM part number cross-references including VOLVO 20545619, MACK 21556637, CUMMINS 3288988, and NAPA 25-080630.