Caliso 356K4S Poly-V Serpentine Belt K-Section - 4-Rib 35.6

The Caliso 356K4S is a K-section Poly-V serpentine belt featuring 4 ribs and a 35.6-inch pitch length. Also known as a micro-rib or multi-ribbed belt, this style of drive belt is a staple in automotive and light industrial power transmission systems.

Key Features:

• Belt Section: K (PK) — 9/64" (3.56 mm) rib pitch, the standard for automotive serpentine applications
• Rib Count: 4 ribs
• Pitch Length: 35.6 inches
• Top Width: 0.56 inches (14.22 mm)
• Belt Depth: 0.17 inches (4.32 mm)
• Construction: Cord-reinforced with triangular longitudinal ribs for even load distribution across all reinforcement cords

Poly-V belts in the K section are widely used to drive engine accessories such as alternators, power steering pumps, water pumps, and air conditioning compressors. Their multi-ribbed design delivers higher power transmission efficiency, reduced slippage, and the ability to operate on smaller pulley diameters compared to traditional V-belts. The single belt replaces multiple standard V-belts, saving space and simplifying installation.

The 356K4S designation follows the industry-standard K-series naming convention, making cross-referencing straightforward with equivalent part numbers from Gates, Dayco, Goodyear, Bando, NAPA, and other major belt manufacturers.