Full definition
Flat belt with multiple longitudinal V-shaped ribs on the inner surface, combining the flexibility and high-speed capability of a flat belt with the tracking and traction of a V-belt. Profiles per ISO 9982: PJ (2.34 mm pitch, light duty), PL (4.70 mm, medium), PM (9.40 mm, heavy industrial), PK (3.56 mm, automotive). Can drive multiple accessories from one belt (serpentine). Speed up to 60 m/s. Very thin and flexible, allowing pulley diameters as small as 25 mm. Efficiency: 95-98%. Used extensively in automotive (serpentine), appliances, HVAC, and industrial drives. Brands: Gates Micro-V, Optibelt RB, Continental.