The TB Wood's 2VP5078 2-Groove Variable Pitch Sheave with 7/8" Bore, 4-3/4" OD, Cast Iron is engineered to provide precise speed and torque adjustments in belt-driven systems. This sheave features a 2-groove design compatible with multiple belt sections, including B, O, 3L, 4L, 5L, A, and 5V, offering versatility for various applications. The 7/8" bore diameter with a finished keyway ensures secure attachment to shafts, while the cast iron construction delivers durability and resistance to wear. The sheave's variable pitch design allows for easy speed adjustments, optimizing performance and efficiency in machinery. With a maximum pitch diameter of 4-3/4" and a minimum of 3.27", it accommodates a range of operational requirements. The 3" length through bore facilitates installation and maintenance, and the sheave's weight of 6.30 lbs provides stability during operation. This product is ideal for applications requiring reliable and adjustable belt drive solutions, such as conveyor systems, pumps, and compressors.