The TB Wood's 2BK3478 is a light-duty solid FHP sheave designed for efficient power transmission in fractional horsepower applications. With a 7/8" finished bore diameter and a 3.55" outside diameter, this sheave accommodates A (4L) or B (5L) cross-section V-belts, providing versatility for various belt configurations. The single groove design ensures optimal belt engagement, while the 0.88" face width offers a compact solution for space-constrained setups. Constructed from high-quality cast iron, the 2BK3478 sheave delivers durability and reliable performance, making it a suitable choice for applications requiring efficient and economical power transmission solutions.