The TB Wood's 421B is a Type C Solid Single Groove Sheave designed for 8V/8VX cross-section V-belts. With an outside diameter of 4.55 inches and a face width of 0.88 inches, this sheave accommodates bore diameters ranging from 1/2 to 1-5/8 inches. Constructed from fine grain, high tensile cast iron, it ensures durability and reliable performance in demanding applications. The sheave features a Quick Detachable (QD‚) bore type, facilitating easy installation and removal. Its design is optimized for vibration-free operation at speeds up to 6,500 feet per minute, making it suitable for various industrial settings. The 421B sheave is engineered to handle the increased performance requirements of higher V-belt ratings, ensuring safe and dependable operation. Its compatibility with 8V/8VX V-belts makes it a versatile choice for applications requiring robust and efficient power transmission solutions.