The TB Wood's 683B 6.8X3B-SD Conventional Sheave is engineered to provide reliable performance in a variety of power transmission applications. Designed for B and A section belts, this sheave features a 7.15-inch outside diameter and three grooves, ensuring compatibility with standard drives. Constructed from high-quality cast iron, it offers superior strength and longevity under heavy loads. The webbed pulley construction enhances belt engagement and reduces slippage, ensuring efficient power transfer. Precision-machined surfaces facilitate smooth operation and minimize wear on belts, extending the lifespan of both the sheave and the belts. The sheave requires a QD-type bushing, which is sold separately, and is suitable for bore diameters ranging from 1/2 to 2 inches. Its face width is 2.5 inches, and it has a length through bore of 1.8125 inches. The sheave's pitch diameter is 6.4 inches for A section belts and 6.8 inches for B section belts. With a weight of 10.4 lbs, it is designed for easy installation and maintenance. This sheave is ideal for use in various machinery, such as conveyor systems, pumps, and fans, where reliable power transmission is critical. It is specifically designed to work seamlessly with B and A section belts, making it a versatile choice for retrofit and new installations. The robust construction minimizes wear and tear, reducing maintenance needs and prolonging service life. The precise design minimizes energy loss during operation, ensuring that more power is transmitted to the driven equipment. The sheave's webbed construction enhances belt engagement and reduces slippage, ensuring efficient power transfer. Its precision-machined surfaces facilitate smooth operation and minimize wear on belts, extending the lifespan of both the sheave and the belts. The sheave requires a QD-type bushing, which is sold separately, and is suitable for bore diameters ranging from 1/2 to 2 inches. Its face width is 2.5 inches, and it has a length through bore of 1.8125 inches. The sheave's pitch diameter is 6.4 inches for A section belts and 6.8 inches for B section belts. With a weight of 10.4 lbs, it is designed for easy installation and maintenance.