Martin Conveyor Series stock bore B type roller chain sprockets are used in conveyor systems to drive conveyor chains, facilitating the smooth movement of products along the assembly line or production process. They are suitable for use with the brand's 2042 / C2042 chain and have carrier rollers for efficient product movement. These type B hubs ensure a stable and secure attachment to the shaft. They are offered in shaft diameters of 5/8 and 3/4 inches with high carbon steel construction for added strength / durability in demanding environments.