Great Plains 808-141C is a 40B12 chain drive sprocket with a 7/8-inch hex bore and integrated bearing designed for seed meters, drive systems, or conveyor assemblies on Great Plains planting and tillage equipment. Worn sprockets develop hooked teeth that can cause chain skipping, inconsistent drive speeds, and premature chain wear. This sprocket assembly also includes a factory-installed bearing to simplify replacement and restore smooth chain engagement for accurate seed metering and reliable drive performance.