Premium 12B Roller Chain - 10ft Box filter_H35B72 50B56 sprockets with a stock

50B56 sprockets with a stock bore comes with the standard 1" inside diameter hole with no keyway or setscrews and can be easily machine bored to custom sizes

Size: 1B50SDS

Sheave Size: 10C90J

and precision double single sprocket with 18 hardened teeth that is manufactured to accept a 3020 bushing

Premium 12B Roller Chain - 10ft Box filter_H35B72 50B56 sprockets with a stockPremier Series 12B roller chain provides the best in class performance, working life, and strength. This 12B roller chain features fully heat treated and shot peened components that are manufactured using a high quality carbon steel, along with solid bushings and solid rollers and high precision construction. Heat treated and shot peened high quality carbon steel precision components make the chain much stronger and increases the overall shock load