The Mi-T-M 850-0177 Sheave Assembly/Idler supports smooth belt movement and proper alignment in compatible equipment. It works with the drive belt and pulley system to guide rotation and maintain consistent power transfer during operation. This replacement assembly is suitable for repair or maintenance when the original component becomes worn or damaged. A properly fitted sheave and i... https://www.wholetoolbox.com/mi-t-m-850-0177-sheave-assembly-idler/850-0177.html