The Acetal Sheave with Dynamic Bearing utilizes our patented twin row stainless-steel ball bearing system for exceptional load-carrying capacity and longevity. Compared to other bearing systems with plastic rails or balls, this system offers superior performance. The unique shape of our ball bearings allows for fast rolling speeds and minimal friction on the sheave, bearing, and axle. Additionally, the caged ball bearings on this sheave reduce friction even further with a carefully designed cage that separates the balls for smooth rolling and minimal resistance.