The Schaefer Aluminium Circuit sheaves (UC) are extremely low friction ball bearing sheaves accommodating both line and wire.
High strength self-contained Delrimâ„¢ bearing package, and Nomexâ„¢/Teflonâ„¢ self-lubricating busing is used in all "UC" sheaves. The combined benefits of the design mean easier turning under the heaviest loads.