The Barton Marine 20mm sheave, Series 0 pulley block is designed for high strength and performance, but lightweight with the range starting at only 13 grams. Ideal for use on dinghies, dayboats and smaller craft or as lead blocks,flag pennants on larger yachts. Each plain bearing block has a precision moulded Acetal Sheave running a large diameter brass centre bearing ensuring free running under the highest of loads. Available as Plain or Ball Bearing Blocks. Plain bearing blocks: Barton plain bearing blocks have a precision moulded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads. Ball bearing blocks: With our unique super-low friction ball race systems, featuring acetal sheaves and delrin ball bearings, running on a large diameter centre boss. This allows us to fit more load-bearing balls, which ensure extremely low friction performance, even under high loads.
