Barton Stand Up Pulley Block, Size 5. N05170 & N15170 The Barton Marine 54mm sheave, Series 5 pulley blocks are a range of high load cruiser blocks, featuring high grade injection moulded side plates, with all load-carrying components made from 316 grade stainless steel. The side plates are through-bolted and riveted for added strength and security. This good looking and versatile range is designed for use on larger cruising and racing yachts. All are designed for use with Barton Marine's ball bearing mainsheet traveller systems. A comprehensive range of multiple sheave options, together with fiddles and cam cleat blocks, allow powerful, lightweight tackles to be achieved. 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.
