| Barton Size 4 Ball Bearing Block Double UprightSize 4 ball bearing block double upright, (with or without a fairlead, fairleads prevent line falling away when not under load. Fastenings 5mm). A strong, lightweight range of blocks for use on dayboats and cruising yachts. Ideal for mainsheet, vang tackles, lead blocks or wherever a powerful and compact purchase tackle is required. 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. Length mm: 92 Weight (g): 314 Single 58mm x 17mm (2 1 /4 x 5/8inch) Fiddle 32/58mm x 17mm (1 1 /14 x 2 1/4inch x 5/8inch) Max rope diameter 12mm ( 7 /16inch) SWL 630Kg (1385 lbs) Break load 1260Kg (2770 lbs) Max rolling load (ball bearing blocks) 440kg 970 lbs) |
