RF55521%3A%20SERIES%2055%20ORBIT%20BLOCK%26trade%3B%2C%20FIDDLE%20WITH%20CAM%20CLEAT%20%26amp%3B%20LINK%20HEADFiddle%20block%20with%20adjustable%20cleat%20and%20Dyneema%26reg%3B%20Link%20Head.%0D%0AFEATURES%0D%0A%0D%0AUltra%20Lightweight%0D%0ALow%20friction%202-stage%20Orbital%20ball%20bearing%20system%0D%0AHighest%20working%20load%20in%20its%20class%0D%0ALow%20profile%20and%20compact%0D%0AHigh%20performance%20cleating%0D%0AEasily%20fitted%20and%20securely%20retained%20Dyneema%26reg%3B%20Link%20head%0D%0AComposite%20C-Cleat%26trade%3B%20and%20fairlead%0D%0A%0D%0ASPECIFICATIONS%0D%0A%0D%0ASheave%20diameter%20(mm)%2055%20%2B%2035%0D%0AB.L.%20(kg)%201000%0D%0AM.W.L.%20(kg)%20500%0D%0AMax.%20Rope%20diameter%20(mm)%2010%0D%0AWeight%20(g)%20231%0D%0ANotes%3A%20Small%20fiddle%20block%20sheave%20has%20a%20high%20load%20full%20contact%20bearing%20(i.e.%20not%20ball%20bearing).%20Main%20sheave%20has%202-stage%2C%20ball%20bearing.%20Line%20load%20through%20cleat%20not%20to%20exceed%20175kg%20(385lb).%20Replacement%20Link%3A%20RF9004-08.%20Replacement%20Retainer%20Clip%3A%20RF5001%0D%0A%0D%0APRODUCT%20INFORMATION%0D%0ALightweightKilogram%20for%20kilogram%20of%20working%20load%2C%20BB%20and%20RT%20Orbit%20Blocks%26trade%3B%20are%20the%20world%26rsquo%3Bs%20lightest.%20The%20unique%20orbital%20design%20allows%20the%20bearing%20to%20only%20be%20in%20the%20active%20areas%20of%20the%20floating%20sheave.%20This%20minimises%20the%20mass%20of%20the%20inactive%20return%20race%20and%20hub.%20Weight%20and%20bulk%20are%20further%20reduced%20in%20the%20different%20block%20configurations.%20The%20ball%20bearing%20single%20and%20becket%20block%20has%20a%20through-sheave%20becket%20arrangement.%20The%20result%3F%20The%20lowest%20weight%20possible.%20Multi-sheave%20blocks%20have%20only%20single%20intermediate%20cheeks%20and%20an%20ultra-light%20and%20efficient%20head%20arrangement.%20This%20gives%20a%2030%25%20weight%20saving%20advantage%20over%20the%20nearest%20competitor.%20Other%20brands%20just%20link%20together%20their%20single%20blocks.%20This%20results%20in%20unnecessary%20double%20cheeks%20between%20each%20sheave%2C%20held%20together%20by%20a%20heavy%20steel%20channel%20across%20the%20top%20of%20the%20block.%0D%0AHighest%20working%20load%20in%20its%20classThe%20orbital%20ball-bearing%20arrangement%20gives%20the%20largest%20possible%20bearing%20race%20diameter.%20This%20maximises%20load%20performance.%20The%20proven%20Ronstan%202-stage%20bearing%20system%20features%20high%20compression%20grade%20acetal%20ball%20bearings%20and%20a%20secondary%20full-contact%20bearing.%20This%20gives%20minimum%20friction%20across%20the%20full%20working%20load%20range.%20The%20floating%20sheave%20and%20bearing%20system%20is%20supported%20by%20a%20fibre-reinforced%20load%20frame.%20The%20design%20was%20computer%20modelled%20to%20be%20stress%20optimised.%20The%20Dyneema%26reg%3B%20Link%20is%20produced%20from%20Robline%20SK75%20fibre%2C%20which%20is%2010%20times%20stronger%20and%20lighter%20than%20steel%2C%20and%20provides%20the%20final%20connection%20from%20the%20block%20to%20the%20load%20point.%0D%0AHigh%20performance%20cleatingBoth%20Ronstan%20BB%20and%20RT%20Orbit%20Blocks%26trade%3B%20feature%20strong%2C%20lightweight%20fibre-reinforced%20cleat%20arms.%20They%20have%20a%20wide%20range%20of%20adjustment%20and%20calibration%20marks%2C%20perfect%20for%20selecting%20your%20preferred%20cleating%20angle%20settings.%20The%20race-proven%20carbon-fibre%20reinforced%20Ronstan%20C-Cleat%26trade%3B%20give%20secure%20rope%20holding%20with%20low%20entry%20and%20exit%20efforts%2C%20and%20are%20fitted%20with%20fairleads%20for%20fast%20action%20from%20any%20angle.%0D%0AFiddle%20block%20flexibilityBecket%20fiddle%20blocks%20use%20a%20Dyneema%26reg%3B%20Link%20attachment%20for%20the%20sheet%20termination%20and%20are%20suitable%20for%20both%20spliced%20and%20un-spliced%20lines.%20If%20you%20need%20additional%20purchase%2C%20a%20becket%20take-off%20can%20be%20simply%20added%20to%20any%20fiddle%20block%20version%20just%20by%20adding%20a%20Dyneema%26reg%3B%20Link.%0D%0AAPPLICATIONS%0D%0A%0D%0AMainsheet%20systems%20on%20dinghies%2C%20sportsboats%20and%20small%20keelboats%20to%209m%20(30ft)%0D%0AHalyard%2C%20Vang%20and%20Backstay%20application%20on%20boats%20to%208m%20(26ft)%0D%0AControl%20line%20applications%20on%20larger%20yachts.%0D%0A%0D%0AMATERIALS%0D%0A%0D%0ABall%20bearings%20-%20High%20compression%20strength%20acetal%0D%0AStage%202%20bearing%20-%20Carbon%20fibre%20reinforced%2C%20PTFE%20impregnated%20Nylon%0D%0AFrame%2FCheeks%20-%20Toughened%2C%20glass%20fibre%20reinforced%20Nylon%0D%0ARope%20Link%3A%20UV%20stabilised%2C%20multi-strand%20impregmented%20SK75%20Dyneema%26reg%3B