{"product_id":"ronstan-series-55-orbit-cheek-block","title":"Ronstan Series 55 Orbit Cheek Block","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 55 Orbit Cheek Block\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLightweight\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eKilogram for kilogram of working load, BB and RT Orbit Blocks are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub. Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result The lowest weight possible. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHighest working load in its class\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range. The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUltra Lightweight.\u003c\/li\u003e\n\u003cli\u003eLow friction 2-stage Orbital ball bearing system.\u003c\/li\u003e\n\u003cli\u003eHighest working load in its class.\u003c\/li\u003e\n\u003cli\u003eLow profile and compact.\u003c\/li\u003e\n\u003cli\u003eRecessed underside to suit cruved mounting surface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 3\/8\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 2 5\/32\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 3\/16\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBall bearings: High compression strength carbon black Acetal.\u003c\/li\u003e\n\u003cli\u003eStage 2 bearing: Carbon fibre reinforced, PTFE impregnated Nylon.\u003c\/li\u003e\n\u003cli\u003eFrame\/Cheeks: Toughened, glass fibre reinforced Nylon.\u003c\/li\u003e\n\u003cli\u003eSheave: Carbon fibre reinforced, PTFE impregnated Nylon.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53594459373940,"sku":"RONRF55151","price":56.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF55151-2__15612.jpg.1428984928.jpg?v=1761730495","url":"https:\/\/velasailingsupply.com\/products\/ronstan-series-55-orbit-cheek-block","provider":"Vela Sailing Supply","version":"1.0","type":"link"}