{"product_id":"ronstan-series-55-orbit-block","title":"Ronstan Series 55 Orbit Block","description":"\u003cp\u003eThe Ronstan Series 55 Orbit Block™ Upright Lead features a low friction 2-stage orbital ball bearing system delivering the highest working load in its class at minimum weight. The unique orbital design places bearings only in the active areas of the floating sheave, minimising mass in the inactive return race and hub. The floating sheave and bearing system is supported by a computer-modelled, stress-optimised fibre-reinforced load frame. Requires 2 x 6mm (1\/4\") fasteners for mounting.\u003c\/p\u003e\u003cp\u003eSuited to mainsheet systems on dinghies, sportsboats and small keelboats to 9m, halyard, vang and backstay applications on boats to 8m, and control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF55171\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Upright lead\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 55mm\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1,000kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 500kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 91g\u003cbr\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e 2 x 6mm (1\/4\") fasteners required\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003cbr\u003e- Sheave: Carbon fibre reinforced, PTFE impregnated nylon\u003cbr\u003e- Ball bearings: High compression strength carbon black acetal\u003cbr\u003e- Stage 2 bearing: Carbon fibre reinforced, PTFE impregnated nylon\u003cbr\u003e- Frame\/cheeks: Toughened, glass fibre reinforced nylon\u003cbr\u003e- Rope link: UV stabilised, multi-strand impregnated SK75 Dyneema®\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48470380019944,"sku":"9316800373499","price":59.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800373499_1.jpg?v=1777719819","url":"https:\/\/boatharbourmarine.com.au\/products\/ronstan-series-55-orbit-block","provider":"Boat Harbour Marine","version":"1.0","type":"link"}