{"product_id":"ronstan-series-55-ratchet-orbit-block-single-swivel-head-auto-manual-rf56100","title":"Ronstan Series 55 Ratchet Orbit Block - Single - Swivel Head - Auto \u0026 Manual [RF56100]","description":" \u003cp\u003e\u003cb\u003eSeries 55 Ratchet Orbit Block™ - Single - Swivel Head - Auto \u0026amp; Manual\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAutomatic Ratchet Block\u003c\/b\u003e\u003cbr\u003eNow you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong.\u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003cb\u003eAwesome Ratchet Block Holding Power\u003c\/b\u003e\u003cbr\u003eQuite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUp to 20:1 holding power\u003c\/li\u003e\n\u003cli\u003eSmooth easing of sheets\u003c\/li\u003e\n\u003cli\u003eHigh performance cleating\u003c\/li\u003e\n\u003cli\u003eSwivel shackle head for unlimited block rotation.\u003c\/li\u003e\n\u003cli\u003eStainless steel shackle head for ultimate durability and compatibility with harsh fixing points.\u003c\/li\u003e\n\u003cli\u003eAutomatic \u0026amp; manual ratchet block\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eMainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 8M(26')\u003c\/li\u003e\n\u003cli\u003eHalyard, vang and backstay applications on boats to 8M(26')\u003c\/li\u003e\n\u003cli\u003eSpinnaker sheets on sportsboats and small keel boats (lateral lead blocks)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eSheave: Hard anodised Aluminium\u003c\/li\u003e\n\u003cli\u003eBall Bearings: High compression strength carbon black Aceetal\u003c\/li\u003e\n\u003cli\u003eFrame\/Cheeks: Toughened, glass fiber reinforced Nylon\u003c\/li\u003e\n\u003cli\u003eRope Link: UV stabilized, multi-strand impregnated SK75 Dyneema®\u003c\/li\u003e\n\u003cli\u003eHead fitting: grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eSheave Ø:\u003c\/b\u003e\t55mm(2\")\u003cbr\u003e\u003cb\u003eMax. Rope Ø:\u003c\/b\u003e    10mm(1\/2\")\u003cbr\u003e\u003cb\u003eM.W.L.:\u003c\/b\u003e\t250kg(550lbs)\u003cbr\u003e\u003cb\u003eB. L.:\u003c\/b\u003e\t650kg(1,430lbs)\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e\t82g(2.9oz) \u003c!--- cis2:m2lsnZpq ---\u003e\u003cstyle\u003e.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }\u003c\/style\u003e\u003cdiv class=\"embed-container\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/u_Zc_KYMbuE\" frameborder=\"0\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":50561126302017,"sku":"WWP-55257","price":93.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/1138\/8993\/files\/55257XL.jpg?v=1751049233","url":"https:\/\/www.wakeworldparts.com\/products\/ronstan-series-55-ratchet-orbit-block-single-swivel-head-auto-manual-rf56100","provider":"Wake World Parts","version":"1.0","type":"link"}