{"product_id":"ronstan-series-60-single-core-block","title":"Ronstan Series 60 Single Core Block","description":"\u003cp\u003eThe Ronstan Series 60 Core Block™ Single is a true all-round solution for sheets, halyards, and control line applications on cruising and racing yachts. A tuned 2-stage bearing system delivers class-leading performance across the full working load range — under moderate loads, acetal ball bearings ensure minimum friction; under heavy loads, a sliding acetal bearing on a polished stainless steel race takes over to maintain low friction. An integrated thrust bearing prevents the sheave from rubbing on the cheeks when the line lead isn't perfect.\u003c\/p\u003e\u003cp\u003eThe universal head provides full 3-axis articulation and can be locked at 0° or 90° using a 2.5mm hex key, or left free to swivel. The central hub doubles as a becket take-off or tie-up point for lines up to 11.5mm. Alloy cheek plates are cut-away for minimum weight and easy fresh water rinsing. An alloy sheave version for wire rope is also available.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSheave:\u003c\/strong\u003e UV stabilised acetal (2-3\/8\" diameter)\u003cbr\u003e\u003cstrong\u003eCheek Plates:\u003c\/strong\u003e Aluminium alloy, cut-away design\u003cbr\u003e\u003cstrong\u003eBall Bearings:\u003c\/strong\u003e High compression strength carbon black acetal\u003cbr\u003e\u003cstrong\u003eShackle, Post \u0026amp; Hub:\u003c\/strong\u003e Grade 316 stainless steel\u003cbr\u003e\u003cstrong\u003eHead:\u003c\/strong\u003e Universal, full 3-axis articulation — lockable at 0° or 90° (2.5mm hex key)\u003cbr\u003e\u003cstrong\u003eHub:\u003c\/strong\u003e Becket take-off or tie-up point, max 11.5mm line\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 1\/2\"\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 1\/4\"\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 2,200 lb\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 4,410 lb\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 8.3 oz\u003cbr\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF64100\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48387487957224,"sku":"9316800446070","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800446070_1_4eb813ca-d7f1-4d41-bfb6-ff54b36f3322.jpg?v=1777287733","url":"https:\/\/boatharbourmarine.com.au\/products\/ronstan-series-60-single-core-block","provider":"Boat Harbour Marine","version":"1.0","type":"link"}