{"product_id":"ronstan-series-40-all-purpose-cheek-block","title":"Ronstan Series 40 All Purpose Cheek Block","description":"\u003cp\u003eThe Ronstan Series 40 All Purpose Cheek Block is a single sheave cheek block with stainless steel cheeks, built for sheets, halyards, and control line applications on cruising and racing yachts. Self-lubricating Acetal polymer sheaves running on polished Grade 316 stainless steel races perform equally well under dynamic and high static loads, delivering a long, low-maintenance service life. The block can be mounted on masts and booms using a curved surface adapter, and stacked to create a double configuration — though no more than 60% of the rated working load should be applied to the upper sheave when stacked. Requires 3 x 5mm (3\/16\") fasteners (not supplied).\u003c\/p\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Cheek\/Foot\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 40mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1000kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 400kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 66g\u003cbr\u003e\u003cstrong\u003eFastener Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eQty. Fasteners:\u003c\/strong\u003e 3\u003cbr\u003e\u003cstrong\u003eSheave:\u003c\/strong\u003e UV stabilised Acetal polymer\u003cbr\u003e\u003cstrong\u003eBearing Race:\u003c\/strong\u003e Grade 316 stainless steel\u003cbr\u003e\u003cstrong\u003eCheeks:\u003c\/strong\u003e Grade 316 stainless steel\u003cbr\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e Mainsheet, halyard, vang, spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003cbr\u003e\u003cbr\u003eItem Code. RF41151","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48559791243496,"sku":"9316800244331","price":33.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800244331_1.jpg?v=1778812284","url":"https:\/\/boatharbourmarine.com.au\/products\/ronstan-series-40-all-purpose-cheek-block","provider":"Boat Harbour Marine","version":"1.0","type":"link"}