{"product_id":"ronstan-rf41811-series-40-all-purpose-block-single-cheek","title":"Ronstan RF41811 Series 40 All Purpose Block, Single Cheek","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 All Purpose Block - Single Cheek\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating sheave\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Can be mounted on masts and booms using the curved surface adapter. Can be stacked to create a double version, but no more than 60% of the rated working load should be applied to the upper sheave. Stackable with Ronstan Series 40 deck organizers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eAlloy cheek plates\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan Series 40 All Purpose Block - Single Cheek\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eDesigned for sailors who need a versatile, durable solution for onboard line control, the Ronstan RF41811 Series 40 All Purpose Block delivers dependable performance for cruising and racing applications. Its self-lubricating Acetal polymer sheave runs on polished Grade 316 stainless steel races, allowing the block to perform effectively with both dynamic and high static loads. Use it for mainsheets, halyards, vangs, and spinnaker control lines on off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe single-cheek block is built for low maintenance and long service life in demanding sailing environments. It can be mounted on masts and booms with the appropriate curved surface adapter, stacked to create a double block, or combined with Ronstan Series 40 deck organizers. When stacked, no more than 60% of the rated working load should be applied to the upper sheave. This flexible design makes the RF41811 a practical choice when configuring reliable control-line systems for a wide range of sailing setups.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Exceptionally high working loads support demanding sheet, halyard, vang, and control-line applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Self-lubricating Acetal polymer sheave helps provide low-maintenance operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Polished Grade 316 stainless steel bearing race supports smooth operation under dynamic and high static loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Stackable design can create a double block and is compatible with Ronstan Series 40 deck organizers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Mounting capability with a curved surface adapter allows installation on masts and booms.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RF41811\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Series 40 All Purpose Block, single cheek\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave material:\u003c\/strong\u003e UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheek material:\u003c\/strong\u003e Impact- and UV-resistant, fiber-reinforced Nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing race:\u003c\/strong\u003e Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional material:\u003c\/strong\u003e Alloy cheek plates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Mainsheet, halyard, vang, and spinnaker control lines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended boat use:\u003c\/strong\u003e Off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF41811 Series 40 All Purpose Block for a durable, adaptable component in your sailing control-line system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Ronstan RF41811 Series 40 All Purpose Block for sailing control lines, featuring a self-lubricating sheave and durable construction.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eExceptionally high working loads support demanding sheet, halyard, vang, and control-line applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSelf-lubricating Acetal polymer sheave helps provide low-maintenance operation.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePolished Grade 316 stainless steel bearing race supports smooth operation under dynamic and high static loads.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eStackable design can create a double block and is compatible with Ronstan Series 40 deck organizers.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMounting capability with a curved surface adapter allows installation on masts and booms.\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671323737,"sku":"70607","price":98.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70607XL.jpg?v=1789193739","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf41811-series-40-all-purpose-block-single-cheek","provider":"Marine Parts Only","version":"1.0","type":"link"}