{"product_id":"ronstan-rf20141-series-20-single-ball-bearing-block-with-stand-up-loop-top","title":"Ronstan RF20141 Series 20 Single Ball Bearing Block with Stand-Up Loop Top","description":"\u003cp\u003e\u003cstrong\u003eSeries 20 Ball Bearing Block- Single, Stand-Up Loop Top\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePrecision molded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance  low friction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghy control lines\u003c\/li\u003e\n\u003cli\u003eDinghy vangs\u003c\/li\u003e\n\u003cli\u003eCunninghams\u003c\/li\u003e\n\u003cli\u003eTraveler controls\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStainless steel ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilized Acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan RF20141 Series 20 Single Ball Bearing Block with Stand-Up Loop Top\u003c\/strong\u003e is a lightweight, low-friction sailboat block designed for dinghy control lines, dinghy vangs, Cunninghams, and traveler controls. Its compact single-sheave configuration helps provide smooth line handling while supporting both static and dynamic loads in a range of small-craft sailing applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe precision-molded Acetal sheave operates on stainless steel ball bearings to support high-performance, low-friction movement. This construction is suited to control-line systems where responsive handling and reliable load support are important. The stand-up loop top provides a practical attachment arrangement for appropriate sailing hardware and rigging layouts.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eRonstan builds the Series 20 block with materials selected for marine use, including a UV-stabilized Acetal sheave, Grade 316 stainless steel load strap and head fitting, and impact- and UV-resistant, fiber-reinforced Nylon cheeks. These materials help define the block’s lightweight construction while supporting its intended use on dinghies and other small sailboats. The RF20141 is a focused solution for sailors and riggers looking to replace or configure control-line hardware with a Ronstan Series 20 ball bearing block.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Low-friction operation\u003c\/strong\u003e — Precision-molded Acetal sheave and ball-bearing construction support smooth control-line movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Load capacity\u003c\/strong\u003e — Designed for high static and dynamic load capacity in suitable sailing control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Lightweight construction\u003c\/strong\u003e — Helps provide practical hardware for dinghy and small-craft rigging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Stand-up loop top\u003c\/strong\u003e — Provides a single-block configuration for compatible attachment and control-line layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Marine-oriented materials\u003c\/strong\u003e — Includes stainless steel, UV-stabilized Acetal, and impact- and UV-resistant fiber-reinforced Nylon components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\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 RF20141\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Series 20 single ball bearing block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop style:\u003c\/strong\u003e Stand-up loop top\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave:\u003c\/strong\u003e Precision-molded UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Stainless steel ball bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad strap and head fitting:\u003c\/strong\u003e Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheeks:\u003c\/strong\u003e Impact- and UV-resistant, fiber-reinforced Nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Dinghy control lines, dinghy vangs, Cunninghams, and traveler controls\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF20141 Series 20 block for purpose-built, low-friction control-line hardware in dinghy and small-craft sailing applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Ronstan RF20141 Series 20 single ball bearing block with stand-up loop top for low-friction dinghy and small-craft control lines.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLow-friction operation — Precision-molded Acetal sheave and ball-bearing construction support smooth control-line movement.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHigh static and dynamic load capacity — Designed for suitable dinghy and small-craft sailing control applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLightweight construction — Practical for dinghy control lines, vangs, Cunninghams, and traveler controls.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eStand-up loop top — Single-block configuration for compatible sailing hardware and rigging layouts.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMarine-oriented materials — UV-stabilized Acetal, Grade 316 stainless steel, and fiber-reinforced Nylon components.\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":44881668669529,"sku":"70783","price":37.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70783XL.jpg?v=1789193467","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf20141-series-20-single-ball-bearing-block-with-stand-up-loop-top","provider":"Marine Parts Only","version":"1.0","type":"link"}