{"product_id":"ronstan-rf50101-series-50-ball-bearing-block-with-single-loop-top-2-inch-sheave","title":"Ronstan RF50101 Series 50 Ball Bearing Block with Single Loop Top, 2-Inch Sheave","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 Ball Bearing Block - Single Loop Top\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli id=\"isPasted\"\u003eLow friction, 2-stage ball bearing system\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli id=\"isPasted\"\u003eMax. Rope diameter (in): 1\/2\u003c\/li\u003e\n\u003cli\u003eM.W.L. (lb): 1100lbs\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 2\u003c\/li\u003e\n\u003cli\u003eB.L. (lb): 3310lbs\u003c\/li\u003e\n\u003cli\u003eWeight (oz): 3.4oz\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAcetal 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 RF50101 Series 50 Ball Bearing Block with Single Loop Top\u003c\/strong\u003e delivers smooth, low-friction line handling for sailing and marine rigging applications. Designed for use with rope up to 1\/2 inch in diameter, this lightweight single-loop-top block combines a two-stage ball bearing system with durable marine-grade materials for consistent performance across its rated load range.\u003c\/p\u003e\u003cp\u003eThe Acetal ball bearings and UV-stabilized Acetal sheave help support efficient operation, while the Grade 316 stainless steel load strap and head fitting provide a robust connection point. Impact- and UV-resistant, fiber-reinforced nylon cheeks help protect the assembly in demanding marine environments. Cheek cut-outs also make bearing maintenance easier, helping simplify servicing when needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow-friction, two-stage ball bearing system for consistent performance over the full load range\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity for demanding line-handling applications\u003c\/li\u003e\n\u003cli\u003eLightweight construction for easier installation and reduced rigging weight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs provide convenient access for bearing maintenance\u003c\/li\u003e\n\u003cli\u003eSingle loop top configuration for straightforward attachment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Ronstan\u003c\/li\u003e\n\u003cli\u003ePart number: RF50101\u003c\/li\u003e\n\u003cli\u003eProduct type: Series 50 single-loop-top ball bearing block\u003c\/li\u003e\n\u003cli\u003eMaximum rope diameter: 1\/2 inch\u003c\/li\u003e\n\u003cli\u003eSheave diameter: 2 inches\u003c\/li\u003e\n\u003cli\u003eMaximum working load: 1,100 pounds\u003c\/li\u003e\n\u003cli\u003eBreaking load: 3,310 pounds\u003c\/li\u003e\n\u003cli\u003eWeight: 3.4 ounces\u003c\/li\u003e\n\u003cli\u003eBall bearing material: Acetal\u003c\/li\u003e\n\u003cli\u003eSheave material: UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003eLoad strap and head fitting: Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003eCheek material: Impact- and UV-resistant, fiber-reinforced nylon\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Ronstan RF50101 Series 50 Ball Bearing Block when you need a compact, lightweight marine block with smooth operation, durable materials, and practical bearing maintenance access.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Ronstan RF50101 Series 50 ball bearing block with a single loop top, 2-inch sheave, low-friction operation, and 1,100-pound working load.\u003c\/p\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":44934324060249,"sku":"105700","price":61.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/105700XL.jpg?v=1789760055","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-rf50101-series-50-ball-bearing-block-with-single-loop-top-2-inch-sheave","provider":"Marine Parts Only","version":"1.0","type":"link"}