{"product_id":"ronstan-series-30-utility-ball-bearing-block-single-swivel-shackle-head-rf30100","title":"Ronstan Series 30 Utility Ball Bearing Block, Single Swivel Shackle Head RF30100","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Ball Bearing Block - Single, Swivel Shackle Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction 2-stage ball bearing system provides consistent performance over the full working load range.\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity.\u003c\/li\u003e\n\u003cli\u003eLight weight\u003c\/li\u003e\n\u003cli\u003eVersatile head fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\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.Can be fitted with a shackle in either of two planes to allow correct alignment of the block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrimary lead blocks on dinghies and catamarans\u003c\/li\u003e\n\u003cli\u003eControl lines on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eImpact modified, fiber reinforced and U.V. stabilized Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load straps and head fittings\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan Series 30 Utility Ball Bearing Block RF30100\u003c\/strong\u003e is a lightweight, single-sheave sailing block designed for reliable control-line handling on dinghies, catamarans, and larger yachts. Its low-friction, two-stage ball-bearing system supports consistent performance throughout the working load range, helping sailors manage primary lead blocks and control lines with smooth, dependable operation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe swivel shackle head provides versatile rigging options and can be fitted in either of two planes to help maintain proper block alignment. This adaptable design is useful when line direction changes during sailing or when hardware positioning requires flexible alignment. The block combines a high static and dynamic load capacity with a lightweight construction suited to a broad range of marine applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFeature: Low-friction two-stage ball-bearing system provides consistent performance across the working load range.\u003c\/li\u003e\n\u003cli\u003eFeature: High static and dynamic load capacity supports demanding sailing applications.\u003c\/li\u003e\n\u003cli\u003eFeature: Swivel shackle head can be fitted in either of two planes for correct alignment.\u003c\/li\u003e\n\u003cli\u003eFeature: Lightweight construction is suitable for primary lead blocks and control lines.\u003c\/li\u003e\n\u003cli\u003eFeature: Versatile head fittings accommodate flexible rigging arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Ronstan\u003c\/li\u003e\n\u003cli\u003eSeries: 30 Utility\u003c\/li\u003e\n\u003cli\u003ePart number: RF30100\u003c\/li\u003e\n\u003cli\u003eProduct type: Single utility ball bearing block with swivel shackle head\u003c\/li\u003e\n\u003cli\u003eSheaves: UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003eBearings: Acetal ball bearings\u003c\/li\u003e\n\u003cli\u003eCheeks: Impact-modified, fiber-reinforced, UV-stabilized Nylon\u003c\/li\u003e\n\u003cli\u003eLoad straps and head fittings: Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003eApplications: Primary lead blocks on dinghies and catamarans; control lines on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan Series 30 Utility Ball Bearing Block RF30100 for a versatile, low-friction sailing hardware solution built around reliable alignment and proven marine materials.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Ronstan Series 30 Utility Ball Bearing Block RF30100 with low-friction bearings, swivel shackle head, and versatile sailing applications.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLow-friction two-stage ball-bearing system provides consistent performance across the working load range.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHigh static and dynamic load capacity supports demanding sailing applications.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSwivel shackle head can be fitted in either of two planes for correct alignment.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLightweight construction is suitable for primary lead blocks and control lines.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eVersatile head fittings accommodate flexible rigging arrangements.\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":44881641275481,"sku":"72397","price":46.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72397XL.jpg?v=1789190365","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-series-30-utility-ball-bearing-block-single-swivel-shackle-head-rf30100","provider":"Marine Parts Only","version":"1.0","type":"link"}