{"title":"Series 20 Ball Bearing\/ High Load Blocks","description":"","products":[{"product_id":"ronstan-series-20-nylatron-sheave","title":"Ronstan Series 20 Nylatron Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Nylatron Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese sheaves are made from a unique plastic material which is suitable for use with wire. Nylatron is a cast, partially cross-linked polyamide compound which has been modified with a MoS2 filler. It has excellent wear resistance, self lubrication and low friction properties.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent wear resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBore (in): 5\/16\u003c\/li\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eDiameter Ø (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eWidth (in): 3\/8\u003c\/li\u003e\n\u003cli\u003eInternal Ø (in): 5\/16\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596230746484,"sku":"RONRF20000HL","price":16.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20000HL-2__50743.jpg.1428984928.jpg?v=1761734445"},{"product_id":"ronstan-series-20-ball-bearing-single-block-with-swivel-shackle","title":"Ronstan Series 20 Ball Bearing Single Block with Swivel Shackle","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Block with Swivel Shackle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin Ø (in): 1\/8\u003c\/li\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596230844788,"sku":"RONRF20100","price":23.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20100-2__59120.jpg.1428984928.jpg?v=1761734446"},{"product_id":"ronstan-series-20-ball-bearing-single-block-with-loop-top","title":"Ronstan Series 20 Ball Bearing Single Block with Loop Top","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Block with Loop Top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003eCan be fitted with a shackle in either of two planes to allow correct alignment of the block.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596231467380,"sku":"RONRF20101","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20101-2__44881.jpg.1428984928.jpg?v=1761734447"},{"product_id":"ronstan-series-20-high-load-block-with-nylatron-sheave-and-loop-top","title":"Ronstan Series 20 High Load Block with Nylatron Sheave and Loop Top","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 High Load Block with Nylatron Sheave and Loop Top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIdeal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire.\u003c\/p\u003e\n\u003cp\u003eCan be fitted with a shackle in either of two planes to allow correct alignment of the block.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExceptionally high working loads.\u003c\/li\u003e\n\u003cli\u003eLightweight.\u003c\/li\u003e\n\u003cli\u003eSuitable for both rope or wire\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596231565684,"sku":"RONRF20101HL","price":28.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20101HL-2__04478.jpg.1428984928.jpg?v=1761734448"},{"product_id":"ronstan-series-20-ball-bearing-single-block-with-becket-and-loop-top","title":"Ronstan Series 20 Ball Bearing Single Block with Becket and Loop Top","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Block with Becket and Loop Top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003eCan be fitted with a shackle in either of two planes to allow correct alignment of the block.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596232221044,"sku":"RONRF20111","price":16.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20111-2__06336.jpg.1428984928.jpg?v=1761734448"},{"product_id":"ronstan-series-20-stand-up-ball-bearing-block","title":"Ronstan Series 20 Stand-Up Ball Bearing Block","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Stand-Up Ball Bearing Block\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 5\/32\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStainless steel ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilised 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, fibre reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596232319348,"sku":"RONRF20141","price":22.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20141-2__78132.jpg.1428984928.jpg?v=1761734449"},{"product_id":"ronstan-series-20-ball-bearing-cheek-block","title":"Ronstan Series 20 Ball Bearing Cheek Block","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Cheek Block\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\u003cli\u003eDouble through-bolt mounting for maximum load capacity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 5\/32\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596232974708,"sku":"RONRF20151","price":18.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RF20151.jpg?v=1780291499"},{"product_id":"ronstan-series-20-ball-bearing-single-cheek-block-rivet-mount","title":"Ronstan Series 20 Ball Bearing Single Cheek Block rivet mount","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Cheek Block rivet mount\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\u003cli\u003eSuitable for screw or pop rivet mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596233040244,"sku":"RONRF20151A","price":22.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RF20151A.jpg?v=1780291243"},{"product_id":"ronstan-series-20-ball-bearing-single-upright-lead-block","title":"Ronstan Series 20 Ball Bearing Single Upright Lead Block","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Upright Lead Block\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 5\/32\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGrade 316 stainless steel ball bearings. UV stabilised Acetal sheave. Grade 316 stainless steel load housing\u003c\/p\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596233728372,"sku":"RONRF20171","price":24.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20171-2__31708.jpg.1428984928.jpg?v=1761734452"},{"product_id":"ronstan-series-20-ball-bearing-single-pivoting-lead-block","title":"Ronstan Series 20 Ball Bearing Single Pivoting Lead Block","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Pivoting Lead Block\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e180 degree pivoting sheave\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 5\/32\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGrade 316 stainless steel ball bearings. UV stabilised Acetal sheave. Grade 316 stainless steel load housing\u003c\/p\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596234383732,"sku":"RONRF20174","price":40.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20174-2__36055.jpg.1428984928.jpg?v=1761734453"},{"product_id":"ronstan-series-20-ball-bearing-pivoting-lead-block-with-small-c-cleat-fairlead","title":"Ronstan Series 20 Ball Bearing Pivoting Lead Block with Small C-Cleat \u0026 Fairlead","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Pivoting Lead Block with Small C-Cleat \u0026amp; Fairlead\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSwivel cleat bases permit easy cleating and releasing from any angle.\u003c\/p\u003e\n\u003cp\u003eSheave can be relocated to allow the control line to feed from below. Comes complete with Series 20 ball bearing sheave, small ‘C-Cleat’ and the ‘Fast Track’ fairlead. Contact Ronstan for details. Line load should be limited to: MWL 125kg (275lb).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRope Ø (in): 3\/32 - 1\/4\u003c\/li\u003e\n\u003cli\u003eM.W.L. (lb): 330\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGrade 316 stainless steel ball bearings. UV stabilised Acetal sheave. Grade 316 stainless steel load housing\u003c\/p\u003e\n","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596234482036,"sku":"RONRF20175","price":76.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20175-2__58658.jpg.1428984928.jpg?v=1761734454"},{"product_id":"ronstan-series-20-ball-bearing-single-block-with-hook","title":"Ronstan Series 20 Ball Bearing Single Block with Hook","description":"\u003cp\u003e\u003cstrong\u003eRonstan Ronstan Series 20 Ball Bearing Single Block with Hook\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\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\u003cli\u003eLow profile swivelling hook for quick and easy attachment.\u003c\/li\u003e\n\u003cli\u003eHook suits rope, stainless steel and webbing fixing points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/4\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStainless steel ball bearings. UV stabilised Acetal sheave. Grade 316 stainless steel load strap and head fitting. Impact and UV resistant, fibre reinforced Nylon cheeks\u003c\/p\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53596235170164,"sku":"RONRF20180","price":26.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF20180-2__07723.jpg.1428984928.jpg?v=1761734457"},{"product_id":"ronstan-series-20-ball-bearing-single-block-with-loop-mount","title":"Ronstan Series 20 Ball Bearing Single Block with Loop Mount","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Single Block with Loop Mount\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrecision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance \u0026amp; low friction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow friction.\u003c\/li\u003e\n\u003cli\u003eSingle point mounting\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity.\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. 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