{"product_id":"ronstan-series-20-ball-bearing-block-upright-lead","title":"Ronstan Series 20 Ball Bearing Single Upright Lead Block, 20mm Sheave, 250kg MWL","description":"\u003cp\u003e\u003cstrong\u003eOptimize your sailing rig's efficiency and responsiveness\u003c\/strong\u003e with the Ronstan Series 20 Ball Bearing Single Upright Lead Block. Engineered for dinghy and small keelboat sailors, this high-performance block provides the low-friction, precise feedback crucial for detecting subtle wind changes and sailing as efficiently as possible. Its low-profile design is ideal for routing halyards and sail controls cleanly and effectively, ensuring smooth operation under both static and dynamic loads. Upgrade your control systems today for superior performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision 20mm Sheave:\u003c\/strong\u003e Handles up to 6mm (1\/4\") rope, ensuring smooth line guidance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Load Capacity:\u003c\/strong\u003e Offers a Maximum Working Load (MWL) of 250kg (550lbs) and a Breaking Load (BL) of 550kg (1,210lbs) for reliable performance under pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Two-Stage Bearing System:\u003c\/strong\u003e Features UV-stabilized Acetal sheaves with stainless steel ball bearings for exceptional low-friction efficiency at moderate loads, transitioning to a sliding acetal bearing on a stainless steel race to manage high loads without distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built with Grade 316 stainless steel load housing and impact-resistant, UV-stabilized acetal sheaves for long-term reliability in harsh marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Design:\u003c\/strong\u003e Weighing just 18g (0.6oz), it adds minimal mass to your rigging, maintaining optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications \u0026amp; Pairings:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTypically used for halyards at the mast base.\u003c\/li\u003e\n\u003cli\u003eExcellent for running control lines under the deck or for any hand-held control lines where sensitivity and efficiency are paramount.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":53306713833790,"sku":"CT-118354","price":24.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0287\/3235\/8731\/files\/55137XL.jpg?v=1779140308","url":"https:\/\/www.tugandtow.com\/products\/ronstan-series-20-ball-bearing-block-upright-lead","provider":"Tug and Tow","version":"1.0","type":"link"}