{"title":"55mm Blocks","description":null,"products":[{"product_id":"ubi-maior-rt-series-high-performance-titanium-single-blocks-copy","title":"Ubi Maior RT55 High Performance Titanium Single Blocks","description":"\u003cp class=\"text-dark\"\u003e\u003cspan\u003eThe RT EVE REGATA range has been developed to meet the demands of high performance racing boats. EVE blocks are the answer to the neverending quest for high load and low weight blocks required by the most demanding professional racing boats and crews.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"text-dark\"\u003e\u003cspan\u003e The materials used for the load-bearing components and the particular shell design minimize weight and dimensions while guaranteeing exceptional performance. In fact, the heart of the EVE block is composed of a hollow shaft, roller bearings and a sheave made of machined grade 5 Titanium alloy. Two sets of Torlon bearing keep the sheave aligned, absorb side loads and minimize friction while the shell is optimized to guarantee an optimum loadpath and minimal weight. A version with an extra wide pulley is available for off-axis line angles. Available in a variety of finishes and custom colors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"text-dark\"\u003e\u003cspan\u003eSpecification: \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"text-dark\"\u003e\u003cspan\u003eØ SHEAVE: 55mm\u003c\/span\u003e\u003cspan\u003eMAX Ø LINE: 12m\u003cbr\u003eMAX WORKING LOAD: 3000Kg\u003cbr\u003eBREAKING LOAD: 6000Kg\u003cbr\u003eLENGTH: 77mm\u003cbr\u003eWEIGHT: 123g\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDelivery 2-3 weeks\u003c\/p\u003e","brand":"Ubi Maior","offers":[{"title":"Default Title","offer_id":52937717416211,"sku":"RT055VW","price":10045.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7001\/5507\/files\/ubi_maior_high_performance_block.png?v=1752539200"},{"product_id":"ubi-maior-rt-ultra-block-single-55mm-120mm-copy","title":"Ubi Maior RT55U Ultra Block Single","description":"\u003cp\u003e\u003cspan\u003eDesigned for Racing Yachts, the RT REGATA range, builds on 30 years of evolution in this type of product. These blocks are able to withstand high loads while maintaining its low friction ability. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe RT ULTRA blocks are an evolution of the RT REGATA line,but its elements are lighter, smaller and can bear much higher loads thanks to textile attachments that are centralised in relation to the load. These blocks are the answer to the never ending quest for incredible resistance and lightness required by the most demanding professional racing boats and crews.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSHEAVE: 55mm\u003cbr\u003eMAX Ø LINE: 14mm\u003cbr\u003eMAX WORKING LOAD: 1800Kg\u003cbr\u003eBREAKING LOAD: 3600Kg\u003cbr\u003eLENGTH: 71mm\u003cbr\u003eWEIGHT: 93g\u003c\/p\u003e","brand":"Ubi Maior","offers":[{"title":"Default Title","offer_id":52938004070675,"sku":null,"price":2460.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7001\/5507\/files\/Screenshot2025-10-05at18.49.32.jpg?v=1759661486"},{"product_id":"ronstan-series-50-ball-bearing-orbit-block™-single-with-becket","title":"Ronstan Series 55 Ball Bearing Orbit Block™, Single with Becket","description":"\u003ch2 data-content-type=\"heading\" data-appearance=\"default\" data-element=\"main\"\u003eProduct Information\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLightweight\u003c\/strong\u003e\u003cbr\u003eKilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub. Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible. Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHighest working load in its class\u003c\/strong\u003e\u003cbr\u003e. The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range. The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point\u003c\/p\u003e\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003cdiv class=\"product-spec additional-attributes-wrapper table-wrapper\"\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003ctable class=\"data table additional-attributes\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"type_of_block\" scope=\"row\"\u003eType of Block\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"type_of_block\"\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"dia_sheave_mm\" scope=\"row\"\u003eSheave diameter (mm)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"dia_sheave_mm\"\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"load_bl_kg\" scope=\"row\"\u003eB.L. (kg)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"load_bl_kg\"\u003e1000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"load_mwl_kg\" scope=\"row\"\u003eM.W.L. (kg)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"load_mwl_kg\"\u003e500*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"dia_rope_max_mm\" scope=\"row\"\u003eMax. Rope diameter (mm)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"dia_rope_max_mm\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"weight_g\" scope=\"row\"\u003eWeight (g)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"weight_g\"\u003e88\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"dia_pin_mm\" scope=\"row\"\u003ePin Ø (mm)\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"dia_pin_mm\"\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"col label\" data-th=\"product_spec_note\" scope=\"row\"\u003eNotes:\u003c\/th\u003e\n\u003ctd class=\"col data\" data-td=\"product_spec_note\"\u003e*Load on becket not to exceed 50% of block load. Suitable for 2:1 system at rated block load.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":67833729810707,"sku":"RF55110","price":458.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7001\/5507\/files\/rf55110_jpg.webp?v=1793021397"}],"url":"https:\/\/rigginghk.com\/zh-hant\/collections\/55mm-blocks.oembed","provider":"Rigging HK","version":"1.0","type":"link"}