{"product_id":"50-mm-roller-bearing-block-single-stand-up","title":"50 mm Roller Bearing Block - Single, Stand-Up","description":"\u003cp\u003eRBB50 -  Single Stand-up\u003c\/p\u003e\u003cp\u003eA rubber stand-up supports the block making it ideal for German sheeting, spinnaker sheets and runners.\u003c\/p\u003e\u003cp\u003eFeaturing a 50 mm sheave, the RBB50 is a compact, high-performance block designed for demanding, dynamic applications such as spinnaker and gennaker sheets, barber haulers, self-tacking jibs, and other high-load control lines.\u003c\/p\u003e\u003cp\u003eThe RBB50 features machined, black anodized aluminium cheeks, Acetal ball bearings that absorb axial (side) loads, and Acetal roller bearings optimized for radial loads. This combination delivers smooth operation, high efficiency, and outstanding durability under load.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eBlockType\u003c\/b\u003e: fixeD \u003cem\u003e\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 1500 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 750 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eSystem\u003c\/b\u003e: RBB50 \u003cem\u003e\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 10 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMounting\u003c\/b\u003e: 4x M5 \u003cem\u003e\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Mast LTD","offers":[{"title":"Default Title","offer_id":54500333879637,"sku":"405-201-35R","price":192.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/9823\/8293\/files\/index_1b0da2ce-92a0-46f9-aa0c-8d20394e58bb.jpg?v=1785417677","url":"https:\/\/shop-uk.seldenmast.com\/products\/50-mm-roller-bearing-block-single-stand-up","provider":"Selden Mast Ltd","version":"1.0","type":"link"}