{"product_id":"lewmar-72mm-synchro-block-single-black-7-16-inch-max-line-2420-lbs-safe-working-load","title":"Lewmar 72mm Synchro Block Single, Black - 7\/16 Inch Max Line, 2420 lbs Safe Working Load","description":"\u003cp\u003eThe Lewmar 72mm Synchro Block Single (part number 29927201BK) is a single-sheave sailboat block built to transfer power smoothly from deck to sail while minimizing rope wear. It uses a free-spin bearing and a self-aligning head, so the sheave rotates freely and stays true to the load angle even as line direction shifts during a maneuver, reducing friction and line abrasion over time. The block accepts line up to 7\/16 inch in diameter and carries a safe working load of 2420 pounds, making it suitable for control lines, sheets, and other running rigging that see real load.\u003c\/p\u003e\u003cp\u003eConstruction pairs a stainless steel strap for strength and long service life with stiff glass-fiber-reinforced cheeks that resist wedging of the line, keeping the sheave running cleanly under load. The block also features a tool-free sliding swivel locking mechanism, letting the block be positioned and locked onto a track or fitting without additional hardware. It is finished in black and supplied as a single block (one count) rather than a pair. Lewmar backs this block with a 3 year manufacturer warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Lewmar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 29927201BK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 72 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave\/Block Thickness:\u003c\/strong\u003e 72 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Line Size:\u003c\/strong\u003e 7\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe Working Load:\u003c\/strong\u003e 2420 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless steel strap with glass-fiber-reinforced cheeks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 (single block)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 year manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum line size for the Lewmar 72mm Synchro Block Single?\u003c\/strong\u003e The Lewmar 72mm Synchro Block Single (part 29927201BK) accepts line up to 7\/16 inch in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the safe working load of this block?\u003c\/strong\u003e 2420 pounds is the safe working load rating for the Lewmar 72mm Synchro Block Single, 29927201BK.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the block weigh?\u003c\/strong\u003e This single block weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color does this block come in?\u003c\/strong\u003e The 29927201BK is finished in black, as indicated by its part number suffix.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the cheeks made of?\u003c\/strong\u003e Stiff glass-fiber-reinforced cheeks are used on the Lewmar 72mm Synchro Block Single to prevent lines from wedging during use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this block include a locking mechanism?\u003c\/strong\u003e Yes, the Lewmar 72mm Synchro Block Single has a tool-free sliding swivel locking mechanism, so it can be positioned and locked without extra tools.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the sheave stay aligned under load?\u003c\/strong\u003e A free-spin bearing and self-aligning head let the sheave in this Lewmar block rotate freely and follow the load angle, which helps transfer power smoothly and reduce rope wear.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a single block or a double block?\u003c\/strong\u003e The 29927201BK is a single-sheave block, supplied as one unit (unit count of 1).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the outside diameter of the block?\u003c\/strong\u003e 72 millimeters is the outside diameter of the Lewmar Synchro Block, 29927201BK.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty does Lewmar provide on this block?\u003c\/strong\u003e A 3 year manufacturer warranty covers the Lewmar 72mm Synchro Block Single.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the block's strap made of?\u003c\/strong\u003e A stainless steel strap is used on the 29927201BK for improved strength and longer service life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this block typically used for?\u003c\/strong\u003e The Lewmar 72mm Synchro Block Single is used to transfer power from deck to sail on control lines and sheets, reducing rope wear while handling loads up to its 2420 pound rating.\u003c\/p\u003e","brand":"Lewmar","offers":[{"title":"Default Title","offer_id":49025132593371,"sku":"LEW-29927201BK","price":56.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/LEW-29925001BK__17650.1722385035.500.750.jpg?v=1785329118","url":"https:\/\/www.goodvibesmarina.com\/products\/lewmar-72mm-synchro-block-single-black-7-16-inch-max-line-2420-lbs-safe-working-load","provider":"Good Vibes Marina","version":"1.0","type":"link"}