{"product_id":"harken-3226-57mm-aluminum-low-load-black-magic-swivel-block","title":"Harken 3226 57mm Aluminum Low-Load Black Magic Swivel Block","description":"\u003cp\u003e\u003cstrong\u003e57mm Aluminum Low Load Black Magic Block with Swivel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBlack Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep the line from twisting. Low-load blocks have red isolators. They use Torlon rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless head posts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 57mm\/2-1\/4in\u003c\/li\u003e\n\u003cli\u003eLength: 119mm\/4-11\/16in\u003c\/li\u003e\n\u003cli\u003eWeight: 154g\/5.44oz\u003c\/li\u003e\n\u003cli\u003eShackle Pin: 6mm\/1\/4in\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 12mm \/ 7\/16in\u003c\/li\u003e\n\u003cli\u003eMaximum Working Load: 7\/16kg \/ 1655lbs\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1500kg \/ 3300lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 3226 57mm Aluminum Low-Load Black Magic Swivel Block\u003c\/strong\u003e is designed for sailors who need smooth, dependable line handling in active sail-control systems. Built for big-boat performance racing and cruising, this lightweight block is well suited for mainsheet, runner, halyard, and spinnaker applications where reduced friction and reliable movement matter.\u003c\/p\u003e\u003cp\u003eThe Harken Black Magic Air block uses Torlon roller bearings held in parallel by a center cage to help reduce friction during operation. Its swivel configuration allows the block to align with changing line direction, helping limit line twisting. The shackle can lock in two directions or swivel as needed, while the aluminum construction and 316 stainless steel shackle provide a durable solution for demanding marine rigging applications. As a low-load model, it features red isolators.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Lightweight aluminum construction\u003c\/strong\u003e — Helps provide a practical balance of strength and reduced weight for sail-control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Torlon roller bearings\u003c\/strong\u003e — Center-caged rollers stay separated and parallel to help reduce friction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Swivel and locking shackle function\u003c\/strong\u003e — Allows the block to swivel or lock in two directions for flexible installation and line alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: 316 stainless steel shackle\u003c\/strong\u003e — Provides a robust connection for marine rigging use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Low-load design with red isolators\u003c\/strong\u003e — Identifies this block for low-load applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 3226\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock type:\u003c\/strong\u003e 57mm aluminum low-load Black Magic block with swivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave:\u003c\/strong\u003e 2-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 4-11\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.44 ounces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShackle pin:\u003c\/strong\u003e 1\/4 inch\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\u003eMaximum working load:\u003c\/strong\u003e 1,655 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 3,300 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing material:\u003c\/strong\u003e Torlon roller bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShackle material:\u003c\/strong\u003e 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended applications:\u003c\/strong\u003e Mainsheet, runner, halyard, and spinnaker systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 3226 Black Magic swivel block for lightweight, low-friction performance in active marine sail-control applications.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eTorlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eSEO Meta Description\u003c\/h3\u003e\u003cp\u003eShop the Harken 3226 57mm aluminum low-load swivel block with Torlon bearings for smooth line handling in mainsheet, halyard, and spinnaker systems.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937011265625,"sku":"93959","price":211.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/93959XL.jpg?v=1789835574","url":"https:\/\/www.marinepartsonly.com\/products\/harken-3226-57mm-aluminum-low-load-black-magic-swivel-block","provider":"Marine Parts Only","version":"1.0","type":"link"}