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57mm Aluminum Low Load Black Magic Block with Swivel
Black 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.
Specifications:
Sheave: 57mm/2-1/4in
Length: 119mm/4-11/16in
Weight: 154g/5.44oz
Shackle Pin: 6mm/1/4in
Maximum Line: 12mm / 7/16in
Maximum Working Load: 7/16kg / 1655lbs
Breaking Load: 1500kg / 3300lb
Harken 3226 57mm Aluminum Low-Load Black Magic Swivel Block 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.
The 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.
Key Features
Feature: Lightweight aluminum construction — Helps provide a practical balance of strength and reduced weight for sail-control systems.
Feature: Torlon roller bearings — Center-caged rollers stay separated and parallel to help reduce friction.
Feature: Swivel and locking shackle function — Allows the block to swivel or lock in two directions for flexible installation and line alignment.
Feature: 316 stainless steel shackle — Provides a robust connection for marine rigging use.
Feature: Low-load design with red isolators — Identifies this block for low-load applications.
Product Details
Brand: Harken
Part number: 3226
Block type: 57mm aluminum low-load Black Magic block with swivel
Sheave: 2-1/4 inches
Overall length: 4-11/16 inches
Weight: 5.44 ounces
Shackle pin: 1/4 inch
Maximum line size: 7/16 inch
Maximum working load: 1,655 pounds
Breaking load: 3,300 pounds
Bearing material: Torlon roller bearings
Shackle material: 316 stainless steel
Intended applications: Mainsheet, runner, halyard, and spinnaker systems
Choose the Harken 3226 Black Magic swivel block for lightweight, low-friction performance in active marine sail-control applications.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
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Shop the Harken 3226 57mm aluminum low-load swivel block with Torlon bearings for smooth line handling in mainsheet, halyard, and spinnaker systems.
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