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Harken, Inc.
Harken 57mm Triple Black Magic Aluminum Block with Swivel - 3219
Harken 57mm Triple Black Magic Aluminum Block with Swivel - 3219
57mm Swivel Triple Roller Bearing Pulley
SKU:H3219
MSRP
Regular price
$600.95 USD
Regular price
MSRP:$682.50 USD
Sale price
$600.95 USD
Unit price
/
per
Shipping calculated at checkout.
- Quantities are subject to availability. We will confirm stock before processing your order. If an item is unavailable, we may suggest a substitute or drop ship the product to you. You are welcome to cancel at no charge if substitution/drop shipping does not suit your needs.
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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 line from twisting. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
The Black Magic Double Pulley construction offers an optimal strength to weight ratio. Easy maintenance as the there is a one hex screw for disassembly. All bearings remain captive.
Sheave ⌀ : 2-1/4”
(57 mm)
Weight: 13.3 oz (78 g)
Max Line ⌀ : 7/16” (12 mm)
Max Working Load: 4850 lbs (2200 kgs)
Breaking Load: 9700 lbs (4400 kgs)
Shackle Pin ⌀ : 5/16” (8 mm)
Weight: 13.3 oz (78 g)
Max Line ⌀ : 7/16” (12 mm)
Max Working Load: 4850 lbs (2200 kgs)
Breaking Load: 9700 lbs (4400 kgs)
Shackle Pin ⌀ : 5/16” (8 mm)
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