Harken 3218 57mm Double Black Magic High-Load Swivel Block With Becket
HARKEN 3218
Double Black Magic® AirBlock® with Becket - 57mm NEW!
The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.
Used on offshore boats, these strong, lightweight blocks feature high-load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum side plates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Like all Black Magic® AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench.
Standard blocks have 17-4 PH stainless head posts. Low-load blocks use Torlon® rollers and 316 stainless steel shackles.
Use for:
Specifications:
Double Black Magic® AirBlock® with Becket - 57mm NEW!
The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.
Used on offshore boats, these strong, lightweight blocks feature high-load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum side plates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Like all Black Magic® AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench.
Standard blocks have 17-4 PH stainless head posts. Low-load blocks use Torlon® rollers and 316 stainless steel shackles.
Use for:
- Sheets
- Halyards
- Running backstays
- Control lines
Specifications:
- Sheave Diameter - 57mm (2-1/4")
- Max Line Diameter - 7/16" (12mm)
| Mfg No. | Description | Length | Shackle Pin Diameter |
Max Working Load |
Breaking Load |
Weight |
| 3218 | Double / swivel w/ becket |
6" (152mm) |
5/16" (8mm) |
3600 Lbs (1633kg) |
7200 Lbs (3261kg) |
12.43 oz. (352g) |
Harken 3218 57mm Double Black Magic High-Load Swivel Block With Becket
Sale price$470.95
Regular price$535.00
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Harken 3218 57mm Double Black Magic High-Load Swivel Block With Becket
Sale price$470.95
Regular price$535.00