Harken 3215 57mm Single Black Magic High-Load Airblock Swivel Block
HARKEN 3215
Single Black Magic® AirBlock® - 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:
Single Black Magic® AirBlock® - 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 |
3215 | Single / swivel |
4-11/16" (119mm) |
1/4" (6mm) |
2500 Lbs (1134kg) |
5000 Lbs (2268kg) |
5.36 oz. (152g) |
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Harken 3215 57mm Single Black Magic High-Load Airblock Swivel Block
Sale price$224.95
Regular price$255.00