ID
1299277
$ 2,186.48
1-2 weeks delivery time
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The Harken 520 Big Boat 178 mm ball bearing aluminum sheave supports lines up to 22 mm, made from hardcoat-anodized, PTFE-impregnated 6061-T6 aluminum with Torlon® rollers and Delrin® balls, capable of a maximum working load of 6349 kg.
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Harken 520 - 178mm Ball Bearing Aluminum Sheave Max 22mm Line
Big Boat sheaves are designed for specialized applications and as replacements in Big Boat blocks. Made from hardcoat-anodized, PTFE-impregnated 6061-T6 aluminum, these sheaves feature Torlon® rollers to handle high radial loads and carbon-black Delrin® balls to support sideloads while offering UV protection. Delrin® is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. Torlon® is a registered trademark of Solvay Advanced Polymers L.L.C.
- Sheave Ø: 178 mm (7 in)
- Width: 29 mm (1 1/8 in)
- Weight: 1280 g (45 oz)
- Maximum line Ø: 22 mm (7/8 in)
- Fasteners: 12 mm (1/2 in)
- Fastener circle: 64 mm (2 1/2 in)
- Maximum working load: 6349 kg (14000 lb)
- Breaking load: 12698 kg (28000 lb)
- Center pin Ø: 38 mm (1 1/2 in)
- Item number: HK520
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