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Harken 57mm Triple Block — Swivel, Cam Cleat is a powerful, high-efficiency solution designed for demanding control systems where maximum purchase and secure line handling are essential. Combining a triple sheave block with an integrated cam cleat, this setup delivers smooth trimming with instant, reliable line locking.
Part of the proven Carbo Air range, this block offers exceptional strength and low-friction performance in a compact, lightweight design. The triple sheave configuration provides maximum mechanical advantage for high-load applications, while the swivel head ensures optimal alignment under changing loads, reducing friction and improving efficiency.
The integrated cam cleat allows for quick adjustment and secure holding without additional hardware, making this block ideal for mainsheet systems, vangs and advanced control setups on performance dinghies and small keelboats.
Specifications
Length: 121 mm / 4 3/4 in
Weight: 431 g / 15.2 oz
Sheave Diameter: 57 mm / 2 1/4 in
Maximum Line Diameter: 10 mm / 3/8 in
Maximum Working Load: 680 kg / 1500 lb
Breaking Load: 1700 kg / 3750 lb
Shackle Pin Diameter: 6 mm / 1/4 in
Key Features
- Triple sheave design for maximum mechanical advantage
- Integrated cam cleat for quick, secure line holding
- Low-friction Carbo Air construction for smooth, efficient performance
- Swivel head for optimal alignment under load
- High working load capacity for demanding control systems
- Lightweight yet strong construction for performance sailing
- Compact, all-in-one design reduces the need for additional hardware
- Ideal for mainsheets, vangs and high-load control lines
- Suitable for dinghies and small keelboats
- Reliable performance for racing and active sailing use
