The Harken 57 mm Carbo Ratchamatic® Block with Swivel is engineered for sailors seeking precise control and reliability in demanding marine conditions. This block offers a seamless transition between free-running and ratchet modes, adapting to varying load conditions without manual adjustments.
- Load-Sensing Mechanism: Automatically engages the ratchet as loads increase, providing consistent holding power.
- Swivel Design: Allows for easy attachment and smooth operation, reducing line wear and enhancing performance.
- Versatile Holding Power: Available with 1.5x grip (15:1 holding power) and 2x grip (20:1 holding power) options to suit different wind and sea conditions.
Technical Specifications
- Sheave Diameter: 57 mm (2-1/4 inches)
- Length: 103 mm (4-1/16 inches)
- Weight: 104 g (3.7 oz)
- Maximum Line Diameter: 10 mm (3/8 inches)
- Maximum Working Load: 227 kg (500 lbs)
- Breaking Load: 907 kg (2,000 lbs)
- Holding Power: 10:1, 15:1, or 20:1, depending on the model.
Materials
- Sheave: Aluminum, hardcoat-anodized for durability
- Sideplates: Composite fiber-reinforced for strength and reduced weight
- Swivel and Shackle: Stainless steel for corrosion resistance
Compatibility Information
Designed for use with lines up to 10 mm (3/8 inches) in diameter, making it suitable for mainsheet and spinnaker systems on beachcats, dinghies, and sportboats.
