Description

The Harken Carbo Air 57mm Fiddle Block with Swivel (2621) is a lightweight, high-strength marine pulley designed for smooth and efficient rope handling in sailing and boat rigging systems.

Featuring a 57mm upper sheave and a smaller lower sheave in a compact fiddle configuration, this block provides an efficient solution for multi-part purchase systems. Its high-load ball bearings and low-friction design make sail trimming easier while maintaining excellent strength and reliability.

The swivel attachment features Harken’s Cam-Lock system, allowing the shackle to lock into position at 90-degree intervals or rotate freely to help prevent rope twisting.

Key Features & Benefits

• Fiddle Block Configuration: Two vertically arranged sheaves provide efficient rope routing for purchase systems.
• 57mm Carbo Air Design: Combines lightweight construction with impressive strength.
• Swivel Attachment: Allows the block to rotate freely or lock into different positions.
• High-Load Ball Bearings: Deliver smooth, low-friction sheave rotation.
• UV-Stabilized Components: Designed to withstand prolonged exposure to sunlight.
• Glass-Fibre-Reinforced Construction: Provides an excellent strength-to-weight ratio.
• Cam-Lock System: Allows the shackle to lock at 90-degree intervals or swivel freely.
• Open Air Design: Eliminates unnecessary material to reduce weight while maintaining strength.

Technical Specifications

• Brand: Harken
• Product: Carbo Air Fiddle Block with Swivel
• Manufacturer Part Number: 2621
• Sheave Diameter: 57mm (2 1/4 inches)
• Overall Length: 153mm (6 inches)
• Weight: 105g (3.7oz)
• Maximum Line Diameter: 10mm (3/8 inch)
• Shackle Pin Diameter: 5mm (3/16 inch)
• Maximum Working Load: 359kg (792lb)
• Breaking Load: 1,079kg (2,380lb)
• Configuration: Fiddle block with swivel
• Construction: Long-strand glass-fibre-reinforced engineered nylon
• Bearing Type: High-load ball bearings