Harken 2625 57mm Carbo Ratchamatic Block - Red - Swivel

Harken 57mm Ratchamatic® Block — Swivel, Red Sheave is a high-performance, load-sensing ratchet block designed to deliver effortless trimming across a wide range of conditions. Featuring Harken’s innovative Ratchamatic® technology, this block automatically switches between free-running and ratchet modes depending on load.

Under low loads, the block rolls freely in both directions for minimal friction and easy trimming. As loads increase, the ratchet engages automatically, providing additional holding power without manual adjustment. This seamless transition makes it ideal for both light-air sailing and high-load situations.

The swivel head ensures optimal alignment under changing loads, while the lightweight Carbo construction delivers strength and durability without unnecessary weight. Perfect for mainsheets, jib sheets and control lines on dinghies, sportboats and small keelboats.

Specifications

Length: 103 mm / 4 1/16 in

Weight: 104 g / 3.7 oz

Sheave Diameter: 57 mm / 2 1/4 in

Maximum Line Diameter: 10 mm / 3/8 in

Maximum Working Load: 227 kg / 500 lb

Breaking Load: 907 kg / 2000 lb

Holding Power: 10:1

Shackle Pin Diameter: 5 mm / 3/16 in

Key Features

• Ratchamatic® load-sensing technology for automatic engagement
• Free-running under low loads, ratchet engages as load increases
• Smooth, seamless transition between modes
• 10:1 holding power for improved control under load
• Swivel head for optimal alignment in dynamic systems
• Lightweight Carbo construction for strength and durability
• Low-friction performance for efficient trimming
• Ideal for mainsheets, jib sheets and control lines
• Suitable for dinghies, sportboats and small keelboats
• Reliable performance for racing and performance sailing