Harken 57mm T2 Soft-Attach Ratchamatic Block

The Harken 57 mm T2 Soft-Attach Ratchamatic block delivers exceptional performance in a lightweight, race-grade package. With just 71 g weight in some versions, it features Harken’s patented load-sensing ratchet mechanism: rolls freely under low loads, then seamlessly locks into ratchet mode under heavier tension. Ideal for mainsheets, jib sheets, and other high-load control lines on performance yachts. The soft-attach array enables effortless installation and reduced hardware weight, making it a premium choice for serious sailors. Barton Marine NZ supplies this with local support and NZ-wide delivery. 

Features & Benefits 

• Automatic ratcheting: Rolls freely at light loads, ratchets under high load — ensuring smooth trim transitions and reliable control.  

• Ultralight construction: Carbo Air/Carbo style block with T2 branding and soft-attach system reduces weight and simplifies rig fitting. 

• 57 mm sheave size: Optimised for sheet diameters up to ~10 mm or 3/8″ — common for control lines on modern boats. 

• High working & breaking loads: Example specs: Working Load ~227 kg, Breaking Load ~907 kg for the 57 mm Carbo Ratchamatic. 

• Directional clarity & reliable ratcheting: Clearly labelled for correct reeving and trimming direction; ratchet engages quietly under load. 

• Versatile placement: Suitable for mainsheet car, traveller, jib sheet lead cars and other control lines where ratchet assistance and low-drag are valued.

• Premium marine long-term durability: Designed for saltwater use with corrosion-resistant materials and high-performance bearings.

Sheave Diameter: 57mm, Max line 10mm, Working Load 227kg, Breaking Load 907kg