Harken 57 mm Carbo Ratsch blocks

Color: black
Max. working load: 227 kp
Max. breaking load: 907 kp
Sheave Ø: 57 mm
Shackle pin Ø: 5 mm

Carbo ratchets allow sailors to hold a sheet under load by hand, ensuring the right balance of holding power and controlled easing. The nylon resin cheeks are reinforced with densely layered long glass fibers, resulting in a compact block with a high load-to-mass ratio. The machined sheaves are hard lube anodized to provide strength and corrosion protection. The eight chamfers keep the sheet secure. The free-running ball bearing, sheave, and cheeks are blackened for maximum protection.

These switchable ratchets can be precisely engaged and disengaged with easily accessible and operable switches on both sides of the block. For an optimal system, install a switchable ratchet in the cockpit and directly above it a Ratchamatic® on the boom to achieve double holding power in strong winds and a free-running sheet in light winds. The 75 mm has a holding power of up to 15:1, while the 57 mm has up to 10:1.

Usage: Main/jib/spinnaker sheet, fine trim, main sheet, traveler controls, genoa, downhaul, spinnaker pole, and lowering system.