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Harken 57mm Swivel Carbo Ratchamatic® Cheek Block

$105.45 $92.99
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Harken 57mm Swivel Carbo Ratchamatic® Cheek Block

Harken's Carbo Ratchamatic® Blocks are load-sensing blocks that roll freely in both directions under low loads and automatically engage the ratchet as loads increase, making shifting between ratchet and light-air modes seamless. Unloaded main and jib sheets run out freely during mark roundings and asymmetrical spinnakers free instantly during jibes.

Ratchet engagement may be adjusted to a higher or lower load according to strength and sailing style.  The 57mm Ratchamatic® provides up to a 10:1 holding power.

The eight-faceted, hard lube-anodizing aluminum sheave holds line securely.  Mounts on either port or starboard.

Includes RH fasteners and mounting pad.



  Imperial Metric
Sheave Diameter 2 1/4 in 57 mm
Max Line Diameter 3/8 in 10 mm
Max Working Load 500 lb 227 kg
Breaking Load 2,000 lb 907 kg
Holding Power w/ 180° Wrap 10:1 10:1
Shackle Pin Diameter N/A N/A
Weight w/ Shackle 3.1 oz 89 g
Length 3 1/4 in 83 mm