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.
|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|