Block 40mm Ratchet Single Swivel+Shackle+Cleat 423 Carbo-Cam Harken Carbo
Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing.
Harken Ratchamatic®, Carbo Ratchet, and Hexaratchet® blocks are lightweight, strong, and run exclusively on ball bearings for fast trimming under any load.
What are Harken ratchet blocks?
Harken ratchet blocks hold part of the sheet’s load, let you trim and ease with complete control, and enable higher trimming speeds. Ratchets make it much easier to hand-hold higher loads by only allowing the sheave to turn in the trimming direction. When you are holding or releasing the load, the faceted sheave grips the line to reduce fatigue and give you more control. Also, ratchets make faster trimming possible because you don’t have to hold the full force of the sheet while shifting your grip.
Options include ratchet blocks with beckets, adjustable cams, multiple sheaves, adjustable automatic load-sensing mechanisms, and footblock and fiddle configurations. Harken offers ratchet blocks in sizes between 40 and 75 mm (1 9/16"–3").
Where should I use ratchet blocks?
Ratchet blocks are great for any system that is normally adjusted by hand, including mainsheets, jib sheets, spinnakers, vangs, and backstays on everything from dinghies to large keelboats. In addition to increasing the loads you can manage without a winch, they reduce shock loading on your hands and your equipment—for example, a ratchet block can stop an unanticipated gust from yanking the line through your hands or from putting too much load on your cam cleats. Some dinghies and sportboats even use two Ratchamatic blocks in series for turns less than 90 degrees per ratchet block.