Hand-hold your loaded lines and experience controlled releasing with Harkens 57mm Carbo Ratchet Blocks.
Their machined aluminum sheaves have eight facets to hold line securely with 10:1 advantage when the block is ratcheting. Recessed switch allows on/off control for the ratcheting mechanism.
These blocks are primarily used for main, jib and spinnaker sheets, traveler controls and foreguys. Sheave diameter is 2 1/4 in (57mm).
The load ratings for blocks with cams are based on the cams strength.
Note: For the ultimate mainsheet system, mount a switchable ratchet in the cockpit and a Ratchamatic on the boom to allow double holding power in heavy air and to ensure the mainsheet runs out freely in light air.
|Breaking Load (lbs)||2000|
|Breaking Load (kg)||907|
|Max Line Size (in)||3/8|
|Max Line Size (mm)||10|
|Note||Weight with Shackle|
|Safe Working Load (lbs)||500|
|Safe Working Load (kg)||227|
|Shackle Pin (in)||3/16|
|Shackle Pin (mm)||5|
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Drew looks into the features that make up the Harken 57mm Carbo Airblock Ratchet Block.
Whether it is a main sheet block for a dinghy, or a large block for a running backstay, we can usually find a ratchet block to fit our needs. Harken has designed the Carbo Airblocks to fill the need of a strong, lightweight, multi-purpose block. The 57mm Swivel Carbo Airblock Ratchet Block features an on/off switch for the ratchet than can be switched from either side of the block.
At the top of the block it has a lock on the shackle. You can either set it locked or unlocked to allow the block to swivel freely. This allows you to use the block in any situation you may need on the boat, showing its true diversity. The Carbo Airblock itself is made out of durable UV resistant material allowing for years of use. It allows the block to be lightweight, while having a high breaking strength, the 57mm block has a 792 lb breaking strength. The 57mm block can handle lines up to 3/8. The full line of Carbo Airblocks work in many different applications and come in ratchet and non-ratchet combinations. So if you are looking for a new block to use while hand holding those loaded sheets, the 57mm Carbo Airblock Ratchet by Harken is the block for you.