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Harken Carbo Ratchamatic Blocks

Harken Blocks

Harken 57mm and 75mm Carbo Ratchamatic

The Carbo Ratchamatic® is a load-sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is 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 Ratchamatic® cheek block mounts on either port or starboard. The holding power of the 57 mm is as high as 10:1. The 75 mm is up to 15:1. For the ultimate system, mount a Ratchamatic® on the boom above a cockpit-mounted switchable ratchet to allow the mainsheet to run freely in light air and to double holding power in heavy air.

Use the 2634 with a 402 or 403 swivel arm for a versatile two-speed mainsheet system.

Use for:

  • Main/Jib Sheets

  • Asymmetric spinnakers

Part No. Description (Click for more information) Price Buy Now
har2625 Harken 57mm Carbo Ratchamatic $90.99 Add to cart
har2626 Harken 57mm Carbo Ratchamatic w/Becket $94.99 Add to cart
har2627 Harken 57mm Carbo Ratchamatic w/Cam Cleat $166.99 Add to cart
har2628 Harken 57mm Carbo Ratchamatic w/Cam & Becket $170.99 Add to cart
har2629 Harken 57mm Triple Carbo Ratchamatic w/Cam Cleat $257.99 Add to cart
har2630 Harken 57mm Triple Carbo Ratchamatic w/Cam & Becket $262.99 Add to cart
har2680 Harken 75mm Carbo Ratchamatic Block $126.99 Add to cart
har2681 Harken 75mm Carbo Ratchamatic Block w/Becket $137.99 Add to cart
har2682 Harken 75mm Carbo Ratchamatic Cheek Block $127.99 Add to cart
har2683 Harken 75mm Carbo Ratchamatic w/Cam Cleat $236.99 Add to cart
har2684 Harken 75mm Carbo Ratchamatic w/Cam & Becket $247.99 Add to cart
har2685 Harken 75mm Triple Carbo Ratchamatic Block w/Cam Cleat $365.99 Add to cart
har2686 Harken 75mm Triple Carbo Ratchamatic Block w/Cam & Becket $375.99 Add to cart
har2687 Harken 75mm Triple Carbo Ratchamatic w/Cam, Becket & 57mm Block $424.99 Add to cart

Specifications

Part No. Sheave dia. (in) Length (in) Weight w/shackle (oz) Shackle pin dia. (in) Max. line dia. (in) SWL (lb) Breaking strength (lb)
2625 2 1/4 4 1/16 3.7 3/16 3/8 500 2000
2626 2 1/4 4 15/16 4 3/16 3/8 500 2000
2627 2 1/4 4 1/16 9.4 3/16 3/8 300 750
2628 2 1/4 4 15/16 9.7 3/16 3/8 600 1500
2629 2 1/4 4 1/16 14.9 - 3/8 1500 3750
2630 2 1/4 4 15/16 15.2 - 3/8 1800 4500
2680 2 15/16   8.4   7/16 750 3000
2681 2 15/16   9.0   7/16 750 3000
2682 2 15/16   6.5   7/16 750 3000
2684 2 15/16   15.5   7/16 600 1500
2685 2 15/16   31 5/16 7/16 1500 3750
2686 2 15/16   31.6 5/16 7/16 1800 4500
2687 2 15/16   34.7 5/16 7/16 1800 4500
 

 


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