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Harken Carbo Ratchamatic Blocks: 57 mmHarken
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HAR2625 - Harken 57 mm Carbo Ratchamatic/ Block
Code: HAR2625
Original Price: $102.70
Price: $81.35
HAR2626 - Harken 57 mm Carbo Ratchamatic? Block w/ Becket
Code: HAR2626
Original Price: $108.10
Price: $85.62
HAR2627 - Harken 57 mm Carbo Ratchamatic Block w/ Cam
Code: HAR2627
Original Price: $189.25
Price: $149.90
HAR2628 - Harken 57 mm Carbo Ratchamatic? Block w/ Cam, Becket
Code: HAR2628
Original Price: $194.65
Price: $154.20
HAR2629 - Harken 57 mm Carbo Triple Ratchamatic? Block w/ Cam
Code: HAR2629
Original Price: $293.45
Price: $232.50
HAR2630 - Harken 57 mm Triple Carbo Ratchamatic? Block w/ Cam, Becket
Code: HAR2630
Original Price: $298.85
Price: $236.70
HAR2632 - Harken 57 mm Carbo Triple w/ Ratchamatic?, Cam & 40 mm Block
Code: HAR2632
Original Price: $355.05
Price: $282.00
HAR2633 - Harken 57 mm Carbo Ratchamatic? Cheek Block
Code: HAR2633
Original Price: $105.45
Price: $83.52
HAR2634 - Harken 57 mm Carbo Double Ratchamatic? Block
Code: HAR2634
Original Price: $274.75
Price: $217.70


The Harken 57 mm Carbo Ratchamatic is a load-sending ratchet block that rolls freeling 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 Harken 57 mm Carbo Ratchamatic is as high as 10:1.

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 HAR2634 with a HAR402 or HAR403 swivel arm for a versatile two-speed mainsheet system.

Use For:
Main/Jib sheets
Asymmetric spinnakers


Harken Carbo Ratchamatic Blocks: 57 mm


We at Layline strive to be your source for Harken Carbo Ratchamatic Blocks: 57 mm and all sailboat hardware, rigging, and sailing gear. With our focus on one design and handicap racing we can offer advice and reviews of what you need to compete. If you need any assistance selecting the appropriate Harken Carbo Ratchamatic Blocks: 57 mm please contact us. Our crew is ready to help!
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