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Weymouth Sail Sports
National Sailing Academy
Portland, Dorset

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Harken - Cheek 57mm Carbo Ratchamatic (HK2633)

Our price £82.82

ITEM OUT OF STOCK - For more information or to order this item please give our customer services department a call on 07929 306 132 and we will try and help you.

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Lead time estimated 2 working days
No dimensions available
No assembly required

Harken - Cheek 57mm Carbo Ratchamatic (HK2633)

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.

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 for:
Main/Jib Sheets
Asymmetric spinnakers

Sheave Ø (mm)57 mm
Length (mm)83 mm
Weight (g)89 g
Maximum line Ø (mm)10 mm
Fasteners (mm)M4 mm
Maximum working load (kg)227 kg
Breaking load (kg)907 kg
Holding power w/180 degree wrap 50 lb (23 kg)10:1 
Footnote: Includes fasteners and mounting pad.

Weymouth Sail Sports is a leading supplier of Harken - Cheek 57mm Carbo Ratchamatic (HK2633) based at the UK National Sailing Academy Portland Harbour Dorset. Our store and our UK online chandlery can supply you with Harken - Cheek 57mm Carbo Ratchamatic (HK2633) quickly and reliably 24 hours a day (online). When it comes to paying for your Harken - Cheek 57mm Carbo Ratchamatic (HK2633) we use UK banks and do not store card information for your security. Need more information on Harken - Cheek 57mm Carbo Ratchamatic (HK2633)? Just give us a call and quote product ID 4887643.