Harken Single Swivel Carbo Ratchets

On / Off switch

Single ball bearing faceted sheave

Compact, robust construction

High strength to weight ratio

With or without becket

Select by sheave diameter:
40mm, 57mm or 75mm

£ 64.90 inc VAT

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Harken Carbo Ratchets allow sailors to hand-hold lines under load and offer balance between holding power and controlled easing.

Harken Carbo Facts and Features:

  • Available with or without becket and in 3 sheave diameters - 40mm, 57mm and 75mm
  • Nylon resin sideplates are densely packed with long-glass fibres for a compact block with a high strength to weight ratio
  • Machined aluminium sheaves are hardcoat anodised for strength and corrosion resistance
  • Eight facets (shaped sections) on the sheave hold the line securely
  • Ball bearings, sheaves, and sideplates are UV stabilised wih carbon black for maximum protection
  • On / Off switch ergonomically operable from both sides
  • Ideal for main/jib/spinnaker sheets, mainsheet fine-tune, traveller controls, genoa leads and foreguys.

For the ultimate system mount a switchable ratchet in the cockpit and a boom-mounted Ratchamatic® directly above to allow double holding power in heavy air and to ensure the mainsheet runs freely in light air.

HarkenBlockMaximum Break LoadSafe Working LoadMaximum Line DiameterWeight
260840mm Single Swivel454kg136kg10mm49grams
213557mm Single Swivel907kg227kg10mm85grams
267075mm Single Swivel1361kg341kg12mm227grams
260940mm Single Swivel Becket454kg136kg10mm52grams
213657mm Single Swivel Becket907kg227kg10mm94grams
267175mm Single Swivel Becket1361kg341kg12mm248grams

A becket is the starting point for the line in a purchase system, but it is also extremely useful for holding blocks up and off the deck with the addition of a short length of shock cord (bungee elastic) attached from the becket to e.g. the lower rail/guard wire.

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