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Standard 10:1 Holding Power
Dyneema core, polyester covered line
with instructions on forming a becket
Super lightweight, no hard shackle
Load sensitive ratchet mechanism
Select by Sheave diameter:
40mm or 57mm
Availability date: 24-04-2017
Harken Ratchet Blocks help the crew to handle heavier loads, providing supreme handling for mainsheet and spinnaker systems on beachcats, dinghies and sportsboats.
Harken standard ratchamatic sheaves maintain a secure grip on the line by means of eight specially designed facets.
Facets are the angled concave shapes formed specifically to grip the line under load.
They act a bit like the pockets in a chain gypsy (although far less pronounced).
The faceted sheave allows a loaded sheet to be hand-held, yet still allow instant easing with control.
The crew can hand-hold main, jib, and spinnaker sheets with only a faction of the effort that a regular block requires.
Standard Holding Power - 10:1
Standard Holding Power sheaves are black anodised for identification:
Holding power varies according to sheave size and type.
40mm and 57 mm Ratchamatic blocks with eight-sided faceted sheaves can provide up to 10:1 holding power.
You can look at this in two different ways:
Harken Ratchamatic Block Design and Construction features:
Harken T2 Carbo Ratchamatic Plus Factors:
|Harken||Block||Holding Power||Break Load||Maximum Line Diameter||Weight||Harken|
|2159||40mm Carbo Ratchamatic - T2 Soft-attach||10:1||454kg||10mm||25g||2159|
|2160||57mm Carbo Ratchamatic - T2 Soft-attach||10:1||907kg||10mm||71g||2160|