HARKEN
57mm Carbo Ratchet Block

$65.99

In stock online.
Model # 6840557 | Mfg # 2135 | UPC # 97653144267
HARKEN
57mm Carbo Ratchet Block

$65.99

3.7 Stars

Harken 57mm Carbo Ratchet Block with eight facet sheaves for a 10:1 purchase advantage. 

Carbo Ratchets blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Lightweight Carbo Ratchets are available in 40mm, 57mm and 75mm sizes. All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side. The 40mm cam-arm versions work in ratchet mode only. Commonly 57mm carbo ratchet blocks are for jibsheets and spinnakers on medium dinghies.  

The 40mm, 57mm and 75mm Carbo Ratchamatic® is adjustable for many applications and weather conditions. The load-sensing ratchet block rolls freely in both directions under low loads, then engages the ratchet automatically as loads increase. With 180 degree wrap, you get a 10:1 holding power. 

Key Features

  • Hand-hold your loaded lines
  • Use for spinnaker sheet systems on dinghies, sportsboats, and medium keelboats
  • Ratchet blocks are hand and crew savers
  • Allows a line to be eased instantly with control 
  • On/Off switch allows the ratchet to be turned off in light air 
  • Hardkote-anodized aluminum sheaves
  • Stainless steel swivel shackle
  • Sheave Diameter: 2 1/4" (57 mm)
  • Max. Line Diameter: 3/8" (10 mm) 
  • Max. Working Load (MWL): 500 lb. (227 kg)   
  • Breaking Load: 2000 lb. (907 kg)
  • Weight: 3 oz. (85 g)
  • Length: 4 1/16" (103 mm)

Specs

57mm Carbo Ratchet Block

Name Value
Ball Bearings Plastic
Becket No Becket
Diameter 3/8 Inch or 10 mm
Direction Any
Integral Cleat No Integral Cleat
Length 4 1/16 Inches
Mount Type Swivel Shackle
Ratchet Ratcheting
Safe Working Load 500 Pounds
Sheave Diameter 57 mm
Type Single
Weight 3 Ounces

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