57mm Carbo Air® Fiddle Ratchet Block with Becket and Cam

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Harken 57mm Carbo Air® Fiddle Ratchet Block with Becket and Cam-Lock locking system allows the shackle to lock at 90-degree’s. 

Carbo Ratchet fiddle 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 fiddle blocks are for dinghies and small keelboats.

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 vang systems on dinghies, sportsboats, and medium keelboats
  • Ratchet fiddle 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): 792 lb. (359 kg)   
  • Breaking Load: 2380 lb. (1080 kg)
  • Weight: 10.4 oz. (294 g)
  • Length: 4 5/8″ (118 mm)

Additional information

Sailboat Blocks

Fiddle Blocks

Ball Bearings Plastic
Becket No Becket
Diameter 3/16 Inch or 5 mm
Direction Any
Integral Cleat Integral Cam
Length 4 5/8 Inches
Mount Type Swivel Shackle
Ratchet Ratcheting
Safe Working Load 793 Pounds
Type Single Fiddle
Weight 10.4 Ounces
Sheave Diameter 57 mm
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