75mm Carbo Ratchamatic Single Block with Becket and Cam

Model # 6840656 Mfg # 2684
5 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
75mm Carbo Ratchamatic Single Block with Becket and Cam
Model # 6840656 Mfg # 2684
5 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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Harken 75mm Carbo Ratchamatic Block with Cam arms can be locked in more than five positions for fair leads.

Carbo Ratchet 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 75mm blocks are for jibsheets and spinnakers on larger 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 spinnaker sheet systems on dinghies, sportsboats, and larger 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 15/16" (75 mm)
  • Max. Line Diameter: 7/16" (12 mm) 
  • Max. Working Load (MWL): 600 lb. (272 kg)   
  • Breaking Load: 1500 lb. (680 kg)
  • Weight: 15.5 oz. (440 g)
  • Length: 6 1/2" (165 mm)

Ball Bearings Plastic
Becket Becket
Diameter 7/16 Inch or 11 mm
Direction Any
Integral Cleat Integral Cam
Length 6 1/2 Inches
Mount Type Swivel Shackle
Ratchet Ratcheting
Safe Working Load 600 Pounds
Type Single
Weight 15.5 Ounces
Sheave Diameter 75 mm

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