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HARKEN 57mm Carbo Ratchamatic Blocks

Control loaded lines with ease

The 57mm Carbo Ratchamatic blocks are adjustable for use in many applications and weather conditions. This 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. Great for asymmetrical spinnakers when you need tough holding power and a quick release.

 

  • Sheave: Hardkote anodized eight-sided aluminum
  • Sheave Size: 2 1/4" (57mm)
  • Ball Bearings: Engineered plastic in fitted ball races
  • Line Diameter: 3/8"
  • Cheek Material/Finish: Long-glass reinforced engineered nylon
  • Shackle/Strap Type: Stainless swivel shackle
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
57mm Carbo Ratchamatic Block, Flip-Flop, 500lb. SWL, 5.5oz. 9485723 2144
In stock online.

$187.09

57mm Carbo Ratchamatic Block, Flip-Flop with Cam, 300lb. SWL, 12.0oz. 9485731 2145
Delivery within 2 - 3 weeks.

$260.70

57mm Carbo Ratchamatic Block, 500lb. SWL, 3.7oz. 2640043 2625
In stock online.

$90.38

57mm Carbo Ratchamatic Block with Becket, 500lb. SWL, 4.0oz. 2640142 2626
In stock online.

$95.13

57mm Carbo Ratchamatic Block with Cam, 300lb. SWL, 9.4oz. 6580369 2627
In stock online.

$166.54

57mm Carbo Ratchamatic Block with Becket & Cam, 600lb. SWL, 9.7oz. 3771250 2628
In stock online.

$171.29

57mm Carbo Ratchamatic Block, Triple with Cam, 1,500lb. SWL, 14.9oz. 2640175 2629
Delivery within 2 - 3 weeks.

$258.24

57mm Carbo Ratchamatic Block, Cheek, 500lb. SWL, 3.1oz. 3732500 2633
In stock online.

$92.80

57mm Carbo Ratchamatic Block, Double, 750lb. SWL, 7.2oz. 10616449 2634
In stock online.

$241.78

Product Description

Control loaded lines with ease

The 57mm Carbo Ratchamatic blocks are adjustable for use in many applications and weather conditions. This 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. Great for asymmetrical spinnakers when you need tough holding power and a quick release.

 

  • Sheave: Hardkote anodized eight-sided aluminum
  • Sheave Size: 2 1/4" (57mm)
  • Ball Bearings: Engineered plastic in fitted ball races
  • Line Diameter: 3/8"
  • Cheek Material/Finish: Long-glass reinforced engineered nylon
  • Shackle/Strap Type: Stainless swivel shackle

Specs

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