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HARKEN 57mm Carbo AirBlocksĀ®

From the folks who invented ball-bearing blocks, this line of blocks boasts an excellent strength-to-weight ratio. The plastic in their sideplates, sheaves and balls makes them 30% lighter, 60% stronger and generally less expensive than equivalent conventional blocks.

The 57mm blocks have an enormous working range that makes them ideal for main and jib sheets, spinnaker halyards and control lines. This range handles loads similar to Harken’s 3" standard blocks. Recipient of both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation

  • Sheave: Long-glass reinforced engineered nylon
  • Ball Bearings: Engineered plastic in fitted ball races
  • Sheave Size: 2-1/4" (57mm)
  • Line Diameter: 7/16" (57mm)
  • 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 Sheave Diameter Flip-Flop Block, 500lb. MWL 10421972 2142
Ships when available.

$153.03

57mm Sheave Diameter Block, Flip-Flop with Cam, 500lb. MWL 10421980 2143
In stock online.

$226.73

57mm Sheave Diameter Block, Single/Swivel Style, 792lb. SWL 200027 2600
In stock online.

$40.30

57mm Sheave Diameter Block, Single/Swivel/Becket Style, 792lb. SWL 200043 2601
In stock online.

$45.06

57mm Sheave Diameter Block, Double/Swivel Style, 1,584lb. SWL 200050 2602
In stock online.

$85.71

57mm Sheave Diameter Block, Double/Becket Style, 1,584lb. SWL 200068 2603
In stock online.

$90.46

57mm Sheave Diameter Block, Triple/Swivel Style, 1,584lb. SWL 200076 2604
In stock online.

$123.07

57mm Sheave Diameter Block, Triple/Swivel/Becket Style, 2,380lb. SWL 200084 2605
In stock online.

$127.82

57mm Sheave Diameter Block, Cheek Style, 792lb. SWL 200092 2606
In stock online.

$37.05

57mm Sheave Diameter Block, Single/Swivel/Cam Style, 300lb. SWL 1171800 2615
In stock online.

$114.27

57mm Sheave Diameter Block, Single/Swivel/Becket/Cam Style, 600lb. SWL 1171768 2616
In stock online.

$119.02

57mm Sheave Diameter Block, Triple/Swivel/Cam Style, 1,500lb. SWL 1171685 2617
In stock online.

$184.80

57mm Sheave Diameter Block, Triple/Swivel/Becket/Cam Style, 1,800lb. SWL 1171644 2618
In stock online.

$189.55

57mm Sheave Diameter Block, Fiddle Style, 792lb. SWL 2042422 2621
In stock online.

$48.40

57mm Sheave Diameter Block, Fiddle/Becket Style, 792lb. SWL 2042455 2622
In stock online.

$53.15

57mm Sheave Diameter Block, Fiddle/Cam Style, 792lb. SWL 2042463 2623
In stock online.

$124.65

57mm Sheave Diameter Block, Fiddle/Becket/Cam Style, 792lb. SWL 2042208 2624
In stock online.

$129.40

57mm Sheave Diameter Block, Quadruple, 2,380lb. SWL 6580229 2631
Delivery within 2 - 3 weeks.

$154.04

57mm Sheave Diameter Block, Fiddle/Becket Style, 793lb. SWL 11871092 2673
In stock online.

$80.34

57mm Sheave Diameter Block, Fiddle/Ratchet/Becket Style, 793lb. SWL 11871100 2674
Delivery within 2 - 3 weeks.

$85.10

57mm Sheave Diameter Block, Fiddle/Ratchet/Cam Style, 793lb. SWL 11871118 2675
In stock online.

$154.62

Product Description

From the folks who invented ball-bearing blocks, this line of blocks boasts an excellent strength-to-weight ratio. The plastic in their sideplates, sheaves and balls makes them 30% lighter, 60% stronger and generally less expensive than equivalent conventional blocks.

The 57mm blocks have an enormous working range that makes them ideal for main and jib sheets, spinnaker halyards and control lines. This range handles loads similar to Harken’s 3" standard blocks. Recipient of both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation

  • Sheave: Long-glass reinforced engineered nylon
  • Ball Bearings: Engineered plastic in fitted ball races
  • Sheave Size: 2-1/4" (57mm)
  • Line Diameter: 7/16" (57mm)
  • Cheek Material/Finish: Long-glass reinforced engineered nylon
  • Shackle Strap Type: Stainless swivel shackle

Specs

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REVIEW SNAPSHOT®

by PowerReviews
Harken 57mm Sheave Diameter Block, Double/swivel Style, 1,584lb. Swl
 
4.8

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

      • Sailing (4)
        • Reviewer Profile:
        • Advanced (3)

      Reviewed by 4 customers

      Sort by

      Displaying reviews 1-4

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      5.0

      Awesome block

      By ron

      from Sturgeon Bay, WI

      About Me Advanced

      Verified Buyer

      Pros

      • Easy To Use
      • Quality Construction

      Cons

        Best Uses

        • Sailing

        Comments about Harken 57mm Sheave Diameter Block, Double/swivel Style, 1,584lb. Swl:

        I purchased this block to use in my single line reefing system at the base of the mast.I purchased the double block and I run two different reef lines through it. It is a lightweight block, the line move smoothly through it and it is generally a top quality product.

         
        5.0

        Best value vs. performance!

        By NautiC25

        from San Antonio, TX

        About Me Advanced

        Verified Reviewer

        Pros

        • Attractive Design
        • Easy To Install
        • Easy To Use
        • Lightweight
        • Quality Construction

        Cons

        • None

        Best Uses

        • Large Boats
        • Sailing
        • Small Boats

        Comments about Harken 57mm Sheave Diameter Block, Single/swivel Style, 792lb. Swl:

        These blocks are by far the best value. My boat came with a different brand from the factory, but I'm steadily upgraded to all Harken Carbo because of the weight, performance, and look.

         
        4.0

        Adjustable cam cleat a plus - up+down

        By WJRyan

        from Louisville, KY

        About Me Advanced

        Verified Buyer

        Pros

        • Pull up push down -ok
        • Wide range and direction

        Cons

          Best Uses

          • Sailing

          Comments about Harken 57mm Sheave Diameter Block, Fiddle/ratchet/cam Style, 793lb. Swl:

          Using this with adjustable cam cleat for my mainsheet on 28'. Works great.

           
          5.0

          every sailboat needs these

          By cap'n ray

          from harrisburg pa

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Perfect block

          Cons

          • None

          Best Uses

          • Sailing

          Comments about Harken 57mm Sheave Diameter Block, Single/swivel/cam Style, 300lb. Swl:

          allways the perfect block for whatever the application!

          Displaying reviews 1-4

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