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Harken 2136 57mm Carbo Ratchet Block with Swivel and Becket

Manufacturer

Harken

<h3>About Harken: Performance Marine Hardware Since 1967</h3><p><strong>Harken</strong> is one of the most recognized names in performance marine hardware, with a legacy stretching back to 1967. <a href="/14853-harken">Harken</a> was founded in a 60-foot trailer by brothers Peter Harken and Olaf Harken, who set out to engineer better sailboat hardware than anything the market had to offer. Their early breakthrough — the plastic recirculating ball bearing block — redefined how sailors managed lines under load and launched a brand that would go on to dominate competitive sailing at the highest levels.</p><p>Headquartered in Pewaukee, Wisconsin, and with a major manufacturing facility in Limido Comasco, Italy, Harken operates as an employee-owned company with distribution spanning 48 countries. From club racing dinghies to grand prix offshore programs, Harken hardware has been aboard winning boats for decades — making its Olympic and America's Cup debuts in 1976 and 1977, respectively.</p><h3>A Full Range of Marine Hardware</h3><p>Harken's product lineup is broad by design. The company works hard to be the technological leader in sailboat blocks, deck hardware, winches, and hydraulics, as well as safety and rescue equipment and services. Their marine catalog includes small boat and big boat blocks, travelers and genoa leads, mainsail and headsail handling systems, winches, hydraulics, mooring solutions, and a robust line of spare parts and accessories.</p><p>At the core of it all are Harken's renowned <a href="/14853-harken-pulleys-blocks-200822">Pulleys &amp; Blocks</a> — the product category that started it all. Whether you're outfitting a high-tech racing dinghy or a bluewater cruising yacht, Harken blocks are engineered for high-load capacity, corrosion resistance, and the smoothest possible operation. The lineup spans sheave sizes from 16 mm all the way to 75 mm, with single, double, triple, fiddle, and soft-attach configurations to cover virtually every application on deck.</p><p>Beyond sailing, Harken also produces a dedicated line of sportfishing <a href="/14853-harken-pulleys-blocks-202394">Pulleys &amp; Blocks</a> engineered for the unique demands of offshore fishing. These compact, high-load pulleys are built for outrigger systems, dredge rigging, and heavy-duty line management — bringing the same patented bearing technology that excels on race courses to the rigors of the fishing cockpit.</p><h3>Why Sailors Trust Harken</h3><p>What sets Harken apart is a relentless commitment to engineering. Each product category is developed with input from top sailors, sailmakers, and boat designers — and the results speak for themselves on race courses worldwide. Harken hardware is a consistent fixture on America's Cup campaigns, Volvo Ocean Race fleets, Olympic classes, and everything in between. For cruisers, that race-proven performance translates into gear that is more reliable, longer-lasting, and more responsive than the alternatives.</p><ul><li>Employee-owned company with decades of marine engineering expertise</li><li>Manufacturing in the USA and Italy, with global distribution in 48 countries</li><li>Patented bearing systems engineered for high loads and minimal friction</li><li>Product lines covering everything from small dinghies to superyachts</li><li>Trusted at the Olympic Games and America's Cup since the 1970s</li></ul>

Part Number

2136
07/13/2036 1:42 AM
Sale Price

$84.67

2 left at this price

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Usually delivered within 2 days

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Product Details

The Harken 2136 57mm Carbo Ratchet Block with Becket is a high-performance sailing block designed to allow sailors to hand-hold loaded lines while maintaining an ideal balance between holding power and controlled easing. Featuring a swivel base and integrated becket, this block is well-suited for mainsheet systems, jib sheets, spinnaker sheets, traveler controls, and foreguys on dinghies and keelboats alike.

Key Features:

  • On/Off Switchable Ratchet: Provides precise control with accessible, easy-to-operate switches on both sides of the block — switch the ratchet on when you need holding power, off when you want a free-running line
  • Up to 10:1 Additional Holding Power: The 57mm ratchet sheave with eight facets grips the line securely under load, dramatically reducing hand fatigue
  • Glass-Fiber Reinforced Nylon Sideplates: Densely packed long-glass fibers replace traditional stainless steel reinforcing straps, delivering a compact block with an outstanding strength-to-weight ratio
  • Hardkote Anodized Machined Aluminum Sheave: Provides superior strength and long-term corrosion resistance in harsh marine environments
  • UV-Stabilized Components: Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection against sun degradation
  • Free-Rolling Ball Bearings: Ensure smooth, efficient line movement when the ratchet is disengaged
  • Swivel Base with Becket: Allows multi-directional lead angles and provides an attachment point for additional purchase systems

Specifications:

  • Sheave Diameter: 2-1/4 in (57 mm)
  • Block Length: 4-15/16 in (125 mm)
  • Weight with Shackle: 3.3 oz (94 g)
  • Maximum Line Diameter: 3/8 in (10 mm)
  • Shackle Pin Diameter: 3/16 in (5 mm)
  • Maximum Working Load: 500 lb (227 kg)
  • Breaking Load: 2,000 lb (907 kg)

For the ultimate mainsheet system, pair this switchable ratchet block in the cockpit with a boom-mounted Harken Ratchamatic® directly above — delivering double holding power in heavy air and a free-running mainsheet in light conditions. Manufacturer Part Number: 2136.

Products specifications

Type

Single

Diameter

3/8 Inch or 10 mm

Length

4 15/16 Inches

Mount Type

Swivel Shackle

Weight

0.21

Ball Bearings

Plastic

Becket

Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Ratcheting

Safe Working Load

500 Pounds

Sheave Diameter

57 mm

Tank arrived on time and undamaged.

Your system showed delivery three days before it was delivered. Caused of concern.

Tires were as advertised, quick delivery overall great experience

Painless order at a couple hundred dollars less than other online suppliers.

WAS VERY EASY TO PLACE AN ORDER, WILL WAIT FOR DELIVERY!

It was delivered when it said it was supposed to haven't opened it yet but look forward to seeing it

WE have not done the install yet. We will let you know if we have any issues. Thank you

Great service and shipping!

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