Smooth Control: Harken Blocks & Pulleys
Engineered for strength and efficiency, Harken blocks are the industry standard for sailors who demand precision. Whether you are trimming a mainsheet on a grand prix racer or simplifying a control line on a day boat, Harken’s hardware provides the reliability and low-friction performance needed to handle high loads with ease.
Innovation in Motion
From the iconic Carbo AirBlocks® to the high-load Black Magic® range, Harken focuses on reducing weight while maximizing power.
- Low Friction Technology: Ball bearing and roller bearing systems designed for immediate release and smooth trimming.
- Lightweight Durability: High-strength resins and salt-water resistant metals ensure longevity in the harshest marine environments.
- Versatile Configurations: Available in single, double, triple, fiddle, and tie-on versions to suit every rigging need.
- The Choice of Champions: Trusted by Olympic athletes and America’s Cup teams for their consistency and mechanical advantage.
Choose the Right Range
| Series | Best For | Key Characteristic |
|---|---|---|
| Carbo AirBlocks® | Dinghies & Small Keelboats | Lightweight, fiber-reinforced nylon |
| Black Magic® | Offshore & High-Performance | High-load roller bearings & sleek finish |
| Element Blocks | Cruising & Durability | Robust, simple, and cost-effective |
| Micro & Bullet | Control Lines & Vangs | Compact design for small-diameter ropes |
Expert Tip: Regularly flush your Harken blocks with fresh water to remove salt and grit. This simple step keeps the bearings spinning freely and prevents premature wear.
Ready to optimize your rig? Explore our comprehensive collection of Harken blocks below and find the perfect mechanical advantage for your boat.
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Harken 40mm Carbo Single Block and Becket with Swivel Head
In stock
Regular price £43.45Sale price £43.45 Regular priceUnit price per£49.66Sale -
Harken 40mm Carbo Double Block with Swivel Shackle Head
Regular price £84.67Sale price £84.67 Regular priceUnit price per£96.77Sale -
Harken 40mm Carbo Double Block with Swivel Shackle and Becket
Regular price £91.66Sale price £91.66 Regular priceUnit price per£104.75Sale -
Harken 40mm Carbo Triple Block with Swivel Shackle Head
Regular price £139.76Sale price £139.76 Regular priceUnit price per£159.73Sale -
Harken 40mm Carbo Triple Block with Swivel Shackle and Becket
Regular price £145.91Sale price £145.91 Regular priceUnit price per£166.75Sale -
Harken 40mm Carbo Double Block Fixed
Regular price £70.63Sale price £70.63 Regular priceUnit price per£80.72Sale -
Harken 40mm Carbo Double/Fixed Block with Becket
Regular price £76.73Sale price £76.73 Regular priceUnit price per£87.69Sale -
Harken 40mm Carbo Cheek Block
In stock
Regular price £35.98Sale price £35.98 Regular priceUnit price per£41.12Sale -
Harken 40mm Carbo Single Block with Swivel Carbo Cam
Regular price £121.84Sale price £121.84 Regular priceUnit price per£139.25Sale -
Harken Carbo 40mm Traveller Block
Regular price £48.56Sale price £48.56 Regular priceUnit price per£55.50Sale -
Harken 40mm Carbo Single Block with Lacing Eye and Spring
Regular price £41.10Sale price £41.10 Regular priceUnit price per£46.97Sale -
Harken 40mm Carbo Quad Block with Swivel
Regular price £185.59Sale price £185.59 Regular priceUnit price per£212.10Sale -
Harken 40mm Carbo Fiddle Block
In stock
Regular price £51.40Sale price £51.40 Regular priceUnit price per£58.74Sale -
Harken 40mm Carbo Fiddle Block with Becket
Regular price £57.52Sale price £57.52 Regular priceUnit price per£65.74Sale -
Harken 40mm Carbo Single Block 90 Degree Fixed Head
Regular price £41.73Sale price £41.73 Regular priceUnit price per£47.69Sale -
Harken 75mm Carbo Single Block With Swivel Head
Regular price £96.92Sale price £96.92 Regular priceUnit price per£110.76Sale -
Harken 75mm Carbo Single Block with Swivel Head And Becket
Regular price £110.50Sale price £110.50 Regular priceUnit price per£126.29Sale -
Harken 75mm Carbo Double Block with Swivel Head and Becket
Regular price £205.02Sale price £205.02 Regular priceUnit price per£234.31Sale -
Harken 75mm Carbo Triple Block with Swivel Head
Regular price £273.70Sale price £273.70 Regular priceUnit price per£312.80Sale -
Harken 75mm Carbo Triple Block with Swivel Head and Becket
Regular price £287.29Sale price £287.29 Regular priceUnit price per£328.33Sale -
Harken 75mm Carbo Single Block With Swivel Head/150 Cam-Matic
Regular price £243.81Sale price £243.81 Regular priceUnit price per£278.64Sale -
Harken 75mm Carbo Single Block With Swivel Head/150 Cam-Matic and Becket
Regular price £257.33Sale price £257.33 Regular priceUnit price per£294.09Sale -
Harken 75mm Carbo Triple Block with Swivel Head/150 Cam-Matic
Regular price £440.76Sale price £440.76 Regular priceUnit price per£503.73Sale -
Harken 75mm Carbo Triple Block with Swivel Head and Becket/150 Cam-Matic
Regular price £454.35Sale price £454.35 Regular priceUnit price per£519.26Sale -
Harken 75mm Carbo Ratchet Single Block with Swivel Head
In stock
Regular price £104.69Sale price £104.69 Regular priceUnit price per£119.64Sale -
Harken 75mm Carbo Ratchet 75mm Single Block and Becket With Swivel Head
Regular price £118.48Sale price £118.48 Regular priceUnit price per£135.40Sale -
Harken 75mm Carbo Ratchet 75mm Cheek Block
Regular price £102.41Sale price £102.41 Regular priceUnit price per£117.04Sale -
Harken 57mm Carbo Fiddle Block with Ratchet /150 Cam-Matic and Becket
Regular price £217.65Sale price £217.65 Regular priceUnit price per£248.74Sale -
Harken 75mm Carbo Quad Block with Swivel Head
Regular price £307.38Sale price £307.38 Regular priceUnit price per£351.29Sale -
Harken 75mm Carbo Flip-Flop Block
Regular price £258.27Sale price £258.27 Regular priceUnit price per£295.16Sale -
Harken 75mm Carbo Flip-Flop Block with 150 Cam-Matic
Regular price £402.70Sale price £402.70 Regular priceUnit price per£460.23Sale -
Harken 75mm Carbo Ratchamatic Single Block with Swivel Head
Regular price £163.35Sale price £163.35 Regular priceUnit price per£186.68Sale -
Harken 75mm Carbo Ratchamatic Single Block with Swivel Head and Becket
Regular price £176.63Sale price £176.63 Regular priceUnit price per£201.86Sale -
Harken 75mm Carbo Ratchamatic Single Block /150 Cam-Matic and Becket
Regular price £331.52Sale price £331.52 Regular priceUnit price per£378.88Sale -
Harken 75mm Carbo Ratchamatic Triple Block /150 Cam-Matic
Regular price £490.92Sale price £490.92 Regular priceUnit price per£561.05Sale -
Harken 75mm Carbo Ratchamatic Triple Block /150 Cam-Matic/57mm Block/Becket
Regular price £570.47Sale price £570.47 Regular priceUnit price per£651.97Sale -
Harken 75mm Carbo Ratchamatic Flip-Flop Block
Regular price £317.60Sale price £317.60 Regular priceUnit price per£362.97Sale -
Harken 75mm Carbo Ratchamatic Flip-Flop Block w/150 Cam-Matic
Regular price £455.80Sale price £455.80 Regular priceUnit price per£520.91Sale -
Harken 75mm Carbo Fiddle Block
Regular price £119.72Sale price £119.72 Regular priceUnit price per£136.82Sale -
Harken 75mm Carbo Fiddle Block and Becket
Regular price £130.22Sale price £130.22 Regular priceUnit price per£148.82Sale -
Harken 75mm Carbo Fiddle Block /150 Cam-Matic
Regular price £223.44Sale price £223.44 Regular priceUnit price per£255.36Sale -
Harken 75mm Carbo Fiddle Block /150 Cam-Matic and Becket
Regular price £232.55Sale price £232.55 Regular priceUnit price per£265.77Sale -
Harken 75mm Carbo Fiddle Block with Ratchet
Regular price £157.42Sale price £157.42 Regular priceUnit price per£179.91Sale -
Harken 75mm Carbo Fiddle Block with Ratchet and Becket 2695
Regular price £153.27Sale price £153.27 Regular priceUnit price per£175.17Sale -
Harken 75mm Carbo Fiddle Block with Ratchet /150 Cam-Matic and Becket
Regular price £278.15Sale price £278.15 Regular priceUnit price per£317.89Sale -
Harken 29mm Bullet Thru Deck Block
Regular price £40.43Sale price £40.43 Regular priceUnit price per£46.21Sale -
Harken 29mm Bullet Wire Thru Deck Block
Regular price £46.94Sale price £46.94 Regular priceUnit price per£53.65Sale -
Harken 29mm Bullet In-Line Exit Block
In stock
Regular price £56.83Sale price £56.83 Regular priceUnit price per£64.95Sale -
Harken Micro Single Block with Swivel Shackle
Regular price £28.72Sale price £28.72 Regular priceUnit price per£32.82Sale -
Harken 25mm High Tension Single Block
In stock
Regular price £45.45Sale price £45.45 Regular priceUnit price per£51.94Sale -
Harken 38mm High Tension Single Block
Regular price £72.73Sale price £72.73 Regular priceUnit price per£83.12Sale -
Harken 38mm High Tension Wire Thru-Deck Block
Regular price £81.48Sale price £81.48 Regular priceUnit price per£93.12Sale -
Harken 25mm High Tension Single Block and Becket
Regular price £54.71Sale price £54.71 Regular priceUnit price per£62.53Sale -
Harken 38mm High Tension Wire Ferrule Head Block
Regular price £86.13Sale price £86.13 Regular priceUnit price per£98.44Sale -
Harken 29mm Carbo Single Block with Swivel Shackle and Becket
In stock
Regular price £33.99Sale price £33.99 Regular priceUnit price per£38.84Sale -
Harken 29mm Carbo Double Block with Swivel Shackle
Regular price £53.04Sale price £53.04 Regular priceUnit price per£60.62Sale -
Harken 29mm Carbo Double Block with Swivel Shackle and Becket
Regular price £57.52Sale price £57.52 Regular priceUnit price per£65.74Sale -
Harken 29mm Carbo Triple Block with Swivel Shackle
Regular price £69.56Sale price £69.56 Regular priceUnit price per£79.50Sale -
Harken 29mm Carbo Triple Block with Swivel Shackle and Becket
Regular price £74.07Sale price £74.07 Regular priceUnit price per£84.65Sale -
Harken 29mm Carbo Single Block
In stock
Regular price £16.85Sale price £16.85 Regular priceUnit price per£19.26Sale -
Harken 29mm Carbo Single Block with Lacing Eye and Spring
Regular price £26.39Sale price £26.39 Regular priceUnit price per£30.16Sale -
Harken 29mm Carbo Cheek Block
In stock
Regular price £16.68Sale price £16.68 Regular priceUnit price per£19.06Sale -
Harken 29mm Carbo Single Block 90 degrees Fixed Head Lock
In stock
Regular price £22.60Sale price £22.60 Regular priceUnit price per£25.83Sale -
Harken 16mm Airblock Inline Exit Block
Regular price £64.79Sale price £64.79 Regular priceUnit price per£74.04Sale
