Name: 57mm Carbo pulley with 5 sheaves
Brand: HARKEN
SKU: 2 762
Price: 249.00 EUR
Availability: InStock

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57mm Carbo pulley with 5 sheaves

More details

Specifically designed for ultra-low friction and maximum reliability, it ensures safety and efficiency during demanding adjustments on board.

Sheave Ø: 57 mm
Length: 121 mm
Weight: 448 g
Max Rope Ø: 10 mm
Maximum Working Load: 1080 kg

The Carbo 57 mm 5-sheave block stands out for its lightweight and strong design, surpassing many competing models thanks to its compactness and exceptional load capacity.

Construction from Carbo Air composite materials: incomparable lightness and high corrosion resistance
5-sheave system allowing optimal load distribution and smooth rope handling
6 mm shackle pin Ø, compatible with most common deck configurations
Impressive resistance capacity: maximum working load of 1080 kg and breaking load of 2270 kg to meet the demands of intensive sailing
Enhanced reliability and longevity, even in extreme marine conditions

SKU: 2 762 | Barcode: 097653151968

€249⁰⁰ EUR €274⁴⁵

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 121 mm
Length (in) 4 3/4 in
Weight (g) 448 g
Weight (oz) 15.8 oz
Max. rope Ø (mm) 10 mm
Max. rope Ø (in) 3/8 in
Maximum working load (kg) 1080 kg
Maximum working load (lb) 2380 lb
Breaking load (lb) 5000 lb
Breaking load (kg) 2270 kg
Shackle Ø (mm) 6 mm
Shackle Ø (in) 1/4 in

Our tips for choosing

Workload and breaking load

Choose your pulley based on the workload it will have to handle and the desired gear ratio. The orders of magnitude vary depending on the support: 400 to 500kg for the mainsheet or cunningham of an 18-foot catamaran, 100 to 200kg for the mainsheet or downhaul of a 420 dinghy for example.

Coefficient of friction

Modern ball bearing pulleys offer a much lower coefficient of friction than those without balls and are recommended for maneuvers that require constant adjustment (mainsail sheet, downhaul, cunningham, spinnaker essentially).

Restraining force

For the mainsheet which is not always fully tightened, or even never on some boats which require constant adjustment (29er, 49er, Class A,...) as for the spinnaker sheet, favor automatic or non-automatic winch pulleys, which considerably save muscles and gloves thanks to a retention that can go up to 70% of the workload.

Sheave diameter

Choose the diameter of the pulley according to the diameter of the rope it will guide. For example, depending on the support and workload, a 40 or 57 sheave is very suitable for a 6 to 10mm mainsail sheet. For Cunningham or downhaul type maneuvers, 16 or 22 sheaves are suitable.

Material

Stainless steel, carbon, composite, it's essentially a matter of weight, with an impact on the price: it all depends on the importance you attach to it. If the pulley is to guide a cable, use aluminum sheaves which will be much more resistant than composite materials.