Name: Ringot double Carbo pulley 57 mm
Brand: HARKEN
SKU: 2 603
Price: 128.00 USD
Availability: InStock

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Ringot double Carbo pulley 57 mm - HARKEN

This double block combines lightness, robustness, and reliability to ensure quick and safe adjustments, even under heavy loads.

Sheave diameter: 57 mm
Overall length: 142 mm
Weight: 187 g
Maximum rope diameter: 10 mm
Maximum working load: 720 kg

This block complements Harken's renowned Black Magic range, offering a more affordable solution without compromising quality, durability, or ease of adjustment.

Carbo Air Block technology gives this block extremely low friction, guaranteeing smooth and precise rigging adjustments. Its compact design and high mechanical capacity ensure unwavering reliability. The choice of highly corrosion-resistant materials extends the product's lifespan, while its lightweight construction facilitates handling and reduces on-board load. With a breaking load of 1500 kg, this Harken block stands out as the benchmark for sailors seeking optimal performance and absolute safety with every maneuver.

SKU: 2 603 | Barcode: 097653076926

$128⁰⁰ USD $173⁰⁰

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 142 mm
Length (in) 5 5/8 in
Weight (g) 187 g
Weight (oz) 6.6 oz
Max rope Ø (mm) 10 mm
Max rope Ø (in) 3/8 in
Maximum working load (kg) 720 kg
Maximum working load (lb) 1584 lb
Breaking load (lb) 3300 lb
Breaking load (kg) 1500 kg
Shackle pin Ø (mm) 6 mm
Shackle pin 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.