Name: Ringot double Carbo pulley 29 mm
Brand: HARKEN
SKU: 343
Price: 68.06 EUR
Availability: InStock

Voir tous les produits de la catégorie double pulley

Ringot double Carbo pulley 29 mm

More details

Designed for demanding sailors, it combines lightness, strength, and reliability, while offering an exceptionally low friction coefficient for smooth and safe maneuvers.

Sheave diameter: 29 mm
Overall length: 85 mm
Weight: 54 g
Max rope diameter: 8 mm
Maximum working load: 299 kg
Breaking load: 737 kg

The Carbo double Ringot 29 mm block stands out for its compact design and its ability to withstand high loads without compromising on lightness. An ideal complement to Harken's renowned Black Magic range, this model is distinguished by significantly improved strength and increased longevity, while remaining particularly affordable. Whether you are a passionate racer or a cruising enthusiast looking for reliable equipment, this block guarantees precise and effortless adjustment, even under heavy load.

Construction from innovative materials combining lightness and durability
Optimized bearing system for a low friction coefficient
High compatibility with common rope diameters (up to 8 mm)
Enhanced safety thanks to a high maximum working load
Easy installation and maintenance thanks to its compact dimensions and light weight

SKU: 343 | Barcode: 097653100355

€68⁰⁶ EUR

Sheave Ø (mm) 29 mm
Sheave Ø (in) 1 1/8 in
Length (mm) 85 mm
Length (in) 3 3/8 in
Weight (g) 54 g
Weight (oz) 1.9 oz
Max. Rope Ø (mm) 8 mm
Max. Rope Ø (in) 5/16 in
Maximum Working Load (kg) 299 kg
Maximum Working Load (lb) 660 lb
Breaking Load (lb) 1625 lb
Breaking Load (kg) 737 kg
Shackle Pin Ø (mm) 5 mm
Shackle Pin Ø (in) 3/16 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.