Name: Carbo double pulley 29mm fixed head
Brand: HARKEN
SKU: 381
Price: 61.00 USD
Availability: InStock

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Carbo double pulley 29mm fixed head - HARKEN

This double block incorporates the renowned Carbo Air technology, offering a low friction coefficient and exceptional robustness in a compact format, ideal for quick, smooth, and secure adjustments while sailing.

Sheave Ø: 29 mm
Overall length: 54 mm
Featherlight weight: 34 g
Max rope Ø: 8 mm
Maximum working load: 299 kg
Breaking load: 737 kg

Its 29 mm sheave ensures smooth reeling, even with heavy loads, while its ultra-light weight allows for easy mounting without adding significant weight to the rigging line. The high working load (299 kg) far exceeds that of other blocks of similar size on the market, thus ensuring optimal safety during demanding maneuvers.

With Harken's advanced engineering, this double block features cutting-edge composite materials, combining lightness with maximum resistance to corrosion and wear. The innovative design of the Carbo Air model optimizes load distribution and significantly reduces friction for precise and quiet operation. Its fixed stainless steel head offers increased reliability on all types of boats, from sports dinghies to cruising sailboats.

SKU: 381 | Barcode: 097653134190

$61⁰⁰ USD

Sheave Ø (mm) 29 mm
Sheave Ø (in) 1 1/8 in
Length (mm) 54 mm
Length (in) 2 1/8 in
Weight (g) 34 g
Weight (oz) 1.2 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

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.