Name: 40mm Double Carbo Pulley
Brand: HARKEN
Price: 100.25 EUR
Availability: InStock

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40mm Double Carbo Pulley - HARKEN

40mm double carbo pulley: Exceptional strength & remarkable lightness. Harken quality and optimal safety.

More details

Thanks to its compact design and low-friction coefficient, this block guarantees safe and quick adjustment, even under high loads.

Overall length: 94 mm (3 11/16 in)
Sheave diameter: 40 mm (1 9/16 in)
Weight: 86 g (3.2 oz)
Shackle diameter: 5 mm (3/16 in)
Maximum working load: 440 kg (970 lb)
Breaking load: 1080 kg (2380 lb)
Maximum rope diameter: 10 mm (3/8 in)

This model features a high maximum working load, ensuring stability and safety. Its compact design allows for smooth handling and easy installation, while offering perfect compatibility with Harken's Black Magic range. Its advanced materials and design guarantee long-lasting performance against wear and harsh marine conditions.

Compact and lightweight assembly, ideal for optimizing maneuverability without weighing down equipment.
Advanced materials offering a low friction coefficient and superior corrosion resistance.
Double sheave allowing for better load distribution and maximum efficiency during maneuvers.
Impressive load capacity for confident adjustments, even under extreme constraints.
Ideal compatibility with modern ropes up to 10 mm.

SKU: 2 638 | Barcode: 097653077312

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€100²⁵ EUR

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Length (in) 3 11/16 in
Sheave Ø (mm) 40 mm
Sheave Ø (in) 1 9/16 in
Length (mm) 94 mm
Weight (g) 86 g
Weight (oz) 3.2 oz
Shackle Ø (mm) 5 mm
Shackle Ø (in) 3/16 in
Max. Rope Ø (mm) 10 mm
Max. Rope Ø (in) 3/8 in
Maximum Working Load (kg) 440 kg
Maximum Working Load (lb) 970 lb
Breaking Load (kg) 1080 kg
Breaking Load (lb) 2380 lb

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.