Name: 40mm Single Carbo Pulley
Brand: HARKEN
SKU: 2 636
Price: 44.17 EUR
Availability: InStock

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40mm Single Carbo Pulley - HARKEN

Designed to offer a low coefficient of friction, it combines robustness, lightness and reliability to satisfy the most demanding sailors, while remaining accessible and affordable.

Sheave Ø: 40 mm
Overall length: 102 mm
Weight: 48 g
Max rope Ø: 10 mm
Maximum working load: 220 kg

The 40 mm Single Carbo Block stands out for its ultra-compact size and an impressive working load of 220 kg. Its design using innovative composite materials from the Carbo Air range saves weight without sacrificing durability or safety,

Lightweight construction for optimal maneuverability
Exceptional breaking strength (735 kg)
Low-friction sheave: precise and quick adjustments, even under heavy load
Compatible with ropes up to 10 mm
Robust design that ensures increased longevity against salt and UV damage

SKU: 2 636 | Barcode: 097653077176

€44¹⁷ EUR

Sheave diameter (mm) 40 mm
Sheave diameter (in) 1 9/16 in
Length (mm) 102 mm
Length (in) 4 in
Weight (g) 48 g
Weight (oz) 1.7 oz
Max. rope diameter (mm) 10 mm
Max. rope diameter (in) 3/8 in
Max. working load (kg) 220 kg
Max. working load (lb) 485 lb
Breaking load (lb) 1620 lb
Breaking load (kg) 735 kg
Shackle diameter (mm) 4 mm
Shackle diameter (in) 5/32 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.