Name: Carbo 57mm violin-style pulley with ratchet cleat
Brand: HARKEN
SKU: 2 675
Price: 204.00 EUR
Availability: InStock

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Carbo 57mm violin-style pulley with ratchet cleat - HARKEN

This innovative winch block allows you to maintain control of the rope under load while ensuring a perfect balance between holding power and smooth, controlled release.

Sheave Ø: 57 mm
Overall length: 118 mm
Weight: 294 g
Max rope Ø: 10 mm
Maximum working load: 359 kg
Breaking load: 1080 kg
Holding power: 10:1
Shackle Ø: 5 mm

Thanks to its 57 mm sheave and integrated cleat system, it allows precise management of sheets and ropes.

Carbo Air Technology which combines lightweight composite material and high strength.
10:1 Ratchet system for improved gearing power.
Integrated cleat facilitates rope locking during accelerations or critical maneuvers.
Capacity to accommodate ropes up to 10 mm in diameter, compatible with most modern sailboat configurations.
5 mm stainless steel shackle ensuring secure and durable attachment.
Controlled release thanks to an ergonomic design and smooth sheave rotation.

SKU: 2 675 | Barcode: 097653238232

€204⁰⁰ EUR €209⁹⁰

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 118 mm
Length (in) 4 5/8 in
Weight (g) 294 g
Weight (oz) 10.4 oz
Max. rope Ø (mm) 10 mm
Max. rope Ø (in) 3/8 in
Maximum working load (kg) 359 kg
Maximum working load (lb) 792 lb
Breaking load (lb) 2380 lb
Breaking load (kg) 1080 kg
Shackle pin Ø (mm) 5 mm
Shackle pin Ø (in) 3/16 in
Holding power 10:1

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.