Name: 57mm Violin Carbo Pulley
Brand: HARKEN
SKU: 2 621
Price: 89.00 USD
Availability: InStock

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57mm Violin Carbo Pulley - HARKEN

The Harken 57mm Carbo Fiddle Block is designed to provide smooth and secure adjustment while maintaining remarkable lightness. Thanks to its low friction coefficient, this block stands out for its exceptional robustness and reliability, meeting the demands of the most discerning sailors.

Sheave Ø: 57 mm
Overall length: 153 mm
Weight: 105 g
Max line Ø: 10 mm
Maximum working load: 359 kg
Breaking load: 1080 kg
Shackle pin Ø: 5 mm

A true complement to the Black Magic series, it allows recreational sailors to achieve optimal performance without compromising safety or durability.

Harken Carbo Air technology for maximum friction reduction
Lightweight body and high-performance materials for increased strength
Compact, easy to install, and ideal for quick adjustments while sailing
Featherlight weight facilitates maneuverability without adding equipment weight
Compatibility with ropes up to 10 mm to suit many nautical uses

SKU: 2 621 | Barcode: 097653100607

$89⁰⁰ USD

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 153 mm
Length (in) 6 in
Weight (g) 105 g
Weight (oz) 3.7 oz
Max rope Ø (mm) 10 mm
Max rope Ø (in) 3/8 in
Max working load (kg) 359 kg
Max working load (lb) 792 lb
Breaking load (lb) 2380 lb
Breaking load (kg) 1080 kg
Shackle Ø (mm) 5 mm
Shackle 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.