Name: Carbo 57mm Pulley Ratcha/rgt/taq.
Brand: HARKEN
SKU: 2 628
Price: 244.00 USD
Availability: InStock

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Carbo 57mm Pulley Ratcha/rgt/taq. - HARKEN

This smart ratchet block rotates freely under light loads and automatically engages a holding mechanism as tension increases, ensuring optimal control and smooth operation during maneuvers.

Sheave Ø: 57 mm
Overall Length: 125 mm
Weight: 275 g
Max Rope Ø: 10 mm
Maximum Working Load: 272 kg
Breaking Load: 680 kg
Shackle Pin Ø: 5 mm
Holding Power: 10:1

This exclusive Harken mechanism allows for seamless transitions between free-running and ratchet modes, offering progressive and precise control, even under variable loads.

Load-sensing Ratchamatic® system for automatic adaptation to effort
Reduced fatigue during maneuvers thanks to exceptional 10:1 holding power
Lightweight and robust materials ensure durability and longevity in marine environments
Ultra-smooth handling for instant transitions between modes, improving safety and responsiveness
Perfect compatibility with modern ropes up to 10 mm in diameter

SKU: 2 628 | Barcode: 097653113348

$244⁰⁰ USD $285⁰⁰

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 125 mm
Length (in) 4 15/16 in
Weight (g) 275 g
Weight (oz) 9.7 oz
Max rope Ø (mm) 10 mm
Max rope Ø (in) 3/8 in
Maximum working load (kg) 272 kg
Maximum working load (lb) 600 lb
Breaking load (lb) 1500 lb
Breaking load (kg) 680 kg
Shackle Ø (mm) 5 mm
Shackle 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.