Name: Carbo ratchamatic 57 mm triple taq/rgt pulley 2630 + 2659 (8:1)
Brand: HARKEN
SKU: 2 632
Price: 349.00 EUR
Availability: InStock

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Carbo ratchamatic 57 mm triple taq/rgt pulley 2630 + 2659 (8:1) - HARKEN

This ultra-high-performance ratchet block is equipped with a smart load sensor that allows free rotation in both directions under low load, while automatically engaging the ratchet when the load increases. Thanks to its smooth transition between ratchet mode and free-sheave mode, the changeover is seamless for optimal control of your maneuvers.

Sheave Ø: 57 mm
Length: 156 mm
Weight: 520 g
Max rope Ø: 10 mm
Maximum working load: 816 kg

The Harken Carbo Ratchamatic Block stands out for its impressive holding power of 10:1, coupled with exceptional robustness, with a breaking load reaching 2041 kg. Where many traditional blocks require frequent manual adjustments, Harken's Ratchamatic® mechanism automates this process for safer and smoother sailing.

Smart Ratchamatic® system with automatic engagement
Seamless transition between different modes (ratchet and free-sheave)
Lightweight structure and maximum resistance to optimize speed and safety
Suitable for ropes up to 10 mm for great versatility
Ideal for the demanding needs of regattas and intensive sailing

SKU: 2 632 | Barcode: 097653119104

€349⁰⁰ EUR €444⁵⁵

Sheave diameter (mm) 57 mm
Sheave diameter (in) 2 1/4 in
Length (mm) 156 mm
Length (in) 6 1/8 in
Weight (g) 520 g
Weight (oz) 18.3 oz
Max rope diameter (mm) 10 mm
Max rope diameter (in) 3/8 in
Maximum working load (kg) 816 kg
Maximum working load (lb) 1800 lb
Breaking load (lb) 4500 lb
Breaking load (kg) 2041 kg
Shackle pin diameter (mm) 6 mm
Shackle pin diameter (in) 1/4 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.