Name: Air Block triple 16 mm
Brand: HARKEN
SKU: 408
Price: 57.58 EUR
Availability: InStock

Voir tous les produits de la catégorie triple pulley

Air Block triple 16 mm

More details

Compact and robust, this block stands out with its patented bearing system using captive stainless steel balls, ensuring ultra-smooth rotation and optimal longevity.

Sheave Ø: 16 mm
Overall length: 57 mm
Weight: 43 g
Max rope Ø: 5 mm
Maximum working load: 318 kg
Breaking load: 544 kg

This model ensures excellent performance even under heavy loads, while maintaining exceptional lightness.

Patented bearing system with captive stainless steel balls: guarantees smooth rotation, reduces friction, and extends product life
Compact and lightweight design: perfect for optimizing trim adjustments on hi-tech dinghies
Impressive strength: supports a maximum working load of 318 kg, with a breaking load of 544 kg, surpassing many competing models
Adaptability: accepts ropes up to 5 mm in diameter, ideal for all types of small, quick, and precise adjustments

This block stands out as the best choice on the market for modern dinghies.

SKU: 408 | Barcode: 097653014942

€57⁵⁸ EUR

Sheave Ø (mm) 16 mm
Sheave Ø (in) 5/8 in
Length (mm) 57 mm
Length (in) 2 1/4 in
Weight (g) 43 g
Weight (oz) 1.5 oz
Max. rope Ø (mm) 5 mm
Max. rope Ø (in) 7/32 in
Maximum working load (kg) 318 kg
Maximum working load (lb) 700 lb
Breaking load (lb) 1200 lb
Breaking load (kg) 544 kg

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.