Name: Triple Air-Block Ringot 16 mm
Brand: HARKEN
SKU: 409
Price: 54.90 EUR
Availability: InStock

Voir tous les produits de la catégorie triple pulley

Triple Air-Block Ringot 16 mm - HARKEN

Featuring Harken's patented bearing technology and captive stainless steel balls, this block is ideal for fine-tuning with lightweight synthetic rope.

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

Traditional blocks increase resistance but add weight to the rigging: this Harken model guarantees incomparable lightness without compromising strength or safety.

Patented bearing system with captive stainless steel balls, ensuring exemplary fluidity and increased durability
Ultra-compact design ideal for confined spaces on high-tech dinghies, optimizing every centimeter of the rigging
Excellent maximum working and breaking load capacity, ensuring reliability and safety with every use
Manufactured by Harken, the world leader recognized for innovation and performance in the sailing industry

SKU: 409 | Barcode: 097653014959

€54⁹⁰ EUR €60⁵⁴

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 strength (lb) 1200 lb
Breaking strength (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.