Name: AirBlock 16 mm swivel
Brand: HARKEN
SKU: 432
Price: 21.90 EUR
Availability: InStock

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AirBlock 16 mm swivel

More details

Thanks to its compact and innovative design, this ultra-lightweight block is perfect for fine adjustments on synthetic lines.

Sheave Ø: 16 mm (5/8 in)
Overall length: 35 mm (1 3/8 in)
Minimum weight: 11 g (.38 oz)
Max rope Ø: 5 mm (7/32 in)
Maximum working load: 113 kg (250 lb)
Breaking strength: 339 kg (750 lb)

The 16 mm AirBlock swivel stands out for its small size and its ability to withstand high loads despite its low weight.

Patented bearing system with captive stainless steel balls for ultra-smooth rotation
Ideal for demanding applications on high-tech dinghies
Ultra-light structure to minimize friction and weight on board
High load capacity relative to size
Premium materials ensuring longevity and strength

SKU: 432 | Barcode: 097653036579

€21⁹⁰ EUR €24⁴¹

Sheave Ø (mm) 16 mm
Sheave Ø (in) 5/8 in
Length (mm) 35 mm
Length (in) 1 3/8 in
Weight (g) 11 g
Weight (oz) .38 oz
Max. rope Ø (mm) 5 mm
Max. rope Ø (in) 7/32 in
Max. working load (kg) 113 kg
Max. working load (lb) 250 lb
Breaking load (lb) 750 lb
Breaking load (kg) 339 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.