Name: 16 mm Hook-on Airblock
Brand: HARKEN
SKU: 391
Price: 30.00 USD
Availability: InStock

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16 mm Hook-on Airblock - HARKEN

The 16 mm Airblock with hook by Harken® is an ultra-compact block specially designed for small synthetic fiber control lines on the most modern dinghies. Leveraging a patented bearing system with captive stainless steel balls, this block offers exceptional strength and performance despite its miniature size.

Sheave Ø: 16 mm
Overall length: 41 mm
Weight: 13 g
Max rope Ø: 5 mm
Maximum working load: 113 kg
Breaking load: 181 kg

The 16 mm Airblock with hook offers impressive load capacity for a featherlight weight of just 13 grams, a fraction of the weight of equivalent blocks. This allows for easier installation and optimized performance, particularly on boats requiring the slightest optimization of mass and reliability.

Harken innovates with a captive stainless steel ball bearing system, offering extremely smooth rotation and limiting wear. The 16 mm Airblock with hook is distinguished by:

Its exceptional resistance to high loads, ideal for intensive applications on high-tech dinghies;
Its compatibility with ropes up to 5 mm in diameter;
A meticulous and robust finish, true to the Harken® brand's standards.

Adopted by performance and lightweight enthusiasts.

SKU: 391 | Barcode: 097653113690

$30⁰⁰ USD

Sheave diameter (mm) 16 mm
Sheave diameter (in) 5/8 in
Length (mm) 41 mm
Length (in) 1 5/8 in
Weight (g) 13 g
Weight (oz) .5 oz
Max rope diameter (mm) 5 mm
Max rope diameter (in) 7/32 in
Maximum working load (kg) 113 kg
Maximum working load (lb) 250 lb
Breaking strength (lb) 400 lb
Breaking strength (kg) 181 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.