Name: Airblock 16 mm Flip-flop
Brand: HARKEN
Price: 51.59 EUR
Availability: InStock

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Airblock 16 mm Flip-flop - HARKEN

Airblock 16 mm Flip-flop: Maximum compactness & ultra-robust stainless steel bearing system. Harken® performance and reliability guaranteed.

More details

This model features an innovative system of ultra-robust stainless steel ball bearings to ensure maximum performance.

Sheave Ø: 16 mm
Overall length: 34 mm
Weight: 21 g
Maximum rope diameter: 5 mm
Maximum working load: 113 kg
Breaking load: 544 kg

The Airblock 16 mm Flip-flop block stands out for its compactness and lightness, perfectly meeting the requirements of sailors wishing to optimize the rigging of their dinghies. Where other blocks sacrifice strength to save weight, Harken® technology achieves remarkable resistance while maintaining an ultra-small size and smooth operation. This block is a preferred choice for sailing enthusiasts looking for both performance and reliability.

Patented bearing system with captive stainless steel balls for increased durability
Exceptional load capacity (113 kg – 544 kg breaking) despite a mini size
Perfect compatibility with synthetic ropes up to 5 mm
Lightweight design (only 21 g) for easy installation without adding extra weight to the assembly
Robust construction by Harken®, synonymous with quality and innovation in marine hardware

SKU: 437 | Barcode: 097653071495

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€51⁵⁹ EUR

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Sheave diameter (mm) 16 mm
Sheave diameter (in) 5/8 in
Length (mm) 34 mm
Length (in) 1 5/16 in
Weight (g) 21 g
Weight (oz) .75 oz
Max rope diameter (mm) 5 mm
Max rope diameter (in) 7/32 in
Screw (mm) 4 RH mm
Screw (in) #8 RH in
Maximum working load (kg) 113 kg
Maximum working load (lb) 250 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.