Name: 16mm Ringot Air Block
Brand: HARKEN
SKU: 405
Price: 22.39 EUR
Availability: InStock

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16mm Ringot Air Block - HARKEN

Harken's 16 mm Ringot Air Block is the most compact block in the range, specifically designed to meet the demands of fine-tuning on modern dinghies. Equipped with a patented bearing system with captive stainless steel balls, it guarantees optimal fluidity, even under high tension.

Sheave Ø: 16 mm
Overall length: 54 mm
Lightweight: 28 g
Max rope Ø: 5 mm
Maximum working load: 204 kg
Breaking load: 544 kg

Where other compact blocks may show signs of weakness under heavy load, this model ensures reliability and durability thanks to the advanced materials used and Harken's meticulous design. Whether you are outfitting an Olympic dinghy or optimizing a racing sailboat, this block is an essential choice on the market.

Captive stainless steel ball bearing system for friction-free rotation
Ultra-light and compact stainless steel body for easy installation even in confined spaces
High load capacity: supports up to 204 kg working load and 544 kg breaking load
Suitable for synthetic ropes up to 5 mm, ideal for dynamic adjustments
Harken reliability, a global reference for on-water performance

SKU: 405 | Barcode: 097653014911

€22³⁹ EUR

Sheave Ø (mm) 16 mm
Sheave Ø (in) 5/8 in
Length (mm) 54 mm
Length (in) 2 1/8 in
Weight (g) 28 g
Weight (oz) 1 oz
Max rope Ø (mm) 5 mm
Max rope Ø (in) 7/32 in
Maximum working load (kg) 204 kg
Maximum working load (lb) 450 lb
Breaking load (kg) 544 kg
Breaking load (lb) 1200 lb

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.