Name: 16mm swivel air block
Brand: HARKEN
SKU: 417
Price: 41.00 USD
Availability: InStock

Voir tous les produits de la catégorie simple pulley

16mm swivel air block - HARKEN

The Harken® 16 mm Swivel Air Block is the most compact in the range, specially designed for applications requiring precision and lightness. Ideal for small synthetic fiber control lines on high-tech dinghies, this block incorporates a patented system where stainless steel ball bearings roll in a groove, optimizing fluidity and reliability even under high stress.

Sheave Ø: 16 mm
Overall length: 60 mm
Weight: 18 g
Max rope Ø: 5 mm
Maximum working load: 113 kg
Breaking load: 544 kg

This model focuses on a minimalist design without compromising on performance or safety. The working load of 113 kg and the breaking load of 544 kg offer unparalleled assurance for all your maneuvers, often exceeding industry standards for small sizes.

• Harken® patented bearing technology, ensuring smooth action under load
• Superior marine quality through the exclusive use of stainless steel
• Ultra-compact format facilitating integration on any dinghy or small boat
• Robustness and durability ideal for intensive use and competitions

SKU: 417 | Barcode: 097653016069

$41⁰⁰ USD

Sheave Ø (mm) 16 mm
Sheave Ø (in) 5/8 in
Length (mm) 60 mm
Length (in) 2 3/8 in
Weight (g) 18 g
Weight (oz) .63 oz
Max rope Ø (mm) 5 mm
Max rope Ø (in) 7/32 in
Screw (mm) 4 RH mm
Screw (in) #8 RH in
Max working load (kg) 113 kg
Max working load (lb) 250 lb
Breaking load (lb) 1200 lb
Breaking load (kg) 544 kg
Cutout (mm) 11 x 35 mm
Cutout (in) 7/16 x 1 3/8 in

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.