Name: 29mm double bullet
Brand: HARKEN
SKU: 84
Price: 54.45 EUR
Availability: InStock

Voir tous les produits de la catégorie double pulley

29mm double bullet - HARKEN

Harken's 29mm Bullet double block is a high-performance double pulley designed for efficient guidance of control lines aft. Compact and lightweight, it ensures low friction and offers quick and precise handling, even under heavy loads.

Length: 70 mm (2 3/4 in)
Sheave Ø: 29 mm (1 1/8 in)
Weight: 71 g (2.5 oz)
Shackle Ø: 5 mm (3/16 in)
Max. line Ø: 8 mm (5/16 in)
Maximum working load: 181 kg (400 lb)
Breaking load: 907 kg (2000 lb)

Harken's 29mm Bullet double block stands out for its compact size and ability to withstand heavy loads without sacrificing lightness. This model maintains perfect glide and fast release, thus optimizing the efficiency of the trimming system.

Ergonomic and lightweight design for easy installation on board any sailboat.
Bearing system significantly reducing friction, suitable for lines up to 8 mm in diameter.
Impressive breaking strength (907 kg), far superior to many competing blocks of the same size.
Harken quality recognized for its durability and reliability in extreme marine conditions.
Ideal for managing control lines and trimming systems requiring precision and quick maneuvering.

SKU: 84 | Barcode: 097653002901

€54⁴⁵ EUR

Length (in) 2 3/4 in
Sheave Ø (mm) 29 mm
Sheave Ø (in) 1 1/8 in
Length (mm) 70 mm
Weight (g) 71 g
Weight (oz) 2.5 oz
Shackle Ø (mm) 5 mm
Shackle Ø (in) 3/16 in
Max rope Ø (mm) 8 mm
Max rope Ø (in) 5/16 in
Maximum working load (kg) 181 kg
Maximum working load (lb) 400 lb
Breaking load (kg) 907 kg
Breaking load (lb) 2000 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.