Name: Recessed bullet, 29 mm flat, stainless steel
Brand: HARKEN
SKU: 287
Price: 46.69 EUR
Availability: InStock

Voir tous les produits de la catégorie simple pulley

Recessed bullet, 29 mm flat, stainless steel

More details

The Harken 29 mm Stainless Steel Plate Bullet Flush Mount Block is designed to optimize the guidance of control lines aft with minimal friction, ensuring quick engagement and release under all loads, whether light or heavy.

Sheave Ø: 29 mm (1 1/8 in)
Overall Length: 76 mm (3 in)
Weight: 35 g (1.25 oz)
Max. Line Ø: 8 mm (5/16 in)
Maximum Working Load: 136 kg (300 lb)

The Harken 29 mm Stainless Steel Plate Bullet Block stands out for its impressive breaking strength of 907 kg (2000 lb), well beyond the usual standards for this category of flush mount blocks. Its stainless steel robustness ensures increased corrosion resistance even in extreme marine conditions. This is complemented by the performance of its low friction system.

Reduced friction coefficient for easier maneuvers
Compact and lightweight, perfect for integration on all types of boats
High durability against wear and corrosion thanks to stainless steel construction
Easy installation with standard dimensions: 5 RH mm (#10 RH in) screws, 57 mm (2 1/4 in) hole spacing, 19 x 44 mm (3/4 x 1 3/4 in) cutout
Versatility, suitable for most control lines and deck or mast applications

SKU: 287 | Barcode: 097653010081

€46⁶⁹ EUR

Length (in) 3 in
Sheave Ø (mm) 29 mm
Sheave Ø (in) 1 1/8 in
Length (mm) 76 mm
Weight (g) 35 g
Weight (oz) 1.25 oz
Max. Rope Ø (mm) 8 mm
Max. Rope Ø (in) 5/16 in
Screw (mm) 5 RH mm
Screw (in) #10 RH in
Hole Spacing (mm) 57 mm
Hole Spacing (in) 2 1/4 in
Cut-out (mm) 19 x 44 mm
Cut-out (in) 3/4 x 1 3/4 in
Maximum Working Load (kg) 136 kg
Maximum Working Load (lb) 300 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.