
Harken 29mm Double Block
The Harken 29mm Double Block features a lightweight design with high-load capacity, ideal for sailboat rigging. Its stainless steel sheave ensures smooth operation and durability in marine conditions, perfect for racers and cruising enthusiasts.
Out of stock items can be ordered and shipped out within 3-5 working days
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Pickup available at Marine Chandlery: North Shields
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Harken 29mm Double Block
Marine Chandlery: North Shields
Unit G4 Narvik Way
Tyne Tunnel Trading Estate
North Shields NE29 7XJ
United Kingdom

The Harken 29mm Double Block features a lightweight design with high-load capacity, ideal for sailboat rigging. Its stainless steel sheave ensures smooth operation and durability in marine conditions, perfect for racers and cruising enthusiasts.
The Harken 29mm Double Block features a lightweight design with high-load capacity, ideal for sailboat rigging. Its stainless steel sheave ensures smooth operation and durability in marine conditions, perfect for racers and cruising enthusiasts.
Description
The Harken 29mm Double Block is engineered for high performance in both racing and cruising applications. Featuring a lightweight yet robust design, this block is constructed from high-strength materials, ensuring longevity under demanding marine conditions. The sheave, with a precise 29mm diameter, allows for smooth and efficient line handling, reducing friction and facilitating better control during sail adjustments. Equipped with Harken's patented Delrin ball bearings, the block ensures superior operational efficiency, enabling faster and easier trimming. The block is compatible with a variety of rigging configurations, making it ideal for use with sails, halyards, and control lines. Additionally, its low-profile design minimizes windage, enhancing the performance of sailboats in various wind conditions. The Harken 29mm Double Block is designed to handle significant loads while remaining lightweight, making it suitable for both dinghies and larger yachts. Its versatile mounting options, including shackle and jockey adjustments, allow for easy installation and integration into existing setups. With its durable construction and reliable performance, this block is an essential component for marine enthusiasts seeking efficiency and durability on the water.
Specification
| Specification | Details |
|---|---|
| Model | Harken 29mm Double Block |
| Sheave Diameter | 29 mm |
| Maximum Working Load | 400 kg (880 lbs) |
| Breaking Load | 800 kg (1760 lbs) |
| Weight | 70 g (2.5 oz) |
| Width | 50 mm (2 in) |
| Height | 60 mm (2.4 in) |
| Material | Aluminum, Delrin |
| Type | Double Block |
Delivery information
Standard delivery: 3-5 working days
Express delivery: 1-2 working days
Free delivery on orders over £100








