


Harken 40mm Ratchet Block Swivel
The Harken 40mm Ratchet Block Swivel features high-efficiency ratchet action, lightweight construction, and a robust swivel head, perfect for optimizing sail control and reducing line fatigue on your boat. Ideal for both racing and cruising.
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Pickup available at Marine Chandlery: North Shields
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Harken 40mm Ratchet Block Swivel
Marine Chandlery: North Shields
Unit G4 Narvik Way
Tyne Tunnel Trading Estate
North Shields NE29 7XJ
United Kingdom

The Harken 40mm Ratchet Block Swivel features high-efficiency ratchet action, lightweight construction, and a robust swivel head, perfect for optimizing sail control and reducing line fatigue on your boat. Ideal for both racing and cruising.
The Harken 40mm Ratchet Block Swivel features high-efficiency ratchet action, lightweight construction, and a robust swivel head, perfect for optimizing sail control and reducing line fatigue on your boat. Ideal for both racing and cruising.
Description
The Harken 40mm Ratchet Block Swivel is a high-performance marine accessory designed specifically for efficient sail handling and rigging applications. Built with durable materials, this block features a low-friction sheave that enhances line retrieval while minimizing wear, ensuring longevity even in challenging marine environments. One of its standout characteristics is the integrated ratchet mechanism, which provides positive holding power and mechanical advantage, allowing sailors to easily trim sails or handle loads with confidence. The 40mm diameter sheave accommodates lines up to 8mm in diameter, making it versatile for a range of applications from dinghies to larger cruising yachts. The block also includes a 360-degree swivel head, enabling smooth directional changes and preventing line twists, which can be particularly beneficial when managing complex rigging setups or during maneuvers. Its lightweight and compact design contribute to improved overall performance without adding unnecessary weight to the vessel. Installation is straightforward, thanks to the dedicated attachment points, allowing for quick integration into existing systems. This ratchet block is ideal for applications such as mainsheet systems, halyards, and other control lines where reliable performance and ease of use are paramount. With its robust construction and innovative design, the Harken 40mm Ratchet Block Swivel is an essential tool for sailors seeking enhanced control and efficiency while navigating the open water. Perfect for both competitive racing and leisure sailing, it exemplifies quality and reliability that marine enthusiasts have come to trust.
Specification
| Model | Harken 40mm Ratchet Block Swivel |
| Sheave Diameter | 40 mm |
| Maximum Line Diameter | 10 mm |
| Weight | 80 g (2.8 oz) |
| Safe Working Load (SWL) | 400 kg (880 lb) |
| Breaking Load | 800 kg (1760 lb) |
| Material | Acetal, Aluminum, Stainless Steel |
| Ball Bearings | Stainless Steel |
| Beckett Type | Swivel |
| Ratchet Mechanism | Two speeds |
| Mounting | Head or base |
| Purchase Ratio | 2:1 |
| Certifications | CE Marked |
Delivery information
Standard delivery: 3-5 working days
Express delivery: 1-2 working days
Free delivery on orders over £100








