
Spinlock Jammer Block Jk50
The Spinlock Jammer Block JK50 is designed for reliable line holding and easy adjustments in marine applications, featuring a compact design, robust construction, and seamless operation, perfect for sails and halyard management.
Out of stock items can be ordered and shipped out within 3-5 working days
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Pickup currently unavailable at Marine Chandlery: North Shields

Spinlock Jammer Block Jk50
Marine Chandlery: North Shields
Unit G4 Narvik Way
Tyne Tunnel Trading Estate
North Shields NE29 7XJ
United Kingdom

The Spinlock Jammer Block JK50 is designed for reliable line holding and easy adjustments in marine applications, featuring a compact design, robust construction, and seamless operation, perfect for sails and halyard management.
The Spinlock Jammer Block JK50 is designed for reliable line holding and easy adjustments in marine applications, featuring a compact design, robust construction, and seamless operation, perfect for sails and halyard management.
Description
The Spinlock Jammer Block JK50 is an essential component for sailing enthusiasts and marine professionals looking for reliable and efficient control systems. Designed to accommodate a wide range of line sizes, this jammer block offers excellent holding power combined with user-friendly functionality, making it ideal for various marine applications. Constructed with high-strength materials, the JK50 features a robust design that ensures durability even under demanding conditions. The patented Ratchamatics mechanism allows for one-handed operation, enabling users to securely lock or release lines smoothly, which is particularly useful when adjusting sail trim or in mooring situations. The adjustable spring tension further enhances operational efficiency, allowing for tailored performance based on specific line loads. Ideal for use on racing sailboats, cruising yachts, and various powerboats, the Spinlock Jammer Block JK50 excels in applications requiring quick, reliable line adjustments and secure holding properties. Its compact size and lightweight design contribute to improved overall vessel performance without adding unnecessary weight to the rigging. Marine users will appreciate the lower profile of the JK50, which minimizes wind resistance and enhances the overall aesthetics of rigging while maximizing space efficiency on deck. The product is engineered to withstand harsh marine environments, showcasing excellent resistance to UV deterioration, corrosion, and environmental wear. For professionals seeking a dependable solution to manage lines and optimize sailing performance, the Spinlock Jammer Block JK50 is a superior choice that embodies quality craftsmanship and innovative design, ensuring optimal functionality in all maritime conditions.
Specification
| Product Name | Spinlock Jammer Block JK50 |
| Type | Jammer Block |
| Sheave Diameter | 50 mm |
| Maximum Line Diameter | 12 mm |
| Breaking Load | 2000 kg |
| Weight | 160 g |
| Material | Glass Reinforced Nylon and Stainless Steel |
| Minimum Working Load | 200 kg |
| Certifications | ISO 9001 |
| Application | Halyards, sheets, control lines |
Delivery information
Standard delivery: 3-5 working days
Express delivery: 1-2 working days
Free delivery on orders over £100








