Lewmar 30mm Control Block - Vertical Lead

Lewmar 30mm Control Block - Vertical Lead

The Lewmar 30mm Control Block – Vertical Lead is a high-performance, ball bearing sailing block engineered for lightweight efficiency and reliable load-bearing capacity in hand-held and control line applications. Part of Lewmar's Synchro Control Block range, this vertical lead configuration is ideal for sailors seeking a compact, low-friction block that keeps running rigging organized and operating smoothly.

The block is constructed using MRT (Metal Replacement Technology), combining a stainless steel central race and stainless steel balls to provide a meaningful weight advantage over traditional metal components. The cheeks are formed with Long Fibre Technology, delivering exceptional tensile strength and impact resistance while keeping overall mass to a minimum. The open-body design allows water, sand, and salt to be flushed out easily, reducing maintenance demands and extending service life in harsh marine environments.

With a 30mm sheave diameter and a safe working load of 200 kg (440 lbs), the block handles medium and dynamic loads encountered across a wide variety of sailboat applications. The block accepts line up to 8mm (5/16") in diameter and tips the scale at just 48g (1.69 oz), making it one of the lightest options available at this load rating.

Key Features

• 30mm sheave diameter accommodates line up to 8mm (5/16")
• Safe working load: 200 kg (440 lbs); breaking strength: 480 kg
• MRT (Metal Replacement Technology) construction with stainless steel race and balls
• Long Fibre Technology cheeks for exceptional strength and durability
• Ball bearing sheave for higher efficiency, reduced friction, and less rope wear
• Open design allows easy flushing of sand and salt
• Extremely lightweight at 48g (1.69 oz)
• Impact resistant construction
• Optimized for hand control applications
• Suitable for control lines, mainsail sheets, spinnaker sheets, barber haulers, and genoa sheets on dinghies and keelboats