Description

Improve sailing control and line-handling efficiency with the Lewmar Synchro Double Block with Becket, designed for smooth, reliable performance on racing yachts and high-performance cruising boats. Featuring a twin-sheave design and an integrated becket, this marine sailing block supports compact control-line systems, purchase arrangements and fine-tuning applications.

Lewmar’s advanced Synchro technology combines optimised block geometry, a Free-Spin bearing and a self-aligning head to reduce friction and deliver smooth rope movement under load. The swivel head can also be configured for swivelling or fixed-shackle use, providing flexibility for different rigging setups.

Constructed with a stainless-steel strap and glass-fibre-reinforced side plates, the Lewmar Synchro Double Block with Becket is built for dependable use in demanding marine environments.

Key Features and Benefits

• Double-sheave design: Helps create compact, efficient sailing control and purchase systems.
• Integrated becket: Provides an additional rope attachment point for cascades and fine-tuning arrangements.
• Low-friction performance: Free-Spin bearing technology supports smooth and responsive line handling.
• Self-aligning swivel head: Helps the block align with the direction of the rope and can be configured for swivelling or fixed-shackle use.
• Marine-grade construction: Stainless-steel strap provides strength and durability.
• Reinforced side plates: Glass-fibre-reinforced cheeks help prevent ropes from becoming wedged.
• Versatile applications: Suitable for mainsheet systems, halyard tuning, boom vang arrangements and other sailing control lines.

Technical Specifications

• Brand: Lewmar
• Product range: Synchro
• Block type: Double block with becket
• Part number: 29925005BK (50 mm version)
• Sheave diameter: 50 mm
• Working load limit: 450 kg
• Optimum rope diameter: 6 mm
• Maximum rope diameter: 10 mm
• Weight: 164 g
• Colour: Black
• Construction: Stainless-steel strap and glass-fibre-reinforced side plates
• Bearing technology: Free-Spin bearing
• Head configuration: Swivel, configurable for fixed-shackle use