Ronstan Series 40 All Purpose Block - Single Cheek

Route sheets, halyards and control lines with the Ronstan Series 40 All Purpose Single Cheek Block. Suited to cruising and racing, its self-lubricating sheave handles both changing loads and high sustained loads with little maintenance.

Key features

• A self-lubricating acetal sheave runs on a polished stainless steel race to handle dynamic and static loading.
• Low-maintenance construction reduces routine upkeep for cruising and racing use.
• UV-stabilized sheaves and impact- and UV-resistant nylon cheeks help withstand exposure and knocks.
• A curved surface adapter allows mounting on masts and booms.
• Stacking capability lets you build a double arrangement or combine the block with Ronstan Series 40 deck organizers.

Specifications

• Brand: Ronstan
• Series: 40 All Purpose
• Configuration: Single cheek
• Sheave material: UV-stabilized acetal
• Cheek material: Fiber-reinforced nylon
• Bearing race material: Grade 316 stainless steel
• Cheek plate material: Alloy
• Listed applications: Mainsheet, halyard, vang and spinnaker control lines
• Listed boat types: Off-the-beach catamarans, one-design classes and sportsboats up to 8 m (26 ft)

Good to know

When blocks are stacked into a double arrangement, load on the upper sheave must not exceed 60% of the rated working load. Mast and boom mounting uses the curved surface adapter.