Selden RBB80 Stand-Up Block with Becket – 80 mm Roller Bearing Block High Load

The Selden RBB80 Stand-Up Block with Becket (408-201-06) is a high-performance block designed for deck-mounted applications where alignment, stability, and mechanical advantage are essential.

This stand-up configuration keeps the block in an optimal upright position using a spring base, ensuring consistent alignment with the load and preventing twisting or misalignment during operation. Combined with an integrated becket, this block is ideal for purchase systems and cascades requiring a fixed dead-end attachment.

Featuring an 80 mm sheave and Torlon® roller bearings, the block delivers extremely low friction under high dynamic loads, allowing smooth trimming and efficient load transfer. The sheave is stabilised by acetal ball bearings, ensuring reliable performance even under side loads.

Manufactured from precision-machined, black anodised aluminium, the block offers excellent corrosion resistance. Insulating polymer washers prevent galvanic corrosion between stainless steel and aluminium components, ensuring long service life in marine environments.

Key features:

• Stand-up block with spring base for optimal alignment
• Integrated becket for fixed line attachment
• Very low friction under high dynamic loads
• Torlon® roller bearings for maximum efficiency
• Acetal ball bearings for side-load stability
• Black anodised aluminium construction
• Insulated components to prevent galvanic corrosion
• Designed for high-load deck applications

Technical specifications:

• Sheave diameter: 80 mm
• Maximum rope diameter: 14 mm
• Safe working load: 2500 kg
• Breaking load: 5000 kg
• Weight: approx. 755 g
• Type: Stand-up single block with becket
• System: Selden RBB80

Applications:

• Mainsheet purchase systems
• Backstay cascades
• Vang and kicker systems
• Deck-mounted control lines
• High-load trimming systems on cruising and racing yachts

A robust solution for sailors who require stable alignment, mechanical advantage, and reliable performance under load.