Selden RBB60 Double Roller Bearing Block – 60 mm

The Selden RBB60 Double Roller Bearing Block (406-201-05) is engineered for high-load, dynamic sailing applications where efficient power transfer and reliability are essential. Featuring a double sheave configuration, this block provides increased purchase, making it ideal for mainsheet systems, cascades, and other load-intensive setups.

Constructed from machined black anodized aluminium, the block combines strength with lightweight performance. It is equipped with Torlon® roller bearings for ultra-low friction and acetal thrust bearings that stabilize the sheaves under side loads, ensuring smooth operation under pressure.

The swivel shackle (Ø6 mm body, Ø8 mm pin) is hollow and chamfered to reduce weight while maintaining maximum strength. The double configuration allows for a 4:1 purchase, improving control and efficiency in trimming systems.

Key specifications:

• Sheave diameter: 60 mm
• Safe working load: 1500 kg
• Breaking load: 3000 kg
• Maximum line diameter: 12 mm
• Purchase: 4:1
• Weight: approx. 345 g
• Pin diameter: 8 mm
• Shackle diameter: 6 mm

Designed for performance sailors, the Selden RBB60 range delivers smooth trimming, fast response, and long-term durability in all conditions.