Selden BBB40 Triple Ball Bearing Block with Becket, Cam Cleat & Swivel – 40 mm

The Selden BBB40 triple ball bearing block with becket, cam cleat and swivel is designed for high-load, high-performance trimming systems where efficiency, control and speed are essential. This all-in-one solution combines a triple purchase block, integrated cam cleat and becket, making it ideal for compact and powerful rigging setups.

The triple sheave configuration enables advanced purchase systems (up to 6:1), significantly reducing effort under load. Each 40 mm sheave runs on stainless steel ball bearings, ensuring smooth rotation and minimal friction even in demanding conditions.

The integrated cam cleat allows fast line adjustment and secure locking without additional hardware, while the becket enables extended purchase configurations for increased mechanical advantage. The swivel shackle ensures optimal alignment under load and can be fixed or left free to rotate depending on the setup.

Constructed from glass fibre reinforced composite with an acetal bearing cage, the block offers high strength, low weight and long service life in harsh marine environments.

Key features:

• Triple block with integrated becket and cam cleat
• Suitable for purchase systems up to 6:1
• Swivel head for optimal alignment
• Stainless steel ball bearings for low friction
• Fast trimming and secure line locking

Technical specifications:

• Sheave diameter: 40 mm
• Max line diameter: 7 mm
• Safe working load: 540 kg
• Breaking load: 1080 kg
• Pin diameter: 5 mm
• Shackle diameter: 5 mm
• Weight: approx. 470 g

Applications:

• High-load mainsheet systems
• Vang and cascading systems
• Advanced trimming setups
• Performance dinghies and keelboats