Selden BBB40 Single Ball Bearing Block with Cam Cleat & Swivel – 40 mm

The Selden BBB40 single ball bearing block with cam cleat and swivel is designed for applications where quick adjustment and secure line locking are essential. The integrated cam cleat allows for fast trimming without additional hardware, making it ideal for active sailing setups.

The 40 mm sheave runs on stainless steel ball bearings, ensuring smooth rotation and minimal friction even under dynamic loads. This improves trimming precision and reduces effort when handling control lines.

The swivel head ensures optimal alignment under load, while the adjustable cam cleat arm can be positioned for ergonomic handling. A washer system allows the shackle to be fixed at 0° or 90°, or to rotate freely depending on the setup.

Built from glass fibre reinforced composite with an acetal bearing cage, the block offers high strength, low weight and long-term durability in demanding marine environments.

Key features:

• Single block with integrated cam cleat
• Swivel head for optimal alignment
• Fast trimming and secure line locking
• Stainless steel ball bearings for smooth operation
• Adjustable cleat angle for ergonomic use

Technical specifications:

• Sheave diameter: 40 mm
• Max line diameter: 7 mm
• Safe working load: 90 kg
• Breaking load: 180 kg
• Weight: approx. 124 g

Applications:

• Mainsheet systems with cleating
• Control lines requiring fast adjustment
• Vang and Cunningham systems
• Dinghies and performance keelboats