Selden BBB40 Cheek Ball Bearing Block – 40 mm

The Selden BBB40 cheek ball bearing block is designed for fixed installations on deck, mast or spars where a compact and low-profile solution is required. This type of block is mounted directly onto a surface, making it ideal for guiding lines along a controlled path.

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

The cheek block design provides a stable and secure setup, especially in applications where the load direction remains constant. Its fixed mounting eliminates unnecessary movement and increases reliability in high-load environments.

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

Key features:

• Cheek block for fixed deck or mast mounting
• Low-profile and compact design
• Stainless steel ball bearings for smooth operation
• Low friction under dynamic loads
• Secure and stable line guidance

Technical specifications:

• Sheave diameter: 40 mm
• Max line diameter: 10 mm
• Safe working load: 250 kg
• Breaking load: 500 kg
• Mounting: 2 x M5 bolts
• Weight: approx. 130 g

Applications:

• Deck-mounted control line routing
• Mast and boom line guidance
• Organised line leads in cockpits
• Dinghies and keelboats