Selden BBB30 Single Ball Bearing Through-Deck Block – 30 mm

The Selden BBB30 single ball bearing through-deck block is designed for clean and efficient line routing through the deck or cockpit coaming. This low-profile solution minimizes clutter on deck while ensuring smooth and controlled line handling.

The 30 mm sheave runs on stainless steel ball bearings, delivering low friction and consistent performance under dynamic loads. This makes it particularly suitable for control lines that require smooth operation and minimal resistance.

The block is mounted flush using two M5 fasteners, providing a secure and stable installation. Its compact design reduces snagging risks and improves deck safety.

Constructed from glass fibre reinforced composite with an acetal bearing cage, the block offers high strength, low weight and excellent durability. The bearing system minimizes internal friction and reduces wear over time.

Key features:

• Through-deck block for flush mounting
• Ideal for guiding lines through deck or coaming
• Stainless steel ball bearings for smooth rotation
• Low friction under dynamic loads
• Compact, low-profile design

Technical specifications:

• Sheave diameter: 30 mm
• Max line diameter: 8 mm
• Safe working load: 200 kg
• Breaking load: 400 kg
• Mounting: 2 x M5
• Weight: approx. 28 g

Applications:

• Deck and cockpit line routing
• Control lines and trimming systems
• Cunningham and outhaul setups
• Dinghies and small keelboats