Selden PBB40 Single Block – 40 mm Plain Bearing Block for Medium Loads

The Selden PBB40 Single Block (404-001-01) is a strong and reliable plain bearing block designed for medium-load applications on sailing yachts. With its 40 mm sheave, it provides an efficient solution for control lines where durability and simplicity are key.

This block is particularly suited for static or moderately loaded systems such as halyards, sheets, and trimming lines. The plain bearing construction ensures consistent performance with minimal maintenance, making it ideal for onboard setups where reliability is essential.

The sheave is manufactured from durable acetal, while the cheeks are reinforced with glass fibre to prevent line jamming and ensure smooth operation under load.

Built with high-quality composite materials and marine-grade components, the block offers excellent strength-to-weight ratio and corrosion resistance in harsh marine environments.

Key features:

• Plain bearing block for medium-load applications
• Low-maintenance and reliable operation
• Acetal sheave for smooth line handling
• Glass fibre reinforced cheeks to prevent jamming
• Strong composite construction
• Corrosion-resistant materials
• Suitable for static and dynamic loads

Technical specifications:

• Sheave diameter: 40 mm
• Maximum rope diameter: 8 mm
• Safe working load: 350 kg
• Breaking load: 700 kg
• Weight: approx. 70–72 g
• Type: Single plain bearing block
• System: Selden PBB40

Applications:

• Halyard systems
• Mainsheet and control lines
• Boom vang systems
• Dinghy and keelboat rigging
• General onboard line management

A dependable choice for sailors looking for a strong, simple, and maintenance-free block for everyday use.