Selden BBB30 Double Ball Bearing Block with Becket 30 mm

The Selden BBB30 double ball bearing block with becket (403-101-05) is designed for applications requiring increased mechanical advantage and efficient load handling.

This double block features two sheaves combined with an integrated becket, allowing compact and efficient purchase systems such as 3:1, 4:1 or higher configurations. It is ideal for setups where higher loads must be controlled with precision and minimal effort.

Equipped with stainless steel ball bearings and a glass fibre reinforced sheave, the block ensures smooth rotation and minimal friction, even under dynamic loads and frequent adjustments.

Part of the Selden BBB30 series, this block is designed for higher loads than the BBB20 range and is suitable for both dinghies and small keelboats.

Key features

• Double block with integrated becket
• Sheave diameter: 30 mm
• Maximum line diameter: 8 mm
• Safe working load: 400 kg
• Breaking load: 800 kg
• Weight: approx. 50–52 g
• Suitable for purchase systems (3:1 / 4:1 / cascade systems)

Construction & materials

• Stainless steel ball bearings for minimal friction
• Stainless steel bearing races for durability under load
• Glass fibre reinforced sheaves for strength
• Composite housing (glass fibre reinforced polyamide)
• Acetal bearing cage to reduce friction and weight

Applications on board

• High-load purchase systems
• Vang, cunningham and outhaul systems
• Sheets and trimming systems
• Cascade systems for increased mechanical advantage
• Dinghies and small sailing yachts

This block is ideal for sailors who need a compact and powerful solution to handle higher loads with smooth, efficient control.