Ronstan RF35109HL Series 30 Ball Bearing Block Single Becket Lashing

The Ronstan Series 30 Ball Bearing Block with single becket and lashing option delivers exceptional strength-to-weight performance through advanced composite construction. This high-performance sailing block features precision-engineered ball bearings and reinforced polymer materials for maximum efficiency with minimum weight.

Key Features:

• 2-stage bearing system with high compression Acetal ball bearings and full-contact secondary bearing for minimum friction across the full working load range
• Fiber-reinforced composite construction in block head, cleat arms, and becket for optimal weight reduction
• Ultra-low profile thru-sheave becket design minimizes overall height
• Two-way head allows alignment at 0° or 90° orientation for versatile rigging options
• Self-lubricating Nylatron sheave provides durability and smooth operation under high dynamic loads
• Compatible with Dyneema/Spectra lines, carbon laminate connection points, and webbing
• Easily lashed to attachment points or accepts Dyneema Links and shackles
• Highest working load capacity in its class

Applications:

• Mainsheet and spinnaker sheet systems on dinghies up to 5M (16')
• Halyard, vang, and backstay applications on boats up to 5M (16')
• Control line systems on larger yachts

The computer-modeled load frame is optimized using advanced stress analysis methods to ensure reliable performance in demanding sailing conditions. The becket option provides a convenient attachment point for additional line control.