Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing

The Series 30 Ball Bearing Block is the ultimate solution for marine enthusiasts seeking unparalleled performance and reliability. Crafted with advanced composites and precision engineering, this block ensures minimal friction and maximum strength, making it an essential component for any boating application.

Superior Strength-to-Weight Ratio

Engineered using all-composite reinforced polymer materials, the Series 30 Ball Bearing Block offers the highest strength-to-weight ratio in its class. The meticulously designed fiber-reinforced composites in the block head, cleat arms, and beckets reduce overall weight without compromising durability. This optimal design ensures smooth operation with minimal friction, enhancing the efficiency of your marine setups.

Unmatched Working Load Capacity

The Series 30 features Ronstan’s proven 2-stage bearing system, incorporating high compression grade Acetal ball bearings and a secondary full-contact bearing. This combination guarantees minimal friction across the entire working load range, allowing you to handle heavy loads with ease and confidence.

The sheave and bearing system is supported by a fiber-reinforced load frame, meticulously computer-modeled and optimized through advanced stress analysis methods. Additionally, the Dyneema® Link, made from high-spec SK75 fiber, connects the block to the load point. This material is ten times stronger and lighter than steel, providing a secure and efficient connection in multi-sheave blocks.

Versatile and Secure Attachment Options

The single becket design allows for easy lashing to any attachment point, while also accommodating Dyneema® Links and shackles for versatile attachment alternatives. The Dyneema® Link in multi-sheave blocks can be effortlessly fitted and secured with a removable pin, offering flexibility to switch between a shackle, custom lashing, or strop as needed.

Unlike traditional blocks with steel loop tops or shackles, the Series 30 is highly compatible with Dyneema®/Spectra® lines, carbon laminate connection points, and webbing, ensuring secure and efficient attachments for various marine applications.

Compact and Low-Profile Design

The two-way head in the single lashing block allows for precise alignment at 0° or 90° orientations, while the single swivel block facilitates full articulation. This flexible design ensures that the block can adapt to different angles and movements, enhancing its functionality on the water.

The use of the flexible Dyneema® Link in multi-sheave blocks connects directly to the block head, eliminating the need for an intermediate head post. This innovation reduces weight and maintains a low profile without sacrificing articulation. Additionally, the meticulously designed beckets minimize height, contributing to the block’s compact presence.

Key Features

• Lightweight construction for easy handling
• Highest working load capacity in its class
• Secure and versatile attachment options
• Low-profile and compact design
• Ultra low-profile thru-sheave becket
• Self-lubricating Nylatron® sheave and full contact bearing for handling high dynamic loads

Ideal Applications

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

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.