Ronstan Series 40 Orbit RT Block w/Quin, Becket, Cleat Swivel

The Series 40 Orbit RT Block with Quin, Becket, Cleat & Swivel is meticulously engineered to deliver exceptional strength and reliability for a wide range of marine applications. Combining lightweight construction with high performance, these Orbit Blocks™ are the ideal choice for boating enthusiasts seeking top-tier rigging solutions.

Product Overview

The Series 40 Orbit RT Blocks™ are crafted from toughened, glass fiber reinforced nylon cheeks, replacing traditional stainless steel straps to offer a lightweight yet incredibly strong alternative. These blocks boast class-leading dynamic and static load ratings, making them the highest performing blocks available in their size category. Designed for versatility, the range includes single, double, and multiple sheave options, including quad and quin sheaves, allowing for complex rigging systems such as up to a 12:1 purchase mainsheet system for high-performance catamarans.

Key Features

• Superior Load Ratings: Class-leading dynamic and static load capacities ensure maximum performance and safety.
• Lightweight Construction: Toughened glass fiber reinforced nylon cheeks replace stainless steel straps, reducing weight without sacrificing strength.
• Efficient Ball Bearing System: A low friction 2-stage ball bearing system allows for smooth and effortless trimming.
• Versatile Attachment Options: Choose from soft attachment, lashing, or traditional swivel shackle head options to suit your specific rigging needs.
• Compact Design: Low profile and compact construction ensure optimal space utilization on your vessel.
• High-Performance Cleating: Integrated carbon-reinforced C-Cleat™ provides secure rope holding with minimal effort during entry and exit.

Applications

• Mainsheet Systems and Spinnaker Sheets: Perfect for dinghies, off-the-beach catamarans, and sportsboats up to 8m (26ft).
• Halyard, Vang, and Backstay: Suitable for boats up to 9m (30ft), ensuring reliable performance under high loads.
• Control Line Applications: Ideal for larger yachts requiring precise and reliable line control.

Technical Specifications

Parameter	Specification
Sheave Diameter	1-9/16 in.
Maximum Rope Diameter	5/16 in.
Pin Diameter	5/32 in.
Minimum Working Load (M.W.L.)	1,320 lb.
Breaking Load (B.L.)	2,650 lb.
Weight	13.0 oz.

Enhanced Performance with Ball Bearing Technology

The Series 40 Orbit RT Blocks™ equipped with ball bearings feature a 2-stage bearing system that minimizes friction for efficient line management. The secondary full-contact bearing maintains low friction across the entire working load range, ensuring smooth operation even under the most demanding conditions.

High Load Capacity for Demanding Applications

For applications expecting high dynamic or static loads, the High Load versions of the Series 40 Orbit RT Blocks™ are specifically designed to withstand extreme conditions. These blocks are constructed with high-strength grade 2205 stainless steel sheaves and hubs, complemented by a triple bearing race that maintains low friction even at very high loads, providing unparalleled durability and performance.

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.