Ronstan, Series 55 Orbit Block™, Triple Link Head, RF55301

Description

The Ronstan Series 55 Orbit Block™ with Triple Link Head is designed for lightweight performance. Utilizing a unique orbital design, the bearing is positioned only in the active areas of the floating sheave, minimizing the mass of inactive components. This design reduces weight and bulk across different block configurations. The ball bearing single and becket block features a through-sheave becket arrangement, achieving the lowest possible weight. Multi-sheave blocks have single intermediate cheeks and an ultra-light head arrangement, offering a 30% weight saving over competitors.

With the highest working load in its class, the orbital ball-bearing system maximizes load performance with a large bearing race diameter. The Ronstan 2-stage bearing system includes high compression grade acetal ball bearings and a secondary full-contact bearing, minimizing friction across the working load range. Supported by a fiber-reinforced load frame, the design is stress-optimized. The Dyneema® Link, made from FSE Robline SK75 fiber, is 10 times stronger and lighter than steel, providing a secure connection from the block.

Features include ultra-lightweight construction, a low friction 2-stage orbital ball bearing system, and high performance cleating. The Dyneema® Link head is easily fitted and securely retained. Single inner cheeks ensure minimum weight and compactness.

Specifications

• B.L. (kg): 2000
• M.W.L. (kg): 1000
• Max. Rope diameter (mm): 10
• Notes: Replacement Link: RF9005-10. Replacement Retainer Clip: RF5003
• Sheave diameter (mm): 55mm
• Type of Block: Triple
• Weight (g): 205