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Ronstan Series 55 Double Becket Swivel Block
The Ronstan Series 55 BB Orbit Block is designed for exceptional lightweight performance, making it the ideal choice for sailors looking to minimize weight without compromising on strength. The innovative orbital design ensures that the bearing operates only in the active areas of the floating sheave, significantly reducing mass and bulk.
With configurations that feature a through-sheave becket arrangement, this block optimizes weight reduction and efficiency. Multi-sheave blocks utilize a single cheek structure for a low-profile design, achieving a remarkable 30% weight-saving advantage over competitors.
The robust orbital ball-bearing setup maximizes load performance by offering a larger bearing race diameter. The Ronstan 2-stage bearing system incorporates high-grade acetal ball bearings and a secondary full-contact bearing for minimal friction across the working load range. Additionally, the fiber-reinforced load frame is stress-optimized for durability, while the Dyneema® Link, made from advanced SK75 fiber, provides a secure connection that is ten times stronger and lighter than steel.
Ronstan RF55210 Series 55 Double Becket Swivel Block
