SKU:55257
The Ronstan Series 55 Ratchet Orbit Block is designed for high-performance sailing and rigging applications, offering exceptional holding power and durability. Featuring a sophisticated NC-machined sheave with Generation 2 cross-hole geometry, this block provides up to 20:1 holding power—almost double that of typical competitors. The sheave's innovative design incorporates 12 gripping faces with straight resistance surfaces, which distribute the load evenly and reduce rope wear while drawing the line securely into the gripping area under load. The swivel head allows for unlimited rotation, providing flexibility in complex rigging setups, while the stainless steel shackle head ensures ultimate durability and compatibility with harsh environments. The auto and manual head fitting, made from grade 316 stainless steel, offers convenience and resilience for demanding sailing conditions. This compact device weighs only about 2.9 ounces and is suitable for lines up to 1/2 inch in diameter. Its high-performance cleating mechanism ensures smooth easing of sheets, making it an excellent choice for boats requiring reliable and efficient control of halyards, sheets, or other lines. The Ronstan Series 55 block is built to withstand tough marine environments, combining advanced engineering with robust materials to ensure long-lasting performance. Whether used in racing or cruising, this block delivers precision, strength, and ease of operation, making it a valuable addition to any sailing or rigging setup.
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