Ronstan Series 55 Single Swivel Orbit Block - Auto & Manual Ratchet

Gain superior control and flexibility on your sailboat with the Ronstan Series 55 Ratchet Orbit Block™. This innovative block offers unparalleled line management, featuring both automatic and manual ratchet engagement modes to suit your sailing style and conditions. Engineered for demanding marine environments, it provides exceptional holding power and smooth line handling. Enhance your sailing performance and safety today.

• Dual Ratchet Engagement: Offers both automatic engagement when load is applied and manual on/off control for versatile line management, adapting to your preferred sailing method.
• High Holding Power: Features Ronstan's Generation 2 sheave design with 12 gripping faces, providing up to 20:1 mechanical holding power to securely manage lines under load and minimize rope wear.
• Optimized Sheave Diameter: A 55mm sheave is designed for efficient performance with ropes up to 10mm in diameter.
• Robust Working Load: Rated for a Maximum Working Load (MWL) of 250kg (550lbs), ensuring reliable strength for critical sail control systems.
• Marine-Grade Materials: Constructed with a hard-anodized aluminum sheave, grade 316 stainless steel head fitting, and toughened, glass-fiber reinforced nylon cheeks for exceptional durability and corrosion resistance in harsh marine environments.
• Swivel Head Shackle: Allows for unlimited block rotation, ensuring perfect alignment, preventing line twists, and adapting to various fixing points.

Applications: Ideal for mainsail systems, spinnaker sheets, halyards, vangs, and backstays on dinghies, sportsboats, and small keel boats up to 8 meters (26 feet).