Ronstan RF48210 Series 40 Orbit Ball Bearing Double Block with Becket and Swivel Shackle

The Ronstan RF48210 is a Series 40 Orbit ball bearing double block featuring a becket and swivel shackle head, designed for sailors who demand maximum performance and reliability. This high-performance block delivers class-leading dynamic and static load ratings in a lightweight, compact package that's perfect for dinghies, catamarans, and sportsboats.

Advanced Ball Bearing System:

Ronstan's innovative 2-stage bearing system uses ball bearings to minimize friction during normal operation, plus a secondary full-contact bearing that maintains low friction even under maximum working loads. This ensures efficient and effortless trimming across the entire load range.

Key Features:

• Double sheave configuration with becket and swivel shackle for versatile rigging options
• Toughened glass fiber reinforced nylon cheeks replace traditional stainless steel straps for weight savings without sacrificing strength
• Carbon-reinforced C-Cleat with adjustable stainless steel arms for secure rope holding with low entry and exit effort
• Integrated fairleads allow fast rope action from any angle
• Low profile and compact design
• Maximum working load of 1,320 lbs with breaking load of 2,650 lbs

Technical Specifications:

• Sheave Diameter: 1-9/16 inches
• Maximum Rope Diameter: 3/8 inch
• Pin Diameter: 5/32 inch
• Maximum Working Load: 1,320 lbs
• Breaking Load: 2,650 lbs
• Weight: 4.6 oz (0.29 lbs)

Recommended Applications:

• Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans, and sportsboats up to 26 feet
• Halyard, vang, and backstay applications on boats up to 30 feet
• Control line applications on larger yachts

The Series 40 Orbit Block range is highly versatile, allowing sailors to configure multiple purchase systems including up to 12:1 mainsheet systems for high-performance sailing applications.