Ronstan Series 60 Core Double Block - 60 mm (2 3/8") - RF64202

Core Blocks are a true all-around solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete this durable package. For reliability and long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

Features:

• Class leading performance and sleek, contemporary styling
• Excellent dynamic and high static load performance
• Less than half the friction of the nearest competitor
• Durable aluminum alloy cheek plates
• Central hub hole can be used as a becket take-off or tie-up point
• Removable threaded pin at shackle head

Specifications:

• Safe working load: 2200 lbs (1000 kg)
• Breaking load: 4410 lbs (2000 kg)
• Weight: 13.8 oz. (390g)
• Sheave diameter: 2 3/8" (60 mm)
• Maximum line size: 1/2" (12 mm)

Materials:

• UV stabilized Acetal or anodized aluminum sheave (AW models)
• Aluminum alloy cheek plates
• High-compression strength carbon black Acetal ball bearings
• Grade 316 stainless steel shackle and hub
• 2205 Stainless steel pin

Universal Bearing

• Dynamic and high static load performance
• Proven 2-stage bearing system
  • Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction
  • Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low-friction performance
  • Bearings act as a thrust bearing between the sheave and cheeks, preventing the sheave from causing friction when the line lead in and out of the block isn't perfect

Alloy Cheek Plates

• Block cheeks are manufactured from the highest quality alloy for maximum strength
• Material optimization and cut-away design minimize weight and allow easy freshwater rinsing of salt and debris from bearings
• Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave to minimize rope wear.