Ronstan Series 75 Core Block - 75 mm (3") - RF74110

The Ronstan Series 75 Core Block with Becket and Universal Head (RF74110) is 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 the durable package. For reliability and a 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
• Versatile trunnion snap shackle
• Provides quick & simple attachment and removal
• 360 degree relation with side-to-side articulation
• Integrated becket through the hub of the lower sheave

Applications:

• Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 14 m (46 ft.)
• Various control line applications on larger yachts
• Alloy sheave models are available for use with wire

Specifications:

• Safe working load: 3300 lbs (1500 kg)
• Breaking load: 6600 lbs (3000 kg)
• Weight: 15.1 oz. (428 g)
• Sheave diameter: 3" (75 mm)
• Maximum line size: 9/16" (14 mm)
• Materials:
  • Sheave: U.V. stabilized Acetal or anodized aluminum (AW models)
  • Cheek plates: Aluminum alloy
  • Ball bearings: High compression strength carbon black Acetal