Core Blocks™ are a true all round 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.

Applications:
Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14 m (46 ft), cheek plates: aluminium alloy, ball bearings: high compression strength carbon black acetal, shackle, post & hub: grade 316 stainless steel.

Our Part # RONRF74108A | Ronstan Part # RF74108A

Features:

• Class leading performance and sleek, contemporary styling
• Excellent dynamic and high static load performance
• Less than half the friction of the nearest competitor
• Suits attachment to 14mm (9/16 in) wide mast collar post
• Removable 8mm (5/16 in) clevis pin at head
• Central hub hole can be used as a becket take-off or tie-up point
• Full block rated load can only be achieved with uniformly distributed load cross full Length: of clevis pin ie. 14mm (9/16 in) diameter mast collar post of 14mm (9/16 in)wide mast collar plate/tang