Ball Bearing

RF64523

Series 60 Core Block™, Fiddle with Cleat and Snap Shackle

Fiddle block with adjustable cleat and trunnion snap shackle attachment

FEATURES

Class leading performance and sleek, contemporary styling.

Excellent dynamic and high static load performance.

Less than half the friction of the nearest competitor.

Adjustable cleating angle.

Fitted with high performance C-Cleat™ and fairlead for secure and easy cleating.

Versatile trunnion snap shackle.

360 degree rotation with side-to-side articulation.

Integrated becket through the hub of the lower sheave, max. line 11.5mm.

Specifications

Product Specifications
Max. Rope diameter (in)1/2
M.W.L. (lb)1155
Sheave diameter (in)2 3/8 + 1 3/16
B.L. (lb)4410***
Weight (oz)19
$359.00

Product Information

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.
 
Universal Bearing
Dynamic and high static load performance

The Ronstan Universal Bearing incorporates our 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.

Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.

Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings.  Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear.

High performance cleating
The Ronstan Series 60 Core Block™ feature strong, lightweight fibre-reinforced cleat arms. They have a wide range of adjustment and calibration marks, perfect for selecting your preferred cleating angle settings. The race-proven carbon-fibre reinforced Ronstan C-Cleat™ give secure rope holding with low entry and exit efforts, and are fitted with fairleads for fast action from any angle.

Technical Information

Applications

  • Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 11m (36ft).
  • Various control line applications on larger yachts.
  • Alloy sheave models are available for use with wire.
  • Ideal for creating simple vang and mainsheet systems up to 4:1 on boats to 12m (40ft)

 

Materials

  • Sheaves: U.V. stabilised Acetal
  • Cheek plates & cleat arms: Aluminium alloy
  • Ball Bearings: High compression strength Acetal
  • Shackle post & hub: Grade 316 stainless steel
  • Snap shackle: Grade 15-5PH investment cast stainless steel
  • Cleat: Fibre reinforced composite.

 

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