Ronstan 60mm Double - RF64202
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.
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.
FeaturesClass leading performance and sleek, contemporary styling
Excellent dynamic and high static load performance
Less than half the friction of the nearest competitor
ApplicationsIdeal 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.
MaterialsSheaves: U.V. stabilised Acetal
Cheek plates & cleat arms: Aluminium alloy
Ball Bearings: High compression strength carbon black Acetal
Shackle, post & hub: Grade 316 stainless steel
Padeye & snap shackle: Grade 15-5PH stainless steel
Snap shackle: Grade 15-5PH investment cast stainless steel
Cleat: Fibre reinforced composite
Max. Rope Ø (mm): 12
Sheave Ø (mm): 60
B. L. (kg): 2000
M.W.L. (kg): 1000
Weight (g): 390