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Ronstan Series 75 Core Block, Foot
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Ronstan

Ronstan Series 75 Core Block, Foot

Code: RONRF74151
Price: $119.95

Currency:



 

Features:
Class leading performance and sleek, contemporary styling
Excellent dynamic and high static load performance
Less than half the friction of the nearest competitor
Removable becket pin for fitting of pre-spliced lines
** Line load through cleat not to exceed 175kg (385lb)

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. Applications
Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 12m (40ft).
Various control line applications on larger yachts.
Alloy sheave models are available for use with wire.

Materials:
Sheave: U.V. stabilised Acetal or anodised aluminium (AW models)
Cheek plates: Aluminium alloy
Ball Bearings: High compression strength carbon black Acetal





Specifications
Imperial Metric
Sheave Dia. 3" 75 mm
Max. Rope Dia. 9/16" 14 mm
Maximun Working Load 3300 lb 1500 kg
Breaking Load 6600 lb 3000 kg
Weight 9.2 oz 259 g

Suits 2 x 10 mm (3/8") screws (not inc.)
Product Description

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.

• Class leading performance and sleek, contemporary styling.
• Excellent dynamic and high static load performance.
• Less than half the friction of the nearest competitor.
• Central hub hole can be used as a becket take-off or tie-up point.
• Universal head with full 3-axis articulation.
• Shackle head lockable at 0 or 90 degrees.
• Alloy Rope/Wire sheave version also available.
• Sheave: U.V. stabilised acetal or anodised aluminium (AW models).
• Cheek plates: Aluminium alloy.
• Ball Bearings: High compression strength carbon black acetal.
• Shackle, post & hub: Grade 316 stainless steel.

Applications:
Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14 m (46 ft), general applications on larger yachts, alloy sheave models are available for use with wire.

Part Number: RF74151





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