Ronstan Series 75 Core Block Single With Acetal Sheave And Alloy Cheeks

Discover the unparalleled performance of the Ronstan Series 75 Core Block Single, designed specifically for sailing enthusiasts who demand reliability and efficiency. This premium block features an acetal sheave and robust alloy cheeks, making it an essential component for any sailing setup. The Series 75 Core Block is a true all-round solution, engineered to handle both high dynamic and static loads with ease.

• Tuned 2-Stage Bearing System: Experience exceptional performance across the full working load range, ensuring smooth operation in any sailing condition.
• Integrated Thrust Bearing Feature: This innovative design enhances load distribution, making the block resilient and durable under pressure.
• High-Quality Materials: Crafted from lightweight acetal and sturdy alloy, this block not only minimizes weight but also maximizes strength and longevity.
• Versatile Application: Perfect for a variety of sailing scenarios, the Series 75 Core Block is compatible with multiple rig configurations.

When compared to typical blocks in the market, the Ronstan Series 75 Core Block stands out with its unique combination of advanced engineering and high-quality materials. This block is designed for sailors who prioritize performance without compromising on weight or durability.

Upgrade your sailing experience with the Ronstan Series 75 Core Block Single. Order yours today and enjoy the benefits of superior sailing technology!

Series 75 Core Block™ - Single

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.

Universal head
The head assembly incorporates a brass bearing washer to provide smooth 360™ rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0™ or 90™.

Shackles are high quality forged grade 316 stainless steel.

Features:

• Class leading performance and sleek, contemporary styling
  
• Excellent dynamic and high static load performance
  
• Less than half the friction of the nearest competitor
  
• Universal head with full 3-axis articulation
  
• Head posts can be locked at 0 or 90 degrees, by using a 2.5mm Hex/Allen Key
  
• Central hub hole can be used as a becket take-off or tie-up point

Applications:

• Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 14M (46')
  
• Various control line applications on larger yachts

Materials:

• Sheave: U.V. stabilized Acetal
  
• Cheek body: Aluminium Alloy
  
• Ball Bearings: High compression strength carbon black Acetal
  
• Shackle, head post & hub: Grade 316 stainless steel

Specifications:
Sheave Ø: 75mm(3")
Max. Rope Ø: 14mm(9/16")
Pin Ø: 8mm(5/16")
M.W.L.: 1,500kg(3,300lbs)
B. L.: 3,000kg(6,600lbs)
Weight: 354g(12.5oz)