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Ronstan Series 75 Core Single Foot Block

Cat.No:
7058
Sup. No.
RF74151

To order, please contact your local Mail Order Department as this item is currently out of stock online.

To order, please contact your local Special Order Delivery Department as this item is currently out of stock online.

To order, please contact us for delivery options.

Features

  • Class leading performance and sleek, contemporary styling
  • Excellent dynamic and high static load performance
  • Less than half the friction of the nearest competitor
  • Durable aluminium alloy cheek plates
  • Central hub hole can be used as a becket take-off or tie-up point
  • Only two fastener holes - minimises deck sealing considerations
  • Scalloped cheeks - allows for variations in line le

Specifications

  • Sheave Ø 75 mm
  • Max. Rope Ø 14 mm
  • Max. Cable Ø - mm
  • Pin Ø - mm
  • M.W.L. 1500 kg
  • B. L. 3000 kg
  • Weight 259 g

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 use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft).
  • General 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.
  • Hub: stainless steel

SHIPPING

All orders are shipped from our Brookvale, Sydney order fulfilment centre. Orders are normally shipped within 5 business days - most quicker!

Shipping day estimates after your order leaves our fulfilment centre in Sydney are based on Australia Post domestic delivery times:

 State   Regular
  Express
 ACT   2 - 4 business days   1 - 2 business days
 NSW   2 - 4 business days   1 - 2 business days
 NT   7 - 10 business days   3 - 4 business days
 QLD   3 - 5 business days   2 - 3 business days
 SA   4 - 6 business days   2 - 3 business days
 TAS   5 - 6 business days   2 - 3 business days
 VIC   3 - 5 business days   2 - 3 business days
 WA   6 - 9 business days   3 - 5 business days

Last updated 11/08/2022

* These delivery times are an estimate and actual delivery times may vary based on peak periods and other external factors. Bulky orders may take longer.

Shipping rates are automatically calculated based on live quotes supplied by our shipping partners. The quote takes into consideration, the bulk of your cart, where you want it delivered and if you want express or standard shipping.

Get a shipping rate estimate by adding items to your online cart. Go to the cart by clicking on the shopping cart icon located at the top right of the page. Then enter your shipping destination information into the "Estimate Shipping and Tax" section of the shopping cart summary.

International Shipping

We are currently unable to deliver online orders outside of Australia.

If you are located outside of Australia and wish to place an order offline. Please contact our Mail Order department or send us an enquiry via the orange help bubble located at the bottom right of this page.

 

RETURNS

Online purchases can be returned/exchanged within 30 days. Some exclusions do apply.

Visit our Returns Policy page for details on how you can return an item.