SKU: 35826833493

Ronstan Series 45 Core Block - Single - Swivel Shackle Head

Sale price$64.48 Regular price$71.64
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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

Ronstan Series 45 Core Block - Single - Swivel Shackle HeadSeries 45 Core Block Single Swivel Shackle Head 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,

Series 45 Core Block™ - Single - Swivel Shackle Head

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.

Features:

  • High dynamic and static load capacity
  • Efficient 2-stage bearing system
  • Ball bearings to counteract side thrust loads
  • Class leading performance and sleek, contemporary styling
  • Durable aluminium alloy cheek plates
  • 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 10M (33')
  • Various control line applications on larger yachts
  • Alloy sheave models are available for use with wire


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: 45mm(1-3/4")
Max. Rope Ø: 12mm(1/2")
Pin Ø: 5mm(3/16")
M.W.L.: 700kg(1,540lbs)
B. L.: 1,400kg(3,090lbs)
Weight: 104g(3.6oz)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35826833493

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4.4 ★★★★★
Based on 15 reviews
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J
Verified Purchase
Judy L.
Natrona Heights, US
★★★★★ 5
So cute and dressy. Fit well and bought 1/2 size smaller than usual.
I usually wear sneakers and wanted shoes that were a bit dressier for going out for dinner with my husband. I usually wear a size 7 but bought these in a size 6 1/2 as recommended. I tried them on with bulky wool blend socks that I normally wear, and they fit perfectly. Since I intend to use these boots for dress, I didn't wear them for a long period of time, but found them to be comfortable, and the heal was not too high. The top of the boot is high enough, that it would still be covered by pant legs when you sit down. I also like that the zipper opening in the side made them very easy to get on and the zipper worked very well without sticking. I also like the stacked heal vs. a higher, thinner heal. Although I used to wear 3" spike heals when I was younger, I am now 77 years old, I am more comfortable and feel safer with a thicker heal. Overall, I very much like these ankle boots, and would recommend them. I hope this review is helpful for you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2024
D
Verified Purchase
DD
Belleville, US
★★★★★ 5
Amazing boots!
These boys are gorgeous visually, then when you put them on you can feel the cushioning inside. So comfortable! There is plenty of room in the width, I take a 7 and it for perfectly without being tight with sock on. Outside feels so soft to touch, can't believe quality for the price!
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Reviewed in the United States on October 14, 2023
J
Verified Purchase
Julie
New York, US
★★★★★ 4
Comfortable and well made, but the white color is off
Size: 8, Color: Sand
I've owned the microsuede sand boots for over and year and they're very comfortable. I don't wear them a ton, just for a few hours here and there to church. But after a year they have no scratches or nicks, they've held up well. I just ordered them in white. They are beautiful boots, but they're not a true white. They're more of an off white. Also - be aware - they are designed with little squares all over them that are hard to see in the pictures - you have to look at them in the 3D view to see them. I liked the pattern and the look of the boots, I just wasn't happy with the color. I'm so disappointed - I returned them.
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Reviewed in the United States on December 30, 2023
C
Verified Purchase
CB
Bozeman, US
★★★★★ 5
Surprisingly wide enough
Size: 9, Color: Black
Was surprised that they're wide enough. Usually, shoes that say they're wide, aren't really wide. They're very cute and "hopefully" when I do wear them out, they'll continue to stay comfortable. I ordered both the Coffee Bean and Black, size 9. Usually wear a 9 or 9 1/2, the fit has plenty of room in the toe area with size 9.
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Reviewed in the United States on December 2, 2023
A
Verified Purchase
Ashley Smith
Draper, US
★★★★★ 5
A wardrobe staple!
Excellent quality for the price.
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Reviewed in the United States on January 3, 2026

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