Ronstan Series 40 Orbit BB Triple Block w/Swivel Shackle
SKU: 33548986864

Ronstan Series 40 Orbit BB Triple Block w/Swivel Shackle

Sale price$121.01 Regular price$134.46
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Description

Ronstan Series 40 Orbit BB Triple Block w/Swivel ShackleSeries 40 Orbit BB Triple Block with Swivel Shackle The Series 40 ball bearing Orbit Blocks provides the perfect balance of strength, performance, and reliability. They offer class leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks the perfect balance of performance and

Series 40 Orbit BB Triple Block with Swivel Shackle

The Series 40 ball-bearing Orbit Blocks provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.

As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.

Series 40 Orbit Blocks are fitted with our carbon-reinforced C-Cleat for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.

Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.

High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave hub together with a triple bearing race to maintain low friction at very high loads.

Features:


  • Class-leading dynamic and static load ratings

  • Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks

  • Low friction 2-stage ball bearing system for efficient and effortless trimming

  • Soft attachment, lashing and traditional swivel shackle head options

  • Low profile and compact

  • High performance cleating

Applications


  • Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)

  • Halyard, vang and backstay applications on boats to 9m (30ft)

  • Control line applications on larger yachts

Specifications:


  • Sheave : 1-9/16 in.

  • Max. Rope : 3/8 in.

  • Pin : 5/32"

  • M.W.L.: 1320 lb.

  • B. L.: 2650 lb.

  • Weight: 5.9 oz.

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: 33548986864

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Kris
Dallas, US
★★★★★ 5
Great mount!
Great under desk NAS mount. Adjustable and sturdy, easy to install. Worked well for my Qnap TR-004 four slot DAS. I used 5/64 drill bit for the holes. Since my desk has a rear lip I reused rear stopper bit as a headphone hanger. I bend it slightly to a hook shape.
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Reviewed in the United States on May 6, 2025
B
Verified Purchase
Brian
Dallas, US
★★★★★ 5
Tucks my NAS away
Sturdy and a major space saver. Worth the money to free up valuable desk space. Held my 6 bay QNAO NAS perfectly. Highly recommend.
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Reviewed in the United States on November 28, 2025
C
Verified Purchase
Christopher Shaw
Alexandria, US
★★★★★ 5
Perfect for under-desk NAS/DAS
Worked perfectly for my TerraMaster D320 DAS
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Reviewed in the United States on January 20, 2026
P
Verified Purchase
Pedro
Carnegie, US
★★★★★ 5
Absolutely solid!
Color: Black, Style: Fixed Width
I wish they made a longer version, because it's kinda pricey to buy two... but I made it work with one I wanted a metal one that I could screw on so I didn't have to worry about it ever again... ever. It's holding everything and doing a great job at it.
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Reviewed in the United States on March 4, 2026
M
Verified Purchase
Mark Urso
Boise, US
★★★★★ 5
Got Some Work To Do!
Color: Black, Style: Adjustable Width
Inspired by a kitten, I endeavored to clean up behind my audio desk, where a maze of wires is the picture of confusion, but apparently also a wonderful place to pull and tug, nap and chew ... so I got this. Then it sat there for a week while I thought about it. Felt complicated, organizing that big wad of a mess of wires. But when I finally got to it, it wasn't too bad at all, and the difference is huge! This item fit under the back of the desk perfectly and provides a deep tray you can immediately start to run wires though. Eventually you'll get there! Good luck!
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Reviewed in the United States on November 26, 2025

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