SKU: 95533797475

Ronstan Series 40 Ratchet Orbit Block - Single - Auto - Swivel Shackle Head [RF46100]

Sale price$69.60 Regular price$77.33
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Description

Ronstan Series 40 Ratchet Orbit Block - Single - Auto - Swivel Shackle Head [RF46100]Series 40 Ratchet Orbit Block Single Auto Swivel Shackle Head Automatic Ratchet With automatic models, the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely great for rapid easing of the sheet and for gybing asymmetric spinnakers. Awesome Ratchet Block Holding Power Quite simply, Ronstan Ratchet Orbit Blocks have the highest holding power available. The sophisticated NC

Series 40 Ratchet Orbit Block™ - Single - Auto - Swivel Shackle Head

Automatic Ratchet
With automatic models, the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers.

Awesome Ratchet Block Holding Power
Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our sheave cross-hole geometry. The Series 40 delivers up to 14:1 holding power, almost double that of our nearest competititor.

The unique sheave design has 8 gripping faces which directly resist loaded line movement. Traditional designs have an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.

Simple and Secure Attachment
The Dyneema® Link is easily fitted and is retained securely by a moulded retainer clip. The flexible link can be left with one end attached to the block when fitting - no more lost shackle pins.

The system is compatible with Dyneema®/Spectra® strops, webbing and carbon connection points - much more so than steel loop tops or shackles.

Smooth Easing of Sheets
With auto models the sheet runs out smoothly and freely as soon as the ratchet mechanism disengages.

Low Profile Stand-Up Kit Allows 0™ or 90™ Alignment
Stand-up kits feature a clatter-free rubber boot. You can attach the Dyneema® link so that the block is aligned with the stand-up base or across it. It's a neat low-profile solution which allows full articulation.

Features:

  • Up to 14:1 holding power - highest available!
  • Smooth easing of sheets
  • Fully Automatic load sensing ratchet engagemen
  • Swivel shackle head for unlmited block rotation
  • Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points


Applications:
  • Dinghy mainsheet systems
  • Mainsheet fine tune systems on sportsboats & small keel boats
  • Mainsheet systems on sportsboats using RF7 mainsheet swivel cleat unit
  • Spinnaker and job sheets on dinghies - especially modern asymmetric classes
  • Control line applications on larger yachts


Materials:
  • Sheave: Hard anodised Aluminium
  • Ball Bearings: High compression strength carbon black Acetal
  • Frame/Cheeks: Toughened, glass fiber reinforced Nylon
  • Rope Link: UV stabilized, multi-strand impregnated SK75 Dyneema®


Specifications:
Sheave Ø: 40mm(1-9/16")
Max. Rope Ø: 9mm(5/16")
M.W.L.: 175kg(385lbs)
B. L.: 500kg(1,100lbs)
Weight: 44g(1.5oz)
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: 95533797475

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4.5 ★★★★★
Based on 23 reviews
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Verified Purchase
Emily R
Bozeman, US
★★★★★ 5
Nice quality for the price
Color: Tortoise Frame/Brown Lens
Love these. Better quality than I thought they might be. Fit well, look nice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
C
Verified Purchase
cmomes
Bozeman, US
★★★★★ 5
Quality for lower price than brand sunnies
Color: Beige Tortoise Frame / Brown Gradient Lens
High quality for a low price. I'm someone who always loses my sunglasses so I won't allow myself to purchase any name brands. I've had my fair share of cheap sunnies for this reason. These are probably the best "off-brand" I've tried - and I've tried a lot. They are definitely polarized and are lightweight with a good fit - some of the cheaper brands are really tight on the ears and the plastic is clearly cheaply made, making them heavier. They are also a cute style with a variety of colors available. The other thing with cheaper sunglasses is they are usually not that great to peer out of. Some of them I can't wear to drive bc they are too dark, or not dark enough for glares on the road. These are great for driving - the lens coloring is just right to see well and also feel like you're not squinting. I'm buying another pair for when I inevitably lose these!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2025
P
Verified Purchase
Porkysmom
Belleville, US
★★★★★ 5
Polarized sunglasses are just what I needed
Color: Tortoise Frame / Mirror Pink Lens
I really like these sunglasses. They are polarized and work great. They fit well and don't fall off when I bend over, which is important. They are light on my face and don't make marks or pressure on my nose. The color is perfect and they are really cute. They are a great value, well worth it. The cleaning cloth and bag to keep them in are a bonus. Very comfortable!
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Reviewed in the United States on April 13, 2026
M
Verified Purchase
Marzi
Bozeman, US
★★★★★ 5
Great price and quality
Color: Beige Tortoise Frame / Brown Gradient Lens
Glasses are comfortable and look good. Great sun coverage
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Reviewed in the United States on June 10, 2026
A
Verified Purchase
A. Calhoun
Lexington, US
★★★★★ 5
Just buy them. There is nothing not to love!
Color: Beige Tortoise Frame / Brown Gradient Lens, Color: Beige Tortoise Frame / Brown Gradient Lens
I've had these for a year or two now and came back and ordered three more. I wear these daily because they are so comfortable and cute. A lot of sunglasses give me headaches either they are too tight or too heavy, these never do. They don't catch in your hair if you put them on your head. They don't slide down your nose when you sweat or move your head. The beige tortoiseshell is the prettiest most flattering color ever. I'm a dark winter and I struggle to find cute sunglasses other than black. So many are brown warm colors the beige violet tortoiseshell is very cool and flattering for my cool toned gals. I have a pretty normal size head and these are just a hint of oversized but in a good way. I have an oval face that leans long oval or slight heart and these are seriously flattering. I have so many photos in them they always look good. I'm going to try the all plastic version too but I honestly love the thin metal arms. Just buy these it's such a good buy and brand. I literally donated other pairs because I don't wear them anymore after discovering these. I bought obviously the beige tortoiseshell, black with gold, and the cherry. Debating on the green. My only wish is more color options. I'd love more silver arm options. Thanks WMP for these!
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Reviewed in the United States on June 9, 2026

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