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Ronstan RF46100 Series 40 Orbit Block Auto Ratchet Single Swivel Head

Manufacturer

Ronstan

<h3>Ronstan: Precision Sailing Hardware Built for Every Sailor</h3><p><strong>Ronstan</strong> is one of the most respected names in sailboat hardware — and with good reason. <a href="/11561-ronstan">Ronstan</a> traces its roots back to 1953, when two Australian sailors, Ron Allatt and Stan Lenepveu, founded Ronstan Marine Equipment Pty Ltd in Melbourne, Australia. What started as a passion project supplying handcrafted yacht fittings to their local sailing club gradually grew into a global enterprise recognized for engineering excellence and real-world performance.</p><p>Today, Ronstan is headquartered in Braeside, Victoria, Australia, with international offices in the United States and Denmark, and production facilities across three continents. The brand distributes to more than 40 countries and handles upwards of 4.9 million units out of its Melbourne facility every year. In November 2023, Ronstan joined Groupe Wichard, further cementing its place among the world&apos;s most influential marine hardware groups.</p><h3>Engineering That Performs On the Water</h3><p>What sets Ronstan apart from generic marine suppliers is its deep commitment to innovation and in-house manufacturing capability. Ronstan&apos;s engineering teams — spread across Australia, the United Kingdom, and Denmark — draw on diverse sailing traditions to develop products that meet the demands of wildly different markets: from club dinghy racers to offshore bluewater cruisers. The brand&apos;s catalog spans blocks, winches, travelers, furling systems, batten systems, stainless steel rigging hardware, and a full suite of deck gear. Ronstan is also the official hardware supplier to the Australian Sailing Team.</p><p>The brand&apos;s in-house manufacturing includes precision CNC machining of aluminum, brass, and stainless steel, as well as advanced plastic injection molding using high-performance engineering polymers — including composites reinforced with up to 60% long-strand glass and carbon fiber. This vertical integration means Ronstan controls quality from design to delivery.</p><h3>Core Product Categories</h3><p>Three categories stand out as workhorses of the Ronstan lineup. <a href="/11561-ronstan-fairleads-200387">Ronstan Fairleads</a> are purpose-designed to guide, contain, and correct the lead angle of control lines across a range of deck configurations — a deceptively simple piece of hardware that plays a critical role in clean, friction-free sail handling. For securing lines under load, <a href="/11561-ronstan-cleats-200268">Ronstan Cleats</a> offer a comprehensive range spanning jam cleats, vee cleats, and the brand&apos;s well-known C-Cleat&trade; and T-Cleat&trade; cam cleat families, each engineered for reliable cleating and easy release in all conditions. Completing the rigging equation, <a href="/11561-ronstan-shackles-200937">Ronstan Shackles</a> — including the innovative Triggersnaps&trade; snap shackle range — are individually proof-load tested and designed for intuitive one-handed operation, making them a trusted choice for racers and cruisers alike.</p><h3>From Dinghies to Maxis</h3><p>One of Ronstan&apos;s most distinctive qualities is its breadth. The same brand that equips Olympic-class dinghies also supplies hardware to some of the largest and fastest offshore racing yachts in the world. Whether you&apos;re outfitting a small club boat or a serious offshore campaigner, Ronstan&apos;s catalog has a solution engineered to the right weight, load rating, and finish for the task at hand.</p>

Part Number

RF46100
09/13/2036 6:00 AM
Sale Price

$71.66

In Stock (7)

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Usually delivered within 2 days

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Product Details

The Ronstan Series 40 Ratchet Orbit Block is a high-performance sailing block featuring an automatic ratchet mechanism and swivel shackle head. The automatic ratchet engages under load for superior holding power, then disengages when load is released for smooth, free sheet easing—ideal for rapid adjustments and gybing asymmetric spinnakers.

Exceptional Holding Power:

This block delivers up to 14:1 holding power, the highest available in its class. The precision NC-machined sheave features Generation 2 cross-hole geometry with 8 gripping faces that provide direct resistance to loaded line movement. The offset resistance faces distribute load evenly and minimize rope wear while drawing the rope into the gripping area under load.

Key Features:

  • Automatic load-sensing ratchet engagement for hands-free operation
  • Swivel shackle head allows unlimited block rotation
  • Stainless steel shackle head for durability in harsh marine environments
  • Hard anodized aluminum sheave with high-strength carbon black acetal ball bearings
  • Toughened glass fiber reinforced nylon frame and cheeks
  • Low profile design with clatter-free operation

Applications:

  • Dinghy and sportsboat mainsheet systems
  • Spinnaker and jib sheets for dinghies and asymmetric classes
  • Mainsheet fine-tune systems on small keelboats
  • Control line applications on larger yachts

Specifications:

  • Sheave diameter: 40mm (1-9/16")
  • Maximum rope diameter: 9mm (5/16")
  • Maximum working load: 175kg (385 lbs)
  • Breaking load: 500kg (1,100 lbs)
  • Weight: 44g (1.5 oz)

Constructed with UV-stabilized multi-strand SK75 Dyneema rope link and compatible with Dyneema/Spectra strops, webbing, and carbon connection points.

Not only was our item cheaper, it arrived quickly. Will def. purchase from Autoplicity again! Thanks!

Was fast and easy to look for parts and order.

very easy and fast purchase but concerned as fedex requires no signature for delivery and is not careful to which house yard it leaves packages in the front of ,so far anyway.

Good so far. Just hoping the product is of quality and that it works.

good pricing

Arrived in 4 business days and cheapest price on the web for the part I got.

great

Well organized website, good aftermatket and OEM selections. One of the first search results is a good hit.

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Fantastic prices, lowest on the 'net. Easy ordering, easy pay and fast fast fast shipping. You can't go wrong!

The ordering process was simple and user friendly. The pricing was the lowest I could find for a brand new AMP Powerstep for my Ford F150. The tracking number was provided and the item is scheduled for FedEx ground delivery in 3-days.

quick and easy

good

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