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Ronstan RF46100 Series 40 Orbit Block Auto Ratchet Single Swivel Head

Manufacturer

Ronstan

<h3>About Ronstan – A Legacy Built on the Water</h3><p>Few names in the sailing world carry as much weight as Ronstan. <strong>Founded in 1953</strong> by Ron Allat and Stan Lenepveu, the company began as a small boatbuilding operation in Highett, a suburb of Melbourne, Australia. What started as handcrafting custom yacht fittings for fellow sailors at the nearby Black Rock Yacht Club steadily grew into one of the most respected sailboat hardware manufacturers on the planet. The brand name itself is a nod to its founders — Ron and Stan — whose passion for sailing and precision craftsmanship shaped the company's DNA from day one.</p><p>Today, <strong>Ronstan International</strong> is a globally recognised manufacturer and supplier of sailboat hardware, rigging components, winches, sailing gear, and accessories, with its head office remaining in Braeside, Victoria, Australia. The company has established manufacturing facilities in Australia, Denmark, and Indonesia, along with sales offices in the United States, and distributes products to sailors in over 40 countries around the world. In November 2023, Ronstan joined <strong>Groupe Wichard</strong>, aligning with an industry leader whose portfolio spans more than ten world-renowned brands in the sailing and safety markets — a move that further strengthens Ronstan's global reach and product offering.</p><h3>Engineered for Every Sailor, Proven at the Highest Levels</h3><p>Ronstan's reputation spans the full spectrum of sailing — from first-time dinghy sailors to elite competitors at the America's Cup and Olympic Games. The brand serves as the official supplier to the Australian Sailing Team, and Ronstan hardware has appeared aboard medal-winning boats across multiple Olympic campaigns. That pedigree at the pinnacle of racing directly fuels the innovation available to everyday sailors: the demanding performance requirements of top-tier competition have driven many of the technical breakthroughs found throughout Ronstan's broader product range.</p><p>The company's catalog encompasses well over 2,000 products, including pulley blocks, traveller systems, furlers, rope cleats, stainless steel fittings, shackles, snap shackles, and winches. Whether you're outfitting a small racing dinghy, a family cruiser, or an offshore race yacht, Ronstan offers hardware designed and tested to perform in real-world conditions. Their in-house capabilities span design, engineering, precision injection moulding, CNC machining, metal pressing, and assembly — all of which contribute to the consistent quality sailors have come to expect from the brand.</p><h3>Top Ronstan Product Categories</h3><p>Among Ronstan's most popular product lines are their <a href="/11561-ronstan-tiller-extensions-accessories-202641">Tiller Extensions &amp; Accessories</a>, which encompass both their renowned carbon fibre and alloy tiller extension ranges. Whether you need a lightweight, rigid fixed-length stick or a telescopic option for adjustable reach, Ronstan's tiller extensions are engineered for decisive helm response and positive grip in all conditions. Complementing these are Ronstan's <a href="/11561-ronstan-tiller-extensions-accessories-201068">Tiller Extension Accessories</a> — including universal joints, retaining clips, and end knobs — that allow sailors to fine-tune their setup or replace worn components with ease.</p><p>Ronstan also produces a well-regarded line of <a href="/11561-ronstan-fairleads-201944">Fairleads</a>, designed to guide lines smoothly across a boat's deck. Available in UV-stabilised nylon and with optional stainless steel liners for added strength and longevity, these practical fittings are a staple of both dinghy and keelboat rigging setups worldwide.</p><h3>Why Choose Ronstan?</h3><ul><li><strong>70+ years of marine hardware expertise</strong> rooted in Australian sailing culture</li><li>Products trusted by Olympic sailors, offshore racers, and cruising sailors alike</li><li>Over 2,000 products covering everything from small dinghy fittings to superyacht systems</li><li>Advanced manufacturing across three international production facilities</li><li>Part of Groupe Wichard, adding complementary product depth and global support</li></ul>

Part Number

RF46100
06/01/2036 5:39 AM
Sale Price

$71.66

In Stock (8)

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Usually delivered within 2 days

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Fitment guaranteed

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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

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