My Account
Shopping Cart

Ronstan RF35312 Series 30 Triple Block with Becket - Orbit Block 30mm

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

RF35312
07/13/2036 3:56 PM
Sale Price

$41.98

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Ronstan RF35312 is a high-performance 30mm triple block with becket, engineered for modern sailing rigging systems where strength-to-weight ratio is critical. This Orbit Block features three sheaves with thinner cheeks between them that reduce overall weight while effectively separating lines for tangle-free operation.

Advanced Two-Stage Bearing System:

The Orbit Block's innovative bearing design efficiently handles both static and dynamic loads throughout the entire load range. High compression grade acetal orbital ball bearings automatically migrate to loaded areas of the sheave for light to moderate loads, while a PTFE-impregnated nylon bearing with carbon fiber reinforcement shoulders larger static loads. This dual-stage system delivers smooth operation and exceptional efficiency even under significant load.

Lightweight Composite Construction:

Through extensive computer modeling, Ronstan replaced unnecessary metal components with engineered composites without compromising strength. The glass fiber reinforced nylon cheeks and head design achieve the highest working loads in their class. The hollow bearing at the center serves double-duty as a becket, further reducing weight while adding versatility. The block can be secured using the supplied loop or converted to a soft attachment using a Dyneema link (Ronstan RF9003-70, sold separately).

Key Features:

  • 30mm UV-resistant acetal sheaves compatible with 5/16" (8mm) conventional double-braid and high-tech 12-strand lines
  • Triple sheave configuration with integrated becket for complex purchase systems
  • Thinner cheeks between sheaves for weight reduction and line separation
  • Acetal ball bearings for light to moderate loads with PTFE/carbon fiber bearing for higher loads
  • Glass fiber reinforced nylon construction for exceptional strength-to-weight ratio
  • Accepts 5/32" shackle pin diameter
  • Optional soft attachment conversion with Dyneema link
  • Ideal for mainsheets, boom vangs, backstay systems, halyard tuning systems, Cunninghams, and general dinghy control lines

The RF35312 combines lightweight design with high working loads, making it an ideal solution for modern control line systems on dinghies through larger yachts where performance and weight savings both matter.

Products specifications

Diameter

5/16 Inch or 8 mm

Mount Type

Side Shackle

Type

Triple

Becket

Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

1213 Pounds

Sheave Diameter

1 3/16 Inches or 30 mm

Look forward to getting the product

Very easy.

Wilwood master cylinder was in stock, 40.00 cheaper then Summit! Shipped fast, arrived in two days, very pleased!

Okay; so far!

Fast, simple, best price and best shipping charge!!

Awsome :)

quick and easy so far, hopefully shipping will be the same.

Best price shipped on my product period. MBRP light bar for my Wrangler JK. Product shipped day after order was placed and arrived 2 business days later. Product was as advertised. Best price, fast service= return customer. Thanks

Enjoyed my time shopping

I saw nothing but good reviews and the money back guarantee, these together helped me finalize my decision to order from this site. I ordered just before the weekend started so I think it took my order a little longer to process. I was relieved to find that my order was shipped on the day I ordered it, It just took a little while for the email traffic to catch up. So far things have been good!!!

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy