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Ronstan RF35202 Series 30 Double Block with Ball Bearing Orbit System

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

RF35202
08/02/2036 3:30 PM
Sale Price

$29.72

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Product Details

The Ronstan Series 30 Orbit Block Double delivers exceptional strength-to-weight performance for modern sailboat rigging systems. Engineered through extensive computer modeling, this 30mm double block replaces traditional metal components with high-strength composites, achieving one of the highest strength-to-weight ratios in its class without compromising durability.

Advanced Two-Stage Bearing System:

  • High compression acetal orbital ball bearings migrate to loaded areas of the sheave for smooth operation under light to moderate loads
  • PTFE-impregnated nylon bearing with carbon fiber reinforcement handles higher static loads efficiently
  • UV-resistant acetal sheave compatible with conventional double-braid and high-tech 12-strand lines

Lightweight Construction:

  • Glass fiber reinforced nylon cheeks and head design reduce weight while maintaining strength
  • Thinner cheeks between sheaves separate lines effectively while minimizing weight
  • Hollow bearing at sheave center serves as integrated becket for added versatility
  • Can be converted to soft attachment using Dyneema link (Ronstan RF9003-70 sold separately)

Ideal Applications:

  • 2:1 jib sheet systems
  • Boom vangs and backstay systems
  • Halyard tuning systems and mainsheets
  • General dinghy control lines using wire and rope

Specifications:

  • Sheave diameter: 30mm
  • Maximum line size: 5/16" (8mm)
  • Shackle pin diameter: 5/32"
  • Attachment options: Supplied loop or soft attachment conversion

Designed for dinghies through larger yachts, the RF35202 double block provides smooth, efficient performance under varying load conditions while keeping weight to a minimum.

Products specifications

Type

Double

Diameter

5/16 Inch or 8 mm

Mount Type

Side Shackle

Becket

No Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

992 Pounds

Sheave Diameter

1 3/16 Inches or 30 mm

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