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Ronstan RF48140 Series 40 Orbit Ball Bearing Single Stand-Up Block

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

RF48140
06/21/2036 6:31 AM
Sale Price

$36.78

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Product Details

The Ronstan Series 40 Orbit Ball Bearing Single Stand-Up Block delivers professional-grade performance for sailboats up to 30 feet. This high-performance marine block combines class-leading load ratings with lightweight construction, making it ideal for mainsheet systems, halyards, and control lines where reliability matters most.

Key Features:

  • Low-friction 2-stage ball bearing system for smooth, effortless trimming and line handling
  • Lightweight toughened glass fiber reinforced nylon cheeks replace traditional stainless steel straps while maintaining exceptional strength
  • Carbon-reinforced C-Cleat for secure rope holding with easy entry and exit from any angle
  • Adjustable stainless steel cleat arms allow customization of cleating angle
  • Integrated fairleads enable fast action and smooth rope flow
  • Low profile, compact design for versatile installation
  • Class-leading dynamic and static load ratings for maximum reliability

Primary Applications:

  • Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans, and sportsboats to 26 feet
  • Halyard, vang, and backstay applications on boats to 30 feet
  • Control line applications on larger yachts

Technical Specifications:

  • Sheave Diameter: 1-9/16 inches (40mm)
  • Maximum Rope Diameter: 3/8 inch
  • Maximum Working Load: 880 lbs
  • Breaking Load: 1,760 lbs
  • Weight: 2.5 oz
  • Configuration: Single sheave, stand-up block with integrated cleat
  • Bearing Type: 2-stage ball bearing system

The Series 40 Orbit Blocks are part of Ronstan's versatile rigging system, offering the perfect balance of strength, performance, and reliability for demanding marine applications.

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