My Account
Shopping Cart

Ronstan RF48510 Series 40 Orbit Ball Bearing Quintuple Block with Becket and Swivel Shackle

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

RF48510
06/21/2036 10:38 AM
Sale Price

$171.42

4 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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 Series 40 Orbit Ball Bearing Quintuple Block with Becket and Swivel Shackle delivers exceptional performance for high-demand sailing applications. This five-sheave block provides class-leading dynamic and static load ratings, offering the highest strength available in this size category while maintaining a lightweight, compact profile.

Key Features:

  • Five-sheave configuration with ball bearing system for maximum mechanical advantage and smooth operation
  • Toughened glass fiber reinforced nylon cheeks replace traditional stainless steel straps for superior strength-to-weight ratio
  • Advanced 2-stage ball bearing system minimizes friction across the full working load range
  • Integrated carbon-reinforced C-Cleat with adjustable stainless steel arms for secure rope holding
  • Swivel shackle head with becket attachment point for versatile rigging configurations
  • Low-profile design with integrated fairleads for fast action from any angle
  • Maximum working load of 1,320 lbs with breaking load of 2,650 lbs

Technical Specifications:

  • Sheave diameter: 1-9/16 inches (40mm)
  • Maximum rope diameter: 3/8 inch
  • Pin diameter: 5/32 inch
  • Weight: 8.7 oz (0.54 lbs)

Ideal Applications:

  • Mainsheet and spinnaker sheet systems on dinghies, performance catamarans, and sportsboats up to 26 feet
  • Halyard, vang, and backstay applications on vessels up to 30 feet
  • High-ratio purchase systems including 12:1 configurations
  • Control line applications on larger yachts requiring efficient load management

The quintuple sheave design makes this block ideal for creating powerful purchase systems while the ball bearing construction ensures effortless trimming even under high loads. The becket and swivel shackle combination provides maximum rigging flexibility for complex systems.

great

Nice webpage, easy to negotiate. Thank you for your help!

Got the part but I haven't installed it yet.

Overall doing business with autoplicity was very good. I would buy from autoplicity in the feature.

very 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