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Description
Ronstan RF55111 Series 55 Orbit Single Block with BecketRonstan RF55111 Orbit Block with becket. Designed for applications where weight is of paramount importance. The securing loop is easily changed and we suggest that you use either a forged eye or shackle to secure the block as pressed steel fittings can be sharp and will prematurely wear the rope mounting. General Range Information: Ultra Lightweight Low friction 2 stage Orbital ball bearing system Highest working load in its class Easily fitted and
Ronstan RF55111 Orbit Block with becket. Designed for applications where weight is of paramount importance. The securing loop is easily changed and we suggest that you use either a forged eye or shackle to secure the block as pressed steel fittings can be sharp and will prematurely wear the rope mounting.
General Range Information:
- Ultra Lightweight
- Low friction 2-stage Orbital ball bearing system
- Highest working load in its class
- Easily fitted and securely retained Dyneema Link head
- Low profile and compact
- High performance cleating
- Sheave Diameter 55mm
Technical:
- Sheave Diameter 55mm
- Maximum Rope Diameter 10mm
- Maximum Working Load 500kg
- Breaking Load 1000kg
- Weight 75g
Materials:
- Ball bearings - High compression strength carbon black Acetal
- Stage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon
- Frame/Cheeks - Toughened, glass fibre reinforced Nylon
- Rope Link: UV stabilised, multi-strand impregmented SK75 Dyneema
Applications:
- Mainsheet systems on dinghies, sportsboats and small keelboats to 9m (30ft)
- Spinnaker sheets on dinghies, sportsboats and small keel boats to 9m (30ft)
- Halyard, Vang and Backstay application on boats to 8m (26ft)
- Control line applications on larger yachts
| We recommend using the RF613S shackle to securely attach the block to the existing deck eye on your boat. This helps the block maintain maximum freedom of movement and reduces the risk of wear on the Dyneema loop due to sharp edges on the deck eye, then use the 8072 Rubber Boot to keep the block upright and provide a neat finish. See related items. |
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4.5 ★★★★★
Based on 2007 reviews
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Product Reviews
★★★★★ 3
One of the better food, diet, and health books available, but with significant drawbacks
Format: Kindle
Paul and Shou-Ching Jaminet present the most cogent argument in favor of ancestral-style eating that I have ever read. In fact, I never really understood the logic behind Paleo until I read Perfect Health Diet. I applaud their scientific rigor and willingness to challenge dietary dogma, Paleo or otherwise.
There is no question that removing all grains and legumes from one's diet is incredibly effective for people with autoimmune diseases and some other chronic, intractable health conditions. But when taking the evolutionary perspective on human diets it's also important to recognize that many cultures have thrived on grains and legumes for millennia, and humans have evolved some clever ways to extract nutrients from foods that would otherwise be toxic through the use of prolonged soaking, sprouting, and fermentation, all techniques that are very effective at reducing seed toxicity. I think that properly prepared grains and legumes can be a nutritious part of our diets, at least for those of us who do not suffer from autoimmunity. Stephen Guyenet has written excellent posts on legumes (wholehealthsource.blogspot.com/2013/11/beans-lentils-and-paleo-diet.html) and grains (wholehealthsource.blogspot.com/search/label/lectins).
I also wish that the Jaminets had delved a little bit deeper into the subject of fatty fish from a sustainability standpoint. They recommend that we eat fatty fish, but make no mention of seafood sustainability and the importance of avoiding farmed fish, especially farmed (aka "Atlantic") salmon. Farmed fish are fed soy, corn, and pellets made of smaller fatty fish like anchovies and sardines. Entire small fish fisheries off the coast of Western South America are being destroyed in order to feed our hunger for farmed salmon, while we have plenty of small fatty fish we can eat (but choose not to) here on the west coast of North America (herring, sardines, anchovies, etc.). I bet that the fat profile (3:6 ratio) of farmed salmon is not nearly as good as that of wild salmon and smaller cold water fish.
That said, I highly respect and follow their writing and will continue to look forward to their excellent work.
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Reviewed in the United States on January 28, 2014
★★★★★ 5
Life changing book
Format: Paperback
Amazing life changing book! I’ve grown so much from reading this book than I have in years. It has opened my eyes to learn more about myself and others - that others have recognized that I’ve changed. I hope others discover the same impact as it has on me!
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Reviewed in the United States on April 4, 2026
★★★★★ 5
Self-Care’s Always in Season
Format: Paperback, Format: Paperback
Self Care for Adult Children of EI Parents is a great book to teach the lessons in life you maybe never got the chance to learn. How can you know how to handle or deal with things you were never taught properly or modeled?
This is your start right here! Identify places you need to grow. Self-care comes in several forms and in this book you can explore where you may know you need help or start on page one. Often times caring for others is the way your brain is wired based on experience. Throughout this book you will find tools to get you on track putting yourself care first so you are able to show up for those who deserve if and conserve the energy on those who don’t.
It’s also a great addition to the set by Lindsey Gibson for Emotionally Immature “Parents/People”.
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Reviewed in the United States on January 15, 2026
★★★★★ 5
Life Skills You Were Never Taught
Format: Paperback
I have never felt so seen and heard by Dr. Gibson. This book has truly been life altering for me. The lessons in this book have helped me become a confident leader and a more stable, happy, and kind person. I understand myself so much better than before, and now see how my upbringing has affected me into adulthood.
The valuable lessons in this amazing book are easy to understand and implement in everyday life. Lessons are categorized and laid out in a very easy to read and retain way.
I also have the audiobook and love to follow along and highlight passages. The hearing of the kind words in this book is so healing for me, and I highly recommend it. I feel motivated by this material each time I see it.
Thank you so much, Dr. Gibson, for you dedication to this topic. It has sincerely changed my life for the better.
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Reviewed in the United States on June 30, 2023
★★★★★ 4
Therapist recommended
Format: Paperback
My therapist recommended this book, and I can already see why. It’s incredibly validating and insightful. It really helped me understand so many of my feelings and behaviors in a way I hadn't before. The exercises and practical advice are so helpful and feel very grounded. It's a must-read if you're working through this kind of stuff. I’m so grateful my therapist told me about it.
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Reviewed in the United States on August 28, 2025