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Description
Ronstan RF55101 Series 55 Orbit Single BlockRonstan RF55101 Orbit Block. 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
Ronstan RF55101 Orbit Block. 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 68g
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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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
How the Best Lawyers Think
Format: Paperback
I have only look around in it. When I read it I am sure it will keep my interest.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
Legal
Format: Paperback, Format: Paperback
Understanding the legal system. Insight on how lawyers prepare for their cases. The legal framework for persuading arguments.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 31, 2025
★★★★★ 3
Came damaged
Format: Paperback, Format: Paperback
Im still reading it and its not bad so far but im disappointed that it came in the mail so damaged. The cover is peeling off and its making holding the book hard because i dont want to rip the whole cover off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
★★★★★ 5
A must read for public executives
Format: Paperback
Concise, focused, and full of real-world point and counterpoints, I found this to be more of an essential piece of oratory combat equipment than a book. As a non-lawyer working in public service, this book provides excellent points on interpretation, form versus substance, and the importance of observation and evidence – all skills needed to protect the public interest. As someone who monitors contracts in the public sector, many of my peers could benefit from this book and better design contracts to the advantage of their public entity. Incidentally, I was also involved in a heated discussion about data interpretation the same week I was reading this book, and was able to calmly defend and dominate the discussion until my opponent acquiesced. More important than dominating your opponent is the theme throughout this book that one’s argument must be genuine, and the logic tight. Additionally, as Prof. Trachtman reminds readers that these skills, like a weapon, should only be used for good. A great read!
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Reviewed in the United States on January 13, 2014
★★★★★ 5
What our kids need to hear
Format: Hardcover
This book says exactly what our kids need to hear in these confusing times. There are so many things that our children hear and see these days that it can be overwhelming and confusing. This book and the sweet illustrations make teaching our kids how lucky we are to live in the US so very easy and important. This is something we need to make sure our children appreciate and they will grow up proud to protect our freedoms afforded to us by so many. Love this book!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2022
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