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Description
Ronstan Orbit Series 55 Fiddle Block w/ Becket & Swivel HeadProduct Description Ronstan Orbit Series 55 Fiddle Block w Becket & Swivel Head Features: Ultra Lightweight Low friction 2 stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating Sheave 2 5 32 + 1 3 8 in. (55 + 35mm) Max. Rope 3 8 in. (10mm) Max. Cable in (mm) Pin in. (mm) M. W. L. 1100 lb. (500 kg.) B. L. 2200 lb. (1000 kg.) Weight 3. 6 oz. (101 g.) Product Information: Lightweight
Product Description
Ronstan Orbit Series 55 Fiddle Block w/ Becket & Swivel Head
Features:
Ultra Lightweight
Low friction 2-stage Orbital ball bearing system
Highest working load in its class
Low profile and compact
High performance cleating
Sheave Ø - 2 5/32 + 1 3/8 in. (55 + 35mm)
Max. Rope Ø - 3/8 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - in. (mm)
M.W.L. - 1100 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 3.6 oz. (101 g.)
Product Information:
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
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
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®
Features:
Sheave Ø - 2 5/32 + 1 3/8 in. (55 + 35mm)
Max. Rope Ø - 3/8 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - in. (mm)
M.W.L. - 1100 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 3.6 oz. (101 g.)
Product Information:
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Applications:
Materials:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Hyper allergic
Scent: Assorted
Hyper allergic! Great bar soap for men.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
★★★★★ 5
Smells amazing
Scent: Assorted
Smells amazing,very happy with this
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
★★★★★ 5
Our very favorite Christmas book
Format: Hardcover
Absolutely beautiful illustrations. A lovely, sweet, well written story that we literally never tire of. I bought this book for my daughter when she was 5 & she is 7 now. We read this book year round - it is so feel good. Edited 1.5 years later - We still love this book. Never a month passes without reading Dasher, rarely a week. My daughter owns nearly 600 books. She read 40 *new* books in August alone, so we do a whole lot of reading in this house. And we still, time and again, come back to Dasher. We love this book so much that I'm back today to order a copy for a friend's granddaughter. While here to place that order I noticed all the negative reviews and felt the need to address them. I am absolutely astonished at how many people can create something to be offended about where there is nothing. Yes, Dasher & her family start the story in a travelling circus. There are zero descriptions of animal cruelty. There is absolutely nothing dark or scary. My daughter has been homeschooled her entire life & is beyond sheltered. She is gifted-intense, which comes with super emotional sensitivity & big, big feelings. Not only does Dasher not frighten or upset her, it is one of my top go-to books to help soothe her when she is upset about something. As for the ending being confusing, that is hog wash. There is nothing choppy or unclear or confusing in the story. Apparently there are more Grinches running amok in the world than I realized!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 2, 2022
★★★★★ 5
The artwork is beautiful
Format: Hardcover
Such a sweet story with beautiful artwork! It is a little on the longer side so may not be good for younger kids with short attention spans
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
★★★★★ 5
Wonderful story
Format: Hardcover
My kids loved this story and the art is beautiful.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
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