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- USA
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Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
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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. |
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
4.8 ★★★★★
Based on 495 reviews
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Product Reviews
★★★★★ 5
Nothing
Color: White Marble 5-tier, Size: 2PCS, Color: White Marble 5-tier, Size: 2PCS
When I was moving they bent easily
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 1
Don’t
Color: White Wood 5-tier, Size: 1PC, Color: White Wood 5-tier, Size: 1PC
It’s huge. Much bigger than expected. Low quality. Unstable.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
10/10
Color: Black Wood 5-tier, Size: 2PCS
Nice quality.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
PERFECT SOLUTION FOR SMALL SPACES.
I recently purchased the Tutotak 6-Tier Book Shelf for my son's room, and I couldn't be happier with it! The 6-tier design is a huge plus. It allows for plenty of storage without taking up too much floor space. The shelves are just the right height for storing books, toys, and decorative items. The vertical design maximizes the use of space, making it ideal for a smaller room like my son's.
Sturdiness:
I was pleasantly surprised by how sturdy this shelf is. Despite its slim profile, it holds up well even with a decent amount of weight on each shelf.
Assembly:
It was easy to assemble, and all the parts were clearly labeled. I was able to set it up within about 30 minutes by myself, and everything lined up perfectly. The instructions were straightforward, so I didn't have to spend much time figuring it out.
Functionality:
Not only is it great for books, but the different levels are also perfect for organizing his toys, art supplies, and even some of his favorite collectibles..
Final Thoughts:
I’m really impressed with this shelf. It’s well-built, space-efficient, and versatile. It has made a huge difference in organizing my son’s room without making it feel cramped. If you have limited space and need something practical but stylish, I highly recommend this bookshelf!
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Reviewed in the United States on September 11, 2025
★★★★★ 5
Super cute
The shelf is cute, and super easy to set-up.
Be careful with the screws, I stripped the magnet screw/hole a little bit. Street that I was a little weary on over-tightening the four corners of each shelf.
Make sure you use the wall straps bc it will be a little wobbly.
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Reviewed in the United States on March 17, 2026
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