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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. |
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 ★★★★★
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Product Reviews
★★★★★ 5
Light Sunscreen with a Nice Tropical Scent
Sun protection factor: 30 Sun Protection Factor (SPF), Size: 6 Fl Oz (Pack of 2)
I really like this sunscreen spray for everyday use. It feels lightweight on the skin, sprays on easily, and doesn’t leave a heavy or sticky feeling. The tropical scent smells really nice too. Good option for the beach, pool, or just being outside.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Works and feels Great
Sun protection factor: 70 Sun Protection Factor (SPF), Size: 6 Ounce (Pack of 1)
I just got back from The beautiful island of St Thomas USVI and used this product all throughout my vacation. I’m really picky about sunscreen formula and having dark combination skin, it’s pretty important that I find one I can work with. This was great! It was hydrating but didn’t feel too oily, the smell was subtle and not overwhelming, and I didn’t burn all week especially when I was on a different beach in different areas of the island it worked beautiful for me
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Reviewed in the United States on July 15, 2025
★★★★★ 5
Very good... with a comment.
Size: 3 Fl Oz (Pack of 1)
As a bald dude, I fine the fact that it is matt good. Check it before you leave or, if you use to much, looks like white face upon drydown and in dry areas. I like it. I do. And it protected me from the hot sun of the middle east. No burn.
Just needs a second check after about 10 minutes. But very good at what it does!!!
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Excellent product.
Size: 3 Fl Oz (Pack of 1)
Excellent product. The sun is extremely strong where I live, and I've been using this for several days now; it lasts a very long time on the skin. However, if you have very sensitive skin, I wouldn't recommend using it on your face—in my case, it caused a breakout. But for the neck, body, and arms, it’s excellent. I highly recommend it, and it doesn't leave a bad feel on the skin or an unpleasant smell. If you use it in the water, it is recommended to reapply every hour and 20 minutes, otherwise you might get sunburned.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Daily Staple Sunscreen
Size: 3 Fl Oz (Pack of 1)
I’ve been really impressed with this sunscreen—it’s become a daily staple for my face and hands. The SPF 70 gives great peace of mind, especially with regular sun exposure, and it feels lightweight rather than heavy or greasy.
It absorbs quickly and doesn’t leave that thick white cast, which is a huge plus for everyday wear. On my face, it layers well under makeup without pilling, and on my hands, it doesn’t feel sticky or transfer onto everything I touch.
I also appreciate that it holds up well throughout the day without needing constant reapplication (unless I’m outside a lot). Overall, it’s a reliable, high-protection sunscreen that’s comfortable enough to use every day.
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Reviewed in the United States on April 28, 2026