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Description
Ronstan Series 55 Rachet Orbit Block, Triple Becket Cleat SwivelProduct Description Ronstan Series 55 Ratchet Orbit Block, Triple underhung becket, adjustable cleat, auto, swivel Features Automatic and manual ratchet in one block Up to 20: 1 holding power Smooth easing of sheets High performance cleating Swivel shackle head for unlimited block rotation Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points Ultra low profile integrated beckets Sheave 2 5 32 in. Max. Rope 3 8
Product Description
Ronstan Series 55 Ratchet Orbit Block, Triple underhung becket, adjustable cleat, auto, swivel
Features
Automatic and manual ratchet in one block
Up to 20:1 holding power
Smooth easing of sheets
High performance cleating
Swivel shackle head for unlimited block rotation
Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points
Ultra low profile integrated beckets
Sheave Ø - 2 5/32 in.
Max. Rope Ø - 3/8 in.
Max. Cable Ø - in
Pin Ø - - in.
M.W.L. - 1650 lb.
B. L. - 3310 lb.
Weight - 13.8 oz.
Product Information
Automatic ratchet block
Now you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong. * Selected Series 55 models.
Awesome ratchet block holding power
Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.
Applications
Mainsheet systems and spinnaker sheets on dinghies, catamarans, sport boats and small keel boats to 9 m (30 ft)
RF55410 when paired with RF56330B and a RF65101 lashed to the becket produces a powerful 8:1 mainsheet system for use on catamarans to 5.5m (18 ft). This can be increased to 9:1 by replacing RF35010 with a RF35202
Halyard, vang and backstay applications on boats a 8m (26 ft)
Control line applications on larger yachts
Materials
sheave: Hard anodised Aluminum
Ball Bearings: high compression strength carbon black Acetal
Frame/Cheeks: Toughened, glass fiber reinforced Nylon
Rope Link: UV stabilized, multi-strand impregnated SK75 Dyneema
Features
Sheave Ø - 2 5/32 in.
Max. Rope Ø - 3/8 in.
Max. Cable Ø - in
Pin Ø - - in.
M.W.L. - 1650 lb.
B. L. - 3310 lb.
Weight - 13.8 oz.
Product Information
Automatic ratchet block
Now you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong. * Selected Series 55 models.
Awesome ratchet block holding power
Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.
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
4.8 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Beautiful
Color: Gold, Size: Small
Arrived carefully packaged and exactly as pictured....its got a little weight to it, but not heavy at all. Great value for the money.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Love her🥹
Love her so much. I just wish I could get her in a much bigger size too. Shipped very quickly and it was well packaged. It’s very lightweight but durable.
Great value for the money. Perfect addition to my bedroom.
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Reviewed in the United States on January 13, 2026
★★★★★ 5
Small but detsil oriented
Color: Laocoon 5.5"
I saw this originally in a render online and fell in love with the fluid motion and emotion within the piece. The tale is tragic, if you want to read it, but this is a beautiful little take on it. Pleased by its size, quality, weight and the detail is impeccable. He chills on my work desk.
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Reviewed in the United States on April 1, 2025
★★★★★ 5
:) cool to paint
Color: David 6", Color: David 6"
I used it to make my best friend a Jojo character for his birthday. It broke a year later but it was pretty cool decor
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Reviewed in the United States on June 7, 2025
★★★★★ 5
Elegant little piece
Color: David 6", Color: David 6"
Simply so perfect. It adds a hint of elegance to any space. I did notice a tiny crack by his ear while taking pictures, still it's barely noticeable. I think it gives it character!
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Reviewed in the United States on October 28, 2024