Click to enlargeRonstan Series 30 Block - Single - Loop Top
Manufacturer: RonstanPart #: RF280SKU: 55161
- 660 lb
- Stainless Steel
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Item #: 55161
Category: Blocks
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Description
Series 30 Block - Single - Loop Top Features: Maintenance free Economical Lightweight durable construction Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters etc on larger yachts Materials: UV Stabilized Acetal sheave Grade 316 stainless steel cheeks Specifications: Sheave Ø: 29mm(1-1/8") Max. Rope Ø: 8mm(5/16") M.
W. L.
: 300kg(660lbs) B. L.
: 600kg(1,320lbs) Weight: 20g(0. 7oz)
Specifications
| Brand | Ronstan |
|---|---|
| Part Number | RF280 |
| EverTide SKU | 55161 |
| UPC | 9316800033638 |
| Material | Stainless Steel |
Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.
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Returns & warranty
Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.
Ronstan productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.
Sailing — frequently asked
- How do I size a block for my sailboat?
- Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.
- What is running rigging?
- Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.
- How do I maintain sailboat winches and hardware?
- Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.
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