Click to enlargeRonstan Series 25 Ball Bearing HHL Lashing Orbit Block™
Manufacturer: RonstanPart #: RF28109HLSKU: 110655
- 13 ft
- Stainless Steel
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Item #: 110655
Category: Blocks
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Description
Series 25 Ball Bearing HHL Lashing Orbit Block™ Single sheave ball bearing high load block with becket hub option and lashing head. The Series 25 Ball Bearing Orbit Blocks™ deliver superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications.
Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan’s renowned high-compression strength acetal bearing system, the Series 25 BB Orbit Blocks are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 metres.
Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability.
The range also includes a High Load (HHL) variant – the RF28109HL – which is equipped with a Grade 2205 stainless steel sheave and bearing race, paired with Grade 304 stainless steel ball bearings. These HHL blocks are purpose-built for high-load applications and are increasingly in demand for modern performance and foiling boats using small-diameter lines to carry significant loads.
Features: 2-stage ball bearing system. Suits up to 8mm (5/16”) lines.
Hollow hub for becket take-off. Lashing blocks suit up to 4mm (5/32”) lashing.
Specifications: Max. Rope diameter (in): 5/16 M.
W. L.
(lb): 880 Sheave diameter (in): 1 B. L.
(lb): 2650 Weight (oz): 1. 2 Applications: Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft).
Control lines. Cascading vangs.
Leech lines & cunninghams. Materials: Frame/cheeks: Toughened, glass fibre reinforced nylon.
HHL Sheave and bearing race: Grade 2205 stainless steel with Grade 304 stainless steel ball bearing
Specifications
| Brand | Ronstan |
|---|---|
| Part Number | RF28109HL |
| EverTide SKU | 110655 |
| UPC | 9316800661930 |
| Material | Stainless Steel |
| Cable Length | 13 ft |
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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