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    Ronstan

    Ronstan Series 25 Ball Bearing Orbit Block - Lashing [RF28109]

    Ronstan Series 25 Ball Bearing Orbit Block - Lashing [RF28109]

    $16.02
    $18.85 $16.02
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    Product Description

    Series 25 Ball Bearing Orbit Block™ - Lashing

    Single sheave ball bearing block with becket 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.

    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
    • Sheave diameter (in): 1
    • B.L. (lb): 1650
    • Weight (oz): 0.5

    Applications:

    • Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft). 
    • Control lines.
    • Cascading vangs.
    • Leech lines & cunninghams.

    Materials:

    • BB Sheave and balls: High compression strength acetal.
    • Frame/cheeks: Toughened, glass-fiber-reinforced nylon.

    Top Testimonials

    ''Awesome discounts on fishing reels and GPSs. Plus they have next day shipping. The convenience of online shopping is awesome, especially since it's getting harder to get around in store.
    They made sure I got the electronics I needed and all the hardware for the install. They even do repair and installs, so I ended up hiring them for the work I needed done on my Mercury. Awesome experience.''

    JAMES

    "Great experience! I Was looking to purchase a head gaskets for my Johnson 150 hp outboard motor. Mike & Ashley researched parts I needed and come to find out they turned me on to my outboard engine used O-Rings to reassemble my head covers and provided me with parts and torque specs! Thanks! 100% positive feedback and Recommend this Family Business if you need Marine Supplies."

    SCOTT

    Family owned and operated, which is a huge plus for me! I was browsing the website looking at Garmin gps units, their prices are great and competitive! I reached out to them to ask where I might find a hard to find lower unit part I was needing. They had it in stock! If they don’t have something in stock, they will get it asap! 100% recommend and I will buy from them again in the future!

    MATT

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