Ronstan Series 25 Ball Bearing HHL Lashing Orbit Block [RF28109HL]

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 bearings.

Brand: Ronstan Category: Blocks SKU: MM-110655 Options: 1 Availability: Available for sale

Need help confirming whether Blocks is the right fit? Contact Marinautical before ordering if you need help with compatibility, mounting, replacement matching, or marine-use recommendations. Product handle: ronstan-series-25-ball-bearing-hhl-lashing-orbit-block-rf28109hl

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