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Single sheave ball bearing block with becket and lashing head
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
Type of Block: Single
The Series 25 Ball Bearing Orbit Blocks™, delivering 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.
Applications
Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft).
Control lines.
Cascading vangs.
Leech lines & cunninghams.