OPF 50 Block – Fiddle

The Antal OPF 50 mm Fiddle Block (Model 00507) is engineered for efficient line handling in high-performance sailing applications. Featuring a single 50 mm composite fibre sheave running on a stainless steel hub, supported by Delrin side bearings, the block delivers ultra-low friction and smooth rope movement without the need for lubrication. The one-piece aluminium frame is CNC-machined, hard black anodised and Teflon-coated for maximum strength, corrosion resistance, and sleek aesthetics.

Designed with simplicity and durability in mind, the block uses no assembly pins or screws—resulting in a compact, lightweight profile that doesn’t compromise on strength or performance. The integrated swivel bail provides secure attachment and optimal alignment, even in dynamic load conditions. At just 120 g, this fiddle block offers a Safe Working Load of 500 kg, making it an excellent choice for both racing and cruising sailors who demand top-tier hardware in a minimal footprint.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 120 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Part Number: 00507 / ANT00507

The Antal OPF 50 mm Fiddle Block is a premium, low-maintenance solution for sailors seeking efficient, durable, and ultra-lightweight deck hardware for demanding line-handling tasks.