Antal Roller Bearing Sheave OPF 70 mm
A genuine Antal replacement sheave for the OPF (One-Piece Frame) block range. The 70 mm hard-anodised aluminium wheel runs on a high-efficiency roller bearing with self-captive side balls, delivering ultra-low friction under load with minimal maintenance. A ground stainless-steel hub ensures precise alignment and long service life when refreshing well-used OPF blocks.
Why it’s a smart upgrade
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Roller bearing core for excellent efficiency at working loads
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Hard-anodised aluminium sheave with stainless hub for durability
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Direct, drop-in fit for OPF bodies to restore like-new performance
Key specifications
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Sheave Ø: 70 mm
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Max rope Ø: 12 mm
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Safe Working Load (SWL): 1,200 kg
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Thickness (T): 16 mm
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Sheave material: Aluminium
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Bearing type: Roller (+ side balls)
Typical applications
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Refurbishing Antal OPF 70 mm single/double and pad-eye variants
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High-load turning points for mainsheets, genoa sheets and cascade tackles (within stated SWL)
Fit & compatibility notes
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Confirm your block’s sheave Ø (70 mm) and thickness (16 mm) before ordering
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Designed for rope up to 12 mm; not suitable for wire or rod
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