Antal Roller Bearing Sheave OPF 100 mm
A genuine Antal replacement sheave for the OPF (One-Piece Frame) block range. The 100 mm hard-anodised aluminium wheel runs on a high-efficiency roller bearing (with self-captive side balls), delivering ultra-low friction under heavy loads 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 higher 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: 100 mm
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Max rope Ø: 16 mm
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Safe Working Load (SWL): 3,200 kg
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Thickness (T): 21 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 100 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 (100 mm) and thickness (21 mm) before ordering
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Designed for rope up to 16 mm; not suitable for wire or rod
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