Antal Aluminium Sheave OPF 140 mm
A genuine Antal replacement sheave for OPF (One-Piece Frame) blocks. The 140 mm aluminium sheave runs on a low-friction composite fibre radial bearing with self-captive Delrin® side balls, delivering smooth rotation under very high loads with no lubrication required. Supplied with a ground stainless-steel hub for precise alignment and long service life, it’s ideal for refreshing OPF blocks or creating custom high-load turning points on cruising and performance yachts.
Why it’s a smart upgrade
- High load, low friction: composite fibre radial bearing plus Delrin® side balls maintain efficiency under heavy sheet/halyard loads.
- Durable and light: hard-anodised aluminium sheave and stainless hub stand up to salt, UV and grit.
- Drop-in fit: built around Antal’s OPF architecture for quick swaps and consistent performance.
Key specifications
- Sheave Ø: 140 mm
- Max rope Ø: 20 mm
- Safe Working Load (SWL): 7,000 kg
- Thickness (T): 25 mm
- Axle/bore Ø (D3): 32 mm
- Hub Ø (D2): 40 mm
- Bearings: Composite fibre (radial) + Delrin® balls (side)
- Sheave material: Aluminium
- Supplied with: Stainless-steel hub
- Weight: ~580 g
Typical applications
- Refurbishing Antal OPF 140 mm single, pad-eye, stand-up and deck-mounted blocks.
- Custom high-load turning points for mainsheets, genoa sheets, cascade tackles and mast-base organisers (within stated SWL).
Fit & compatibility notes
- Confirm your existing block’s sheave Ø (140 mm), axle/bore Ø (32 mm) and thickness (25 mm) before ordering.
- Intended for rope up to 20 mm; for wire, use the corresponding Antal wire-specific sheaves.
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Spécifications
| Width (mm) | 25 |
| Cordage recommandé – Ø Max (mm) | 20 |
| Ø Intérieur (mm) | 32 |
| Matériau | Aluminum |
| Ø réas (mm) | 140 |
| Charge de travail (kg) | 7000 |
| Poids (g) | 580 |
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