Harken 57mm High Load Standup Block – Black Magic Air (3227)
Reliable, high-load deck block with stable alignment and smooth performance
The Harken 57mm High Load Standup Block (3227) from the Black Magic® Air series is purpose-built for big boat sail control systems that see constant, high-load activity — including mainsheet leads, halyard deflection, and spinnaker gear. Its standup base keeps the block upright and aligned for consistent, fair line leads across a variety of deck layouts.
Featuring Hard Lube-anodised aluminium sideplates and sheave, the block delivers maximum UV resistance and durability in harsh marine environments. The internal Torlon® roller bearing system, guided by a centre cage, ensures the rollers stay aligned and separate, dramatically reducing friction under load and enabling free-running line movement even during aggressive trimming.
Ideal for deck-mounted applications where controlled articulation and robust load handling are critical, the 3227 is trusted by performance cruisers and offshore racing teams alike.
Specifications
| Length (mm) | 114 |
| Recommended line - Max Ø (mm) | 12 |
| Sheave Ø (mm) | 57 |
| SWL (kg) | 1134 |
| NBL (kg) | 2268 |
| Weight (g) | 200 |
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