Specifications for Harken 75mm Black Magic Air Footblock
| Fastener Ø (mm) | 8 FH |
| Length (mm) | 111 |
| Cordage recommandé – Ø Max (mm) | 14 |
| Ø réas (mm) | 75 |
| Hauteur (mm) | 32 |
| Charge de travail (kg) | 2380 |
| Charge de rupture (kg) | 4762 |
| A (mm) | 11.5 |
| B (mm) | 28.5 |
| C (mm) | 70.5 |
| D (mm) | 21 |
| E (mm) | 77 |
| F (mm) | 110 |
| G (mm) | 17 |
| Poids (g) | 277 |
Harken 75mm Black Magic Air Footblock
High-load, low-friction deflection at deck level
The Harken 75mm Black Magic Air Footblock is a premium-grade solution for managing line deflection on deck, offering smooth, efficient routing of loaded sheets, halyards, or control lines. Built for 14mm lines, this footblock is engineered to handle a Safe Working Load (SWL) of 2380kg and a Breaking Load of 4762kg, making it ideal for use on high-performance cruising and racing yachts.
Precision Deflection Where It Matters
Designed to be mounted directly to the deck, this block provides dependable directional changes for high-load lines, such as genoa sheets, mainsheet returns, or mast base halyard leads. Its robust construction and fixed orientation deliver accurate, repeatable line handling under load.
⚠️ Note: As with all footblocks, the actual load experienced will vary significantly depending on the lead angle. Careful consideration of deck layout and load path is essential to ensure safe operation.
Low-Friction Bearing System
The 75mm sheave runs on Torlon® roller bearings, aligned by a centre cage that keeps them parallel and evenly spaced—minimising friction even under full working loads. Delrin® side-load ball bearings provide lateral stability and are fully captive for secure, maintenance-friendly operation.
Hard Lube-Anodised Durability
Both sheaves and side plates are Hard Lube-anodised, delivering maximum UV resistance, corrosion protection, and wear reduction. The durable finish ensures the block remains both functional and aesthetically sharp in the marine environment.
Serviceable Design for Long-Term Use
All Harken Black Magic Air blocks are designed for quick and easy maintenance. Fasteners allow simple disassembly with a hex wrench, and the sealed bearing systems eliminate the risk of losing small parts during cleaning or servicing.
Specifications:
- Sheave Diameter: 75mm
- Maximum Line Diameter: 14mm
- Safe Working Load (SWL): 2380kg
- Breaking Load: 4762kg
- Configuration: Fixed Footblock
For any application where deck-level deflection under load is required, the Harken 75mm Black Magic Air Footblock delivers exceptional strength, smooth operation, and long-term reliability—designed to perform under pressure and built to be maintained with ease.
Spécifications
| Fastener Ø (mm) | 8 FH |
| Length (mm) | 111 |
| Cordage recommandé – Ø Max (mm) | 14 |
| Ø réas (mm) | 75 |
| Hauteur (mm) | 32 |
| Charge de travail (kg) | 2380 |
| Charge de rupture (kg) | 4762 |
| A (mm) | 11.5 |
| B (mm) | 28.5 |
| C (mm) | 70.5 |
| D (mm) | 21 |
| E (mm) | 77 |
| F (mm) | 110 |
| G (mm) | 17 |
| Poids (g) | 277 |
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