Harken Black Magic Air Blocks - 57mm Aluminium Stand-Up Block
Black Magic Air blocks are a top favourite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action. Sideplates and sheaves Hard Lube-anodised for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.
| Part Number | HKN-3227 |
| Sheave Ø (mm) | 57 mm |
| Sheave Ø (in) | 2 1/4 in |
| Length (mm) | 114 mm |
| Length (in) | 4 1/2 in |
| Weight (g) | 200 g |
| Weight (oz) | 7.04 oz |
| Maximum line Ø (mm) | 12 mm |
| Maximum line Ø (in) | 7/16 in |
| Fasteners (mm) | 6 mm |
| Fasteners (in) | 1/4 in |
| Fastener circle (mm) | 37 mm |
| Fastener circle (in) | 1 15/32 in |
| Maximum working load (kg) | 1134 kg |
| Maximum working load (lb) | 2500 lb |
| Breaking load (kg) | 2268 kg |
| Breaking load (lb) | 5000 lb |
| Includes | Padeye |
| A (mm) | 57 mm |
| A (in) | 2 7/32 in |
| B (mm) | 56 mm |
| B (in) | 2 3/16 in |
| C (mm) | 32 mm |
| C (in) | 1 1/4 in |
