29MM HARKEN ZIRCON BLOCKS
Zircon blocks are the most efficient small boat blocks Harken has ever made. At the core of Zircon performance are industrial ceramic ball bearings mounted inside caged races. Zircon bearings are more than 700% stronger in compression than stainless bearings of the same size so, they won’t deform if used within the recommended load limits. More importantly, they don’t absorb as much energy before starting to roll resulting in a very responsive, low friction, and free running block.
The newest Zircon offerings are six models with 29 mm sheave diameters. These smaller sizes make Zircon appropriate for control lines where multi-part purchases are required.
Specifications
| Variant | Max Work L (kg) | Break Load (kg) | Weight (g) |
Part no. |
| 29mm Single | 80 kg | 240 kg | 10.5 g | 2185 |
| 29mm Single Becket | 80 kg | 240 kg | 12.6 g | 2186 |
| 29mm Double | 160 kg | 480 kg | 20.4 g | 2187 |
| 29mm Double Becket | 160 kg | 480 kg | 22.5 g | 2188 |
| 29mm Triple | 240 kg | 720 kg | 30.4 g | 2189 |
29mm Zircon sheaves take a maximum line of 6mm
29mm Zircon triple becket block available to purchase via pre order.