Harken 57 mm Zircon Triple Block
Complete Your Purchase
Harken 57 mm Zircon Triple Block
The Harken 57 mm Zircon Triple Block delivers race-winning performance by allowing trimmers to match sail shapes to changing conditions instantly. The secret lies in industrial ceramic ball bearings mounted inside precision caged races — the cages keep each bearing separated so they cannot bunch together, touch one another, or impede rotation. This innovative bearing system results in the smoothest, most efficient small boat block Harken has ever manufactured.
The 57 mm Zircon Triple Block is built to withstand the demands of competitive sailing, offering a maximum working load of 450 kg (990 lb) and a breaking load of 1350 kg (2970 lb), while tipping the scales at just 128 g (4.52 oz). The compact 79 mm body length makes it easy to integrate into tight deck layouts. The block accepts lines up to 10 mm (3/8 in), making it compatible with a wide range of modern running rigging.
Zircon blocks are available in 40 mm and 57 mm sheave sizes in single and double configurations, with or without beckets, providing flexible rigging options for a variety of small boat systems.
Key Features
- Industrial ceramic ball bearings in caged races for maximum rolling efficiency
- 57 mm sheave diameter accepts lines up to 10 mm (3/8 in)
- Maximum working load: 450 kg (990 lb)
- Breaking load: 1350 kg (2970 lb)
- Lightweight construction: 128 g (4.52 oz)
- Compact length: 79 mm (3 1/8 in)
- Ideal for dinghy, one-design, and small boat applications
- Available in 40 mm and 57 mm sheave sizes, single and double configurations
You May Also Like
