Harken Zircon 57 mm Double Block – High-Performance Ceramic Balls

Description

Harken Zircon 57 mm Double Block – High-Performance Ceramic Balls

Specifications
Diameter of the sheave (mm) 57 mm
Diameter of the sheave (in) 2 1/4 in
Length (mm) 95 mm
Length (in) 3 3/4 in
Weight (g) 51.4 g
Weight (oz) 1.81 oz
Max line diameter (mm) 10 mm
Max line diameter (in) 3/8 in
Maximum working load (kg) 150 kg
Maximum working load (lb) 330 lb
Breaking load (kg) 450 kg
Breaking load (lb) 990 lb

The strength of the Zircon blocks lies in their ceramic ball bearings, housed within a cage.
The balls rotate freely without touching each other, minimizing friction.
The result is a high-efficiency block. The term ceramic refers to the metallic element zirconium. Zircon bearings are approximately 7.5 times more resistant to compression than stainless steel. They do not absorb energy before they begin to roll.
You feel the difference when you need to ease a sail in light winds: the blocks respond immediately! You can feel the slightest pressure on the line.
When used properly, they allow for optimal adjustment of sail shape and make the boat faster.

Diameter of sheave: 57 mm (2 1/4 in)

Length: 95 mm (3 3/4 in)

Weight: 51.4 g (1.81 oz)

Max line diameter: 10 mm (3/8 in)

Maximum working load: 150 kg (330 lb)

Breaking load: 450 kg (990 lb)