Small Boat Pulleys - Zircon Range - Harken

Small Boat Blocks - Zircon Range - Harken

The Zircon 40mm block is designed to provide exceptional efficiency.

Its ceramic ball bearing sheave ensures low friction and high durability.

The Zircon blocks help sailors immediately adjust the sail profile to the conditions encountered.

They rely on industrial ceramic ball bearings, zirconia, integrated into cage paths.

These cages separate the bearings to prevent them from getting too close, coming into contact, and blocking each other.

Zirconia is over 7 times more resistant to compression than stainless steel bearings and does not absorb as much energy before rotation, which is evident when easing the sail in light winds.

As a result, these blocks are much more responsive than other models on the market: You will feel the slightest fluctuations in load from the sheets.

This results in the most efficient blocks ever made by Harken that will improve the sail profile and increase speed.

The Zircon blocks are available with 40 mm sheaves and offered in single or double versions.

The product in video

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