Harken 40mm Single Zircon Block

Harken Harken 40mm Single Zircon Block

MPN: 2190

40mm Single Zircon Block

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£67.29
RRP £68.77

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Product Description

The core of the new Zircon blocks are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings apart so they don’t bunch up, touch, and stop each other. The result is a VERY free-running block with less energy lost to friction than in even our current Carbo blocks. Give an unrigged Zircon block a strong spin, and it spins an incredibly long time. Why ceramic bearing balls? Ceramic is a more familiar name for the metallic oxide Zirconia. 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. This becomes evident when you need to ease a sail in very light air. These blocks respond! You feel even the slightest fluctuations in sheet load. When used expertly, that means better sail shape and more speed. For the same bearing sizes, ceramic withstands incredible compression loads, but beyond the limit, they tend to crush not flatten. So, apply them thoughtfully in your rig. We’ll be the first to admit Zircon blocks are not for everyone. They’re more efficient than other Harken small boat blocks, but more expensive too. Here’s how we see it: 1. This is competitive. If we don’t offer this level of performance, someone else might. 2. Sailors know best. If they try one and find value, they will buy more. The opposite is also true. We’re good with that.


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