SJX Watches
In-Depth: Orient Star’s Smart Silicon Escape Wheel
While silicon mechanical movement components have swept across Switzerland, adoption has been slow within the Japanese watch industry, stymied by Swiss patents and professed concerns over the material’s durability. To this day, it remains the unlikely domain of Orient Star, a small brand with priority access to Seiko Epson’s massive industrial base. This positions Orient Star to capitalise on consumer demand for increasingly long power reserves, without sacrificing performance. Thanks to an ultralight and geometrically efficient escape wheel with a patented design, Orient Star is able to deliver a 70-hour power reserve without resorting the same counter-productive trade-offs to balance energy made by some Swiss peers – here’s how it was done. A silicon wafer of escape wheels. Image – Seiko Epson The quest for longer power reserves Recent consumer demand for longer power reserves has sent the industry’s engineers scrambling for ways to increase the autonomy of existing movement platforms. A movement’s power reserve is dictated by the length of the mainspring, which unwinds at a constant rate. That is why using a chronograph doesn’t cause a watch to run down faster – usually. Of course, you need to find somewhere to fit that extra length of mainspring while maintaining the movement’s dimensions, such as by thinning out the barrel walls, narrowing the inner barrel arbour radius, or, reducing the thickness of the mainspring. However, while decreasing the ma...
