View single post by Hammerfjord
 Posted: Thu Sep 27th, 2012 05:12 pm
PM Quote Reply Full Topic
Hammerfjord



Joined: Thu Apr 16th, 2009
Location: Arctic, Norway
Posts: 5821
Status: 
Offline
There's an important relation between the crystal's thickness and the bezel's top: Over, under or right on the crystal's edge.
Why? Well, until I experienced it: I never asked me the question in fact.
Been constantly seeing crystal edges popping out of bezels and never thought out of the box as : Is it a handicap?
Yes it is...
There's no mystery in: Sharp edges are prone to easy shattering under stress.
So, let's get down to the business: I built an homage for working when I'm on oil/gas rigs.
I used it for weeks without any trouble but on one trip, I managed to damage the crystal twice.
How? Just by leaning on a valve-wheel at first and after just by hitting slowly a flange...Bad luck, the leather glove and my working coverall wasn't in between.
It's an Asian case with sapphire crystal: I ordered a sapphire and I know the difference between a sapphire and a mineral, even how to test the difference...
Sapphire is sapphire, or 9 on Mohs hardness scale even when it's thermal grown(man made).
If you want harder: Get a diamond who's 10 on Mohs...
So you get my point: Your Rolex crystal isn't harder than that.
Point is: When your crystal have to be this thick to handle some hundreds meter pressure under water and you bezel is this thin because you watch is designed to be slim: You crystal's edge is exposed.
Pictures there...


It's not easy to capture it with the light effects but you can see the cracks.
Of course we don't talk about big shattering but remember that I wasn't smashing hard on it.
I wait for your meanings and inputs
crusty.gif