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Abrasivejet Orifices: Sapphire - Ruby - Diamond

Why do virtually all abrasivejet manufacturers offer a ruby orifice versus a sapphire? Does ruby hold up better in the harsh environment of abrasivejet cutting?

To say it nicely - you have been misled if you have been told that ruby lasts longer. The unadulterated truth is: sapphire and ruby are the same material. The only difference is the color, and this is achieved by adding trace elements of chromium when growing the crystal. But, you say, you get longer life on the ruby versus the sapphire. How can this be if they are the same?

There are several reasons why some systems inherently provide longer orifice life, but all things being equal, the orifice life may be increased by designing in a more robust edge. This is what manufacturers have been doing for a long time. The net result of beefing up the entrance radius is to preclude catastrophic failure of the jet stream due to a tiny aberration on the radius caused by an impact from the ever-present garnet media. Yes, the ruby is still damaged by these impacts, but each impact is marginalized relative to the coherency of the jet stream. The key drawback of these beefy rubies is that they don't produce the tight coherent jet stream of the typical orifices.

See Diamond Innovation and Performance

Now that you know the truth about sapphires and rubies, it's time to learn why the top producing companies are using nothing but diamonds.

They're not just a girl's best friend anymore; they're yours if you want to leap frog past your competitors.

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