Grey vs Grey Pro detail comparison

I do mechanical engineering stuff but i think I can still weight in : I’ve been toying with intricate small holes (Ø<1mm) and Std Grey is much better at resolving them than Grey Pro is i.e. most of the Grey Pro prints are filled with resin while the holes in the Std Grey prints are clean all the way through.

As for mechanical properties, I haven’t done any formal testing and was pretty skeptical when seeing Grey Pro’s spec sheet as it didn’t seem any different in regard to brittleness. So far I couldn’t afford to do any drop tests but while Grey Pro does seem to be a bit more resistant to impact or compression stresses (I have “dissected” some of these parts to see where the holes were blocked or if they were clean, and it seemed much more difficult to crack open the Grey Pro ones).

Still, even if Grey Pro may be a bit more resistant, it doesn’t seem to resolve as much details and will in any case be far too brittle for “real world” use especially in your scenario. Even Tough can be quite brittle sometimes and Durable is probably not rigid/precise enough for you. Casting is still the way to go IMHO.

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