Mechanical seal material issues
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In the mechanical seal materials, the term “carbon black” is used; it’s not clear whether it refers to silicon carbide, graphite, or some other material
It should be tungsten carbide; the phone number is the profile picture
Tungsten carbide is probably cemented carbide, right? Bro, I’m from a manufacturer too
Southerners like to call graphite \"carbon paste\"; you needn’t worry at all – in the Dongguan area, people refer to the 59U moving coils of John Kran as carbon paste as well
···I’ve really never encountered that; usually, once you get the shape, you just use a file to shape it