this post was submitted on 25 Feb 2026
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Tungsten and boron carbide should be much harder than any ceramic, though I have had similar experiences with carbide drill bits. I wonder what exactly "carbide" actually means sometimes.
Most carbide I've run into is usually around 65HRC. The ceramic is have in my lathe right now is 95HRC. Its a significant difference. Its brittle, so it doesn't like interrupted cuts, but it loves heat and speed that would cook carbide in seconds.
65 seems really low to me for something called carbide, but I'll need to do some research into this!