Amazon.com: lathe cutting bits
SiAlON Ceramic Inserts. These inserts are made with SiAlON on the cutting edges. SiAlON is a ceramic made from silicon, aluminum, oxygen, and nitrogen that has a balance of wear resistance, chemical resistance, toughness, and heat resistance that makes it good for roughing applications of heat-resistant alloys such as 625 and 718 nickel.
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