Carbide balls are made by mixing tungsten carbide (WC) and cobalt (Co) as a bonder and then sintering them. They have very high hardness and are used in the fields where wear resistance is required.

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Carbide balls are used for the tips of ballpoint pens. They have higher accuracy (JIS grade 10 or higher) than that of normal ball bearings (JIS grade 20), as well as excellent qualities of corrosion resistance and a wetting property for inks. In order to deal with diverse applications of ballpoint pens and various types of inks, we have developed specific processing techniques for each application.

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