These are PCD drills for drilling pilot holes in hard brittle materials such as ceramics and quartz glass.
Technical
In response to strong demand for drilling jobs involving wafers and other ceramics, etc., KYOWA has developed this new PCD multi-angle drill series specifically designed for machining hard brittle materials, by leveraging its wealth of know-how on PCD tool machining built up over the years.
Advantages of cBN tools in hardened steel machining
Advantages of PCD tools in aluminum (non-ferrous metal) processing
Example of direct carbide milling with PCD end mill
Example of copper and ceramic machining with PCD spiral flute end mill
Machining of hardened steel with cBN end millEndurance data