https://www.bjultrasonic.com/shop/ultrasonic-horn/ CNC Ultrasonic milling is a relative new process that allows efficient machining of so-called advanced materials such as hardened steels, carbides, glasses and ceramics. https://www.bjultrasonic.com/ With the aid of an ultrasonic spindle, the vibration of the machine is transferred to a diamond tool. The tool vibrates at a rate of 20,000 times per second,