In many automotive molding applications it may be beneficial to use steel given its heat resistance and hardness. The Nanoform X with son-x ultrasonic tool post is capable of directly machining steel molds with a surface finish of less than 2 nm Ra and a form accuracy of less than 200 nm PV. Typically the extraordinary diamond tool wear experienced while cutting steel has made it difficult to use as a mold material. With the ultrasonic tool post tool wear is comparable to other non-ferrous metals.
The dove-tail slide design of the Nanoform X results in superior dynamic stiffness. This enables better surface finish with the son-x device compared to what is achievable on other diamond turning machines.