Improving a lathe spindle head.

[Tonyg]

You will not have a problem with the steel and concrete on the lathe, the thermal coefficients are so close and in the order of 10 to the power of -6/degree C. This combination is used on a lot of the very large CNC machines that I install, build and maintain.
It is the closeness of these Thermal Coefficients that makes it such a good match for reinforced concrete.