... , table , column , beam , XZ slide , Z slide are all cast iron structure , and were confirmed by high-temperature ... and torsional rigidity. *Z slide and the spidle seat are made in one body , and is accurately machined, so ... rigidty and precision. And the Z guide way are mounted on the Y-Z slide, so that ... warranty spindle . cnc metal handle machine MGV4030GP are made of cast iron (general precision)