Compound Tolerances: Compound tolerance is the final tolerance calculated immediately after adding or subtracting the tolerances of various Proportions which make up an element. CNC machining in the automotive industry is also handy for making 1-off custom parts. The generation of assorted substitute parts is also possible with CNC. https://rafaeliviui.ttblogs.com/12761309/5-essential-elements-for-cnc-precision-lathes-for-industry