Immediately after machining parts/elements, CNC precision machining grinders are one of the last manufacturing operations. Abrasive grinders (or wheels) are used in CNC precision machining grinding to provide a precisely flat surface that has a clean end on machined objects. The arrangement involving the two in the same way https://www.sedlacek-t.cz/masturn-820i-4500-vykonny-soustruh-pro-narocne-aplikace/