At a single end with the bed (nearly always the left, because the operator faces the lathe) is often a headstock. The headstock is made up of large-precision spinning bearings. Rotating throughout the bearings can be a horizontal axle, with an axis parallel for the bed, known as the spindle. https://www.sedlacek-t.cz/nabizime-k-prodeji-cnc-soustruh-tornos-evo-deco-32-10/