Compound Tolerances: Compound tolerance is the ultimate tolerance calculated following incorporating or subtracting the tolerances of different Proportions which make up a part. The holes might be for parts assembly or aesthetic functions. CNC drill presses can build distinct-sized holes by different the scale of the drill little bit. https://www.sedlacek-t.cz/masturn-550i-vykonny-soustruh-s-presnosti-a-flexibilitou/