Tolerance in CNC machining refers to the allowable variation of a parameter within a specific range. Tolerances specify the allowable range of variation in actual parameter values. In the field of engineering, we can think of tolerances as the control range for errors. Tolerances usually have an upper limit, which is the maximum limit size, and a lower limit, which is the minimum limit size.

In order to reduce part problems caused by tolerances, Xometry has launched the "Mastering Tolerances for Machined Parts" e-book, hoping to help you understand how to determine and define tolerances, and design more accurate parts for your project.