The "m" (medium) class in ISO 2768-1 is commonly used for general machining, allowing for reasonable, cost-effective manufacturing without excessive precision. 1. Linear Dimensions
These apply to most measured lengths, diameters, and depths, including step sizes and distances.
Symmetry tolerances ensure that features sharing a common central plane are properly balanced: Nominal Length Range (mm) Symmetry Tolerance (mm) Run-Out (Circular Run-Out) general tolerance iso 2768-mk
Understanding ISO 2768-mk: The Standard for General Tolerances
This part of the standard applies to dimensions that do not have individual tolerances, including external and internal sizes, step sizes, diameters, radii, distances, chamfer heights, and angular dimensions. It applies to parts produced by metal removal (e.g., CNC milling, turning) or formed from sheet metal. The "m" (medium) class in ISO 2768-1 is
, covering geometrical tolerances like straightness, flatness, and perpendicularity. 1. ISO 2768-1: Linear Dimensions (Class m)
Circular run-out tolerances under Class K are limited to a maximum variation of across the surface, regardless of the part's size. Why Use ISO 2768-mK? Symmetry tolerances ensure that features sharing a common
For these critical features, individual tolerances must always be specified directly on the drawing.
Specifies "Medium" tolerances for linear and angular dimensions (such as lengths, widths, radii, and diameters).