Here is the real-world data for ISO 2768-mk. Use this to decide if your design needs tighter tolerances.
120 to 400 mm: ±1.2 mm
ISO 2768-mK standard is a combined specification used in technical drawings to define general tolerances for parts where specific tolerances are not individually noted. It streamlines the design process by providing a baseline for manufacturing accuracy without cluttering drawings with redundant data. Breakdown of the "mK" Designation general tolerance iso 2768-mk
ISO 2768 is an international standard published by the International Organization for Standardization (ISO) that specifies general tolerances for linear and angular dimensions. The standard provides a framework for defining tolerances for parts and components that do not have specific tolerance requirements mentioned elsewhere, such as in the engineering drawings or in other relevant standards. Here is the real-world data for ISO 2768-mk
This part controls the "form" of the part. For example, "K" ensures a surface stays reasonably flat or straight without needing a specific GD&T callout for every face. The General CNC Machining Tolerance: ISO 2768-mk It streamlines the design process by providing a
This class provides permissible deviations based on the nominal size of the dimension. Nominal Length Range (mm) Tolerance (± mm) over 3 to 6 over 6 to 30 over 30 to 120 over 120 to 400 over 400 to 1000 over 1000 to 2000 over 2000 to 4000 ISO 2768-1 Tolerance Chart ISO 2768-2: Geometrical Tolerances (Class K)