In the world of technical drawing and mechanical engineering, specifying every single dimension with a unique tolerance is impractical, time-consuming, and clutters the blueprint. This is where come into play. Among the most widely recognized standards globally is ISO 2768 , and within that standard, the specific class "mk" represents a critical balance between manufacturing cost and precision.
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
The standard represents the "Medium" standard of modern manufacturing. It balances manufacturing cost with functional reliability. By applying this standard, companies reduce drawing clutter, minimize misinterpretation, and ensure that parts are manufactured to a consistent, acceptable quality level. In the world of technical drawing and mechanical
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. ISO 2768-mK standard is a combined specification used
Straightness limits the variation of a line on a surface, while flatness limits the variation of an entire plane. The tolerance is determined by the length of the longest side or diameter of the surface. Nominal Length Range (mm) Tolerance Class (Medium) over 10 to 30 over 30 to 100 over 100 to 300 over 300 to 1000 over 1000 to 3000 2. Perpendicularity
The standard defines four tolerance grades:
: The choice of tolerance class should always be guided by the functional requirements of the part. In some cases, even medium tolerance classes might be too loose.