What is ISO 2768mK tolerance?
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ISO 2768 is a set of international standards that define linear and angular tolerances to ensure that manufactured parts meet specific size and shape requirements. The ISO 2768 standard consists of different parts like ISO 2768-1, ISO 2768-2, and 
ISO 2768-3, each part is used for different types of tolerances like linear tolerances, angular tolerances, etc.
ISO 2768-MK is part of ISO 2768-1 and specifies the basic rules for linear tolerances. Specifically, ISO 2768-MK defines a set of linear tolerance classes, each corresponding to a different size range. These tolerance levels are identified by letters such as M, N, P, S, U, etc.
ISO 2768-MK specifically defines the following:
1. Allowable linear dimensional deviation: ISO 2768-MK stipulates that the size of a part can exceed the range of its standard size, but it must not exceed specific tolerance limits.
2. Tolerance level: Depending on the size range of the part, different tolerance levels can be selected to determine the appropriate tolerance range.
3. Surface quality: ISO 2768-MK also provides information on the surface quality of parts, including surface roughness requirements.
These tolerances are typically used in general industrial applications where high accuracy is not the most important factor. ISO 2768-MK provides a simple and common approach to guide the manufacture and acceptance of parts to ensure they meet general engineering requirements. But for some specific high-precision applications, tighter tolerance standards may be required. During the design and manufacturing process, it is often necessary to select the appropriate tolerance level for the specific part and application.
