While powerful, the ISO 2768-mh chart is not a universal panacea. Engineers must apply it with intelligence.
ISO 2768 is divided into two primary parts that together form the basis of the "mH" designation: ISO 2768-1 (Part 1): iso 2768-mh tolerance chart
The designation is a combined standard for manufacturing parts without specific individual tolerances. It pairs medium (m) dimensional precision for lengths and angles with high (H) geometric accuracy for shapes. Using this standard simplifies technical drawings and ensures a baseline level of "good workmanship" across international supply chains. What "mH" Stands For While powerful, the ISO 2768-mh chart is not
ISO 2768 is an international standard that defines general tolerances for linear and angular dimensions. The standard provides a set of tolerances that can be applied to various features, such as lengths, widths, heights, and angles. The goal of ISO 2768 is to ensure that parts and components can be manufactured and assembled with a reasonable degree of accuracy, while also allowing for some degree of variation. It pairs medium (m) dimensional precision for lengths
Tolerance (grade m) for length L (mm):
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