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
In the world of engineering and manufacturing, tolerances play a crucial role in ensuring that parts and components fit together seamlessly. One of the most widely used tolerance standards is the ISO 2768-MH tolerance chart, which provides a set of guidelines for determining the acceptable limits of variation in the dimensions of parts and components. In this article, we will delve into the details of the ISO 2768-MH tolerance chart, its significance, and how to use it effectively. iso 2768-mh tolerance chart
ISO 2768 is an international standard for general tolerances for linear and angular dimensions without individual tolerance indications. The stands for medium (tolerance class), and "h" stands for holes (the tolerance class for shafts/holes is not used here; actually, "h" in ISO 2768 refers to the tolerance class for linear dimensions , but common industry shorthand "mh" means: m for linear dimensions (medium), h for geometric tolerances (precision). However, strictly speaking, ISO 2768 consists of two parts: The designation is a combined standard for manufacturing
Angles are treated slightly differently. For Class 'm', the tolerance is expressed in millimeters per millimeter of the shorter side. What "mH" Stands For In the world of
Medium tolerance class for linear and angular dimensions .