Tolerance Chart | Iso 2768-mh

For miniature electronics or micro-machined medical devices, a ±0.1mm tolerance on a 1mm feature represents a massive 10% variance, which is usually unacceptable.

This standard provides a system of general tolerances that simplifies engineering drawings by governing all dimensions that do not have explicitly stated individual tolerances. Among the various classification combinations, is one of the most widely used standards in precision machining, sheet metal fabrication, and general manufacturing. What Does ISO 2768-mh Mean?

The ISO 2768-MH tolerance chart also provides guidelines for geometric tolerances, including:

If you’ve ever looked at a mechanical drawing and seen the note in the title block, you’ve likely wondered: What exactly does this allow? How much deviation is acceptable?

Below is a comprehensive breakdown and the actual charts for the and "h" (high/fine) classes. Understanding the ISO 2768-mh Designation The code is split into two parts: iso 2768-mh tolerance chart

For features smaller than 0.5 mm, tolerances must be indicated directly next to the dimension on the drawing.

General geometrical tolerances specified by ISO 2768-2 for the "H" (fine) class. All values are in mm.

The stands for Medium accuracy. This is the most common standard for general machining. It applies to linear dimensions (lengths, widths, heights) unless a specific tolerance is called out directly on the dimension.

Instead of labeling every single dimension with a tolerance, designers can simply reference "ISO 2768-mh" in the title block . What Does ISO 2768-mh Mean

| Nominal Angle Range | Permitted Deviation (±) | |---------------------|--------------------------| | Shorter leg ≤ 120 mm | ±1° | | Shorter leg >120 mm | ±0.5° per 120 mm (pro-rated) |

Do rely on ISO 2768-mH for:

If a feature is critical for a "press-fit" (like a bearing housing) or requires extreme precision for airtight seals, . In those specific cases, you must manually define a tighter tolerance (e.g., +/- 0.01mm) directly on that dimension.

ISO 2768 is an international standard titled “General tolerances for linear and angular dimensions without individual tolerance indications.” Below is a comprehensive breakdown and the actual

Are you looking to apply these tolerances to a like aluminum or plastic, which might require different considerations? General Tolerance - ISO 2768 1 & 2 - ZEISS Quality Forum

Implementing the ISO 2768-mh standard offers several practical advantages for engineering teams, machine shops, and procurement departments:

Note: This applies to external radii and chamfer heights (not edge radii). Dimension Length (mm) Tolerance m (Medium) (mm) Above 0.5 up to 3 Above 3 up to 6 Above 6 up to 30 Above 30 up to 120 Table C: Angular Dimensions (ISO 2768-1)

Whether you are working in the engineering, manufacturing, or construction industry, the ISO 2768-MH tolerance chart is an essential tool to have in your toolkit. By following the guidelines outlined in this article, you can ensure that your parts and components meet the required tolerances, reducing the risk of defects and improving overall quality.