Iso 2768-mh Tolerance Chart
(Values are in millimeters)
The Ultimate Guide to the ISO 2768-mh Tolerance Chart In precision manufacturing, clear technical drawings prevent costly production errors. The standard simplifies this process by establishing baseline geometric tolerances for parts made by removing material or forming sheet metal. Using this standard eliminates the need to detail tolerances for every single dimension on a blueprint. What is ISO 2768?
If you design a shaft with a length of 50mm and do not write a tolerance, ISO 2768-mh applies. Looking at the chart, 50mm falls into the ">30 up to 120" row. Therefore, the acceptable length is 50mm ±0.3mm (49.7mm to 50.3mm).
This defines the tolerances for geometrical characteristics (flatness, straightness, symmetry). The "h" stands for High (the strictest level for geometry). Part 1: ISO 2768-1 (Linear Dimensions) iso 2768-mh tolerance chart
If you specify , you are asking for Medium linear accuracy but Coarse geometric accuracy.
Also expressed as: Tolerance in mm/m = ±6 mm/m for class m.
The first letter corresponds to and dictates the tolerance class for linear dimensions, external radii, and chamfers. The letter "m" stands for Medium . Other options in this category include (coarse), and (Values are in millimeters) The Ultimate Guide to
Because it pairs medium linear limits with fine geometric rules ("h"), it ensures that components fit together cleanly without excessive warping, twist, or misalignment.
| Nominal Dimension Range (mm) | Permissible Deviation for Class 'm' (mm) | | :--- | :--- | | 0.5 up to 3 | ± 0.1 | | >3 up to 6 | ± 0.1 | | >6 up to 30 | ± 0.2 | | >30 up to 120 | ± 0.3 | | >120 up to 400 | ± 0.5 | | >400 up to 1000 | ± 0.8 | | >1000 up to 2000 | ± 1.2 | | >2000 up to 4000 | ± 2.0 |
Whether your part is being machined in Germany, the US, or China, "ISO 2768-mh" means exactly the same thing. How to Indicate it on Your Drawing What is ISO 2768
Circular run-out includes both radial and axial run-out variations during a full 360-degree rotation. Run-out Tolerance Limit (mm) Why Use the ISO 2768-mh Standard?
These tolerances apply to angular dimensions, usually expressed in degrees and minutes. Length of Shorter Leg (mm) Tolerance (±) 1∘1 raised to the composed with power Over 10 to 50 Over 50 to 120 Over 120 to 400 4. Geometrical Tolerances (ISO 2768-h)
To ensure your design is manufactured perfectly, always use the for your non-critical features, and manually write in specific tolerances for your critical, high-precision mating surfaces.
By incorporating the ISO 2768-mH tolerance chart into your design workflow, you ensure consistent, high-quality production results while providing machinists with clear, unambiguous standards for manufacturing excellence. If you're working on a specific part, could you tell me: What is the ? Is it machined or fabricated ? Share public link
If you want to tailor this data for a specific project, please tell me: