The tolerance values for ISO 2768-MK vary depending on the tolerance grade and the nominal dimension. Here are some examples of tolerance values for each grade:
Press fits, slide fits, and bearing journals require tolerances far tighter than the ±0.1 mm to ±0.3 mm provided by the "m" class. These always require explicit limit dimensions or GD&T (Geometric Dimensioning and Tolerancing) callouts. general tolerance iso 2768-mk
Using this standard streamlines the design-to-manufacturing workflow, lowers production costs, and ensures high-quality part interchangeability. 1. Structure of the Designation The tolerance values for ISO 2768-MK vary depending
| Nominal Length Range (mm) | Class f (Fine) | Class m (Medium) | Class c (Coarse) | Class v (Very Coarse) | | :--- | :---: | :---: | :---: | :---: | | | ±0.05 | ±0.10 | ±0.20 | — | | 3 up to 6 | ±0.05 | ±0.10 | ±0.30 | ±0.50 | | 6 up to 30 | ±0.10 | ±0.20 | ±0.50 | ±1.00 | | 30 up to 120 | ±0.15 | ±0.30 | ±0.80 | ±1.50 | | 120 up to 400 | ±0.20 | ±0.50 | ±1.20 | ±2.50 | | 400 up to 1000 | ±0.30 | ±0.80 | ±2.00 | ±4.00 | | 1000 up to 2000 | ±0.50 | ±1.20 | ±3.00 | ±6.00 | | 2000 up to 4000 | — | ±2.00 | ±4.00 | ±8.00 | : For class K, the general tolerance for
Controls the alignment of different cylindrical features.
: For class K, the general tolerance for symmetry is for all nominal lengths up to
To legally enforce these general tolerances, the standard must be specified explicitly inside or near the drawing title block. It should be written exactly as follows: