Iso 2768 Medium [NEW]
While "medium" is the industry standard, it is not a "one size fits all" solution.
"ISO 2768 medium" refers to a standard tolerance for linear dimensions, which is a part of the ISO 2768 standard. This standard provides general tolerances for linear and angular dimensions, as well as geometric tolerances, for various engineering and manufacturing applications.
A typical drawing block note:
If you'd like to see how these tolerances compare to like "fine" or "coarse," or if you need a downloadable chart for your workshop, let me know!
💰 Specifying "medium" prevents manufacturers from over-processing a part. If a part doesn't need to be accurate to the micron, the medium class allows for faster production and lower scrap rates. iso 2768 medium
If a bearing needs to be pressed into a housing, ISO 2768-m is usually too loose. You would need to specify a tighter, individual tolerance (e.g., H7/g6).
In Part 2, the classes are labeled H, K, and L. Usually, "ISO 2768-m" is paired with "K." If your drawing says , it means: m: Medium tolerances for linear/angular dimensions. While "medium" is the industry standard, it is
Or simply:
If only linear tolerances are required:
Features requiring extreme balance or low friction usually require the "fine" (f) class or custom GD&T.
| Nominal length of shorter side (mm) | Tolerance (± degrees & minutes) | |--------------------------------------|----------------------------------| | up to 10 | ±1° | | >10 to 50 | ±0°30′ | | >50 to 120 | ±0°20′ | | >120 to 400 | ±0°10′ | | >400 | ±0°5′ | A typical drawing block note: If you'd like