The standard provided systematic deviation values (measured in microns,
It is crucial to distinguish from similar standards:
A shaft has a nominal diameter of 25 mm and a tolerance specification of h6 . din 7160 tolerance
It has been replaced by DIN ISO 286-2 . While the older DIN 7160 tables are still frequently found in legacy engineering manuals, modern designs should refer to ISO 286-2 for current shaft tolerance data. Technical Overview
[ T_M = Z - (d_1 + d_2) ]
Many engineers mistakenly apply a general "±0.1 mm" to center distances. This is risky because:
A DIN 7160 tolerance of ±0.1 mm on center distance is equivalent to a Position tolerance of 0.2 mm diameter at maximum material condition (MMC). Technical Overview [ T_M = Z - (d_1
| Tolerance Class | Application | Typical ISO Fit Assumed | | :--- | :--- | :--- | | | Precision bearings, gear shafts, dowel pins | H7/h6 | | Medium (M) | General mechanical assembly, bolted flanges | H7/g6 or H7/h6 | | Coarse (C) | Sheet metal, riveted joints, cast components | H9/d9 or larger |