Tolerance grades range from 'A' to 'ZC' for holes, and 'a' to 'zc' for shafts. Additional functionality of ISO 2768 tolerances. Users can now find tolerances for Linear dimensions, Chamfers and Radii, Angles, Straightness, Flatness, Perpendicularity, Symmetry, and run out as defined in ISO 2768 table 1 and table 2. Iso 2768-mh Tolerance Chart IS0 2768-2 2768”; b) the tolerance class Related searches for iso hole tolerances 2768 mk din iso 2768 mk tolerances - practical machinist m. Follow: General tolerances according to DIN ISO 2768-mk 1) Without general tolerances DIN ISO 2768-mK DIN EN ISO 13920-BF NN 14 T. Se Table 1 - Permissible deviations for. General Tolerances to DIN ISO 2768 T1 and T2. The latest DIN standard sheet version applies to all parts made to DIN standards. Variations on dimensions without tolerance values are according to 'DIN ISO 2768-mk'. GENERAL TOLERANCES FOR LINEAR AND ANGULAR DIMENSIONS (DIN ISO 2768 T1). General tolerance ISO 2768 does not specify where to use these tolerances. As per design requirements and manufacturing capability tolerance class is defined. For example: For sheet metal parts ISO 2768–mk is used. And for machined components ISO 2768–fh can be used.
Iso 2768-mh Tolerance Chart
Table 1 – Allowable deviations for linear dimensions (excluding damaged edges) | |||||||||
Value is expressed in mm | |||||||||
Tolerance level | Allowable deviation of nominal size | ||||||||
name | description | 0.51) ~ 3 | >3 ~ 6 | >6 ~ 30 | >30 ~ 120 | >120 ~ 400 | >400 ~ 1000 | >1000 ~ 2000 | >2000 ~ 4000 |
f | Precision level | ±0.05 | ±0.05 | ±0.1 | ±0.15 | ±0.2 | ±0.3 | ±0.5 | - |
m | Medium level | ±0.1 | ±0.1 | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 |
c | Rough grade | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 | ±3 | ±4 |
v | The coarsest level | - | ±0.5 | ±1 | ±1.5 | ±2.5 | ±4 | ±6 | ±8 |
1) For nominal dimensions below 0.5mm, the deviation shall be marked after the nominal size. | |||||||||
Table 2 – Permissible deviations from the linear dimensions of the damaged edge (rounding radius and chamfer height) | |||||||||
Value is expressed in mm | |||||||||
Tolerance level | Allowable deviation of nominal size | ||||||||
name | description | 0.5 1) ~ 3 | > 3 ~ 6 | > 6 | |||||
f | Precision level | ±0.2 | ±0.5 | ±1 | |||||
m | Medium level | ||||||||
c | Rough grade | ±0.4 | ±1 | ±2 | |||||
v | The coarsest level | ||||||||
1) For nominal dimensions below 0.5mm, the deviation shall be marked after the nominal size. | |||||||||
Table 3 - Allowable deviations for angular dimensions | |||||||||
Value is expressed in mm | |||||||||
Tolerance level | Angle deviation of the short side of the allowed angle according to the length (mm) | ||||||||
name | description | ≤10 | >10 ~ 50 | > 50 ~ 120 | >120 ~ 400 | > 400 | |||
f | Precision level | ±1 ̊ | ±0 ̊30 ́ | ±0 ̊20 ́ | ±0 ̊10 ́ | ±0 ̊5 ́ | |||
m | Medium level | ||||||||
c | Rough grade | ±1 ̊30 ́ | ±1 ̊ | ±0 ̊30 ́ | ±0 ̊15 ́ | ±0 ̊10 ́ | |||
v | The coarsest level | ±3 ̊ | ±2 ̊ | ±1 ̊ | ±0 ̊30 ́ | ±0 ̊20 ́ | |||
Table 1 – General tolerances for flatness and flatness | Table 4 – General tolerances for circumferential runout | ||||||||
Value is expressed in mm | Value is expressed in mm | ||||||||
Tolerance level | Flat tolerances for flatness and flatness of the nominal length range | Tolerance level | Circumferential runout tolerance | ||||||
≤10 | >10-30 | >30-100 | >100-300 | >300-1000 | >1000-3000 | H | 0.1 | ||
H | 0.02 | 0.06 | 0.1 | 0.2 | 0.3 | 0.4 | K | 0.2 | |
K | 0.05 | 0.1 | 0.2 | 0.4 | 0.6 | 0.8 | L | 0.5 | |
L | 0.1 | 0.2 | 0.4 | 0.8 | 1.2 | 1.6 | |||
Table 2 – General tolerances for straightness | Table 3 – Symmetry General Tolerance | ||||||||
Value is expressed in mm | Value is expressed in mm | ||||||||
Tolerance level | Straightness tolerance of the short length of the nominal length | Tolerance level | Straightness tolerance of the short length of the nominal length | ||||||
≤100 | >100-300 | >300-1000 | >1000-3000 | ≤100 | >100-300 | >300-1000 | >1000-3000 | ||
H | 0.2 | 0.3 | 0.4 | 0.5 | H | 0.5 | |||
K | 0.4 | 0.6 | 0.8 | 1 | K | 0.6 | 0.8 | 1 | |
L | 0.6 |