Stamped steel parts –Part 2: General tolerances, English translation of DIN 6930-2:2011-10 (Dimensions in millimetres)
Here’s a guideline table explaining when to use each table from DIN 6930-2:
| Table No. | Title | When to Use | Application Notes |
|---|---|---|---|
| Table 1 | General tolerances for linear dimensions of flat stampings | Use for flat stampings that are only cut (stamped, punched, or sheared) without any bending or forming. | Applies to linear dimensions such as lengths, widths, and hole diameters in flat parts. |
| Table 2 | General tolerances for radii of curvature of flat stampings | Use for flat stampings with radii, such as round edges or fillets, but without forming operations like bending or deep drawing. | Does not apply to bent parts; only for cut features in flat stampings. |
| Table 3 | General tolerances for angular dimensions of flat stampings | Use for angles in flat stampings where no bending or forming has been applied. | If bending is involved, refer to Table 5 and DIN 6935 instead. |
| Table 4 | General tolerances for linear dimensions of stampings manufactured by forming | Use for formed stampings, including bent or deep-drawn parts. | Covers dimensions affected by forming operations such as bending or deep drawing. |
| Table 5 | General tolerances for radii of curvature of stampings manufactured by forming | Use when bending, deep drawing, or other forming has been applied. | Applies to bending radii, meaning it is critical for determining tolerances in formed parts. |
| Table 6 | Straightness tolerance for strip and sections | Use for strip materials and bent sections to ensure straightness requirements. | Mainly applies to long strips or profiles that may have bending distortions. |
How to Use This Table
- If the part is only cut (stamped, punched, or sheared), use Tables 1, 2, and 3.
- If the part is bent or deep-drawn, use Tables 4, 5, and 6.
- For angular tolerances in bending, refer to DIN 6935 instead of Table 3.
Table 1 — Tolerances for linear dimensions of flat stampings (excluding radii of curvature)
| Nominal size range | Class | Tolerances for thicknesses | ||||
| up to 1 | over 1 up to 3 | over 3 up to 6 | over 6 up to 10 | over 10 | ||
| Up to 6 | f | ± 0.05 | ± 0.08 | ± 0.1 | ± 0.2 | ± 0.4 |
| m | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.3 | ± 0.4 | |
| g | ± 0.2 | ± 0.3 | ± 0.4 | ± 0.6 | ± 0.8 | |
| sg | ± 0.5 | ± 0.5 | ± 0.8 | ± 1.2 | ± 1.5 | |
| Over 6 up to 10 | f | ± 0.08 | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.4 |
| m | ± 0.15 | ± 0.2 | ± 0.25 | ± 0.4 | ± 0.4 | |
| g | ± 0.3 | ± 0.4 | ± 0.5 | ± 0.8 | ± 0.8 | |
| sg | ± 0.8 | ± 1 | ± 1 | ± 1.5 | ± 1.5 | |
| Over 10 up to 25 | f | ± 0.1 | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.4 |
| m | ± 0.2 | ± 0.25 | ± 0.3 | ± 0.4 | ± 0.6 | |
| g | ± 0.4 | ± 0.5 | ± 0.6 | ± 0.8 | ± 1 | |
| sg | ± 1 | ± 1 | ± 1.5 | ± 1.5 | ± 2 | |
| Over 25 up to 63 | f | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.3 | ± 0.4 |
| m | ± 0.25 | ± 0.3 | ± 0.4 | ± 0.5 | ± 0.6 | |
| g | ± 0.5 | ± 0.6 | ± 0.8 | ± 1 | ± 1.2 | |
| sg | ± 1 | ± 1 | ± 1.5 | ± 2 | ± 3 | |
| Over 63 up to 160 | f | ± 0.15 | ± 0.15 | ± 0.2 | ± 0.3 | ± 0.4 |
| m | ± 0.3 | ± 0.4 | ± 0.5 | ± 0.6 | ± 0.8 | |
| g | ± 0.6 | ± 0.8 | ± 1 | ± 1.2 | ± 1.6 | |
| sg | ± 1.5 | ± 1.5 | ± 2 | ± 3 | ± 3 | |
| Over 160 up to 400 | f | ± 0.2 | ± 0.3 | ± 0.3 | ± 0.4 | ± 0.5 |
| m | ± 0.5 | ± 0.6 | ± 0.6 | ± 0.8 | ± 1.0 | |
| g | ± 1 | ± 1.2 | ± 1.2 | ± 1.6 | ± 2 | |
| sg | ± 1.5 | ± 2 | ± 2.5 | ± 3 | ± 3 | |
| Over 400 up to 1000 | f | ± 0.4 | ± 0.4 | ± 0.5 | ± 0.5 | ± 0.8 |
| m | ± 0.8 | ± 0.8 | ± 1 | ± 1 | ± 1.5 | |
| g | ± 1.6 | ± 1.6 | ± 2 | ± 2 | ± 3 | |
| sg | ± 2.5 | ± 2.5 | ± 3 | ± 4 | ± 4 | |
| Over 1000 up to 6300 | f | ± 0.8 | ± 0.8 | ± 0.8 | ± 1 | ± 1 |
| m | ± 1.2 | ± 1.5 | ± 1.5 | ± 2 | ± 2 | |
| g | ± 2.5 | ± 2.5 | ± 3 | ± 4 | ± 4 | |
| sg | ± 4 | ± 4 | ± 4 | ± 4 | ± 4 | |
Table 2 — General tolerances for radii of curvature
| Nominal size range | CLASS | Tolerances for thicknesses | ||||
| up to 1 | over 1 up to 3 | over 3 up to 6 | over 6 up to 10 | over 10 | ||
| Up to 6 | f, m, | ± 0.2 | ± 0.3 | ± 0.5 | – | – |
| g, sg | ± 0.4 | ± 0.6 | ± 1.0 | – | – | |
| Over 6 up to 10 | f, m, | ± 0.3 | ± 0.4 | ± 0.5 | ± 0.6 | – |
| g, sg | ± 0.6 | ± 0.8 | ± 1.0 | ± 1.2 | – | |
| Over 10 up to 25 | f, m, | ± 0.4 | ± 0.5 | ± 0.6 | ± 0.8 | ± 1.0 |
| g, sg | ± 0.8 | ± 1.0 | ± 1.2 | ± 1.6 | ± 2.0 | |
| Over 25 up to 63 | f, m, | ± 0.5 | ± 0.6 | ± 0.8 | ± 1.0 | ± 1.2 |
| g, sg | ± 1.0 | ± 1.2 | ± 1.6 | ± 2.0 | ± 2.4 | |
| Over 63 up to 160 | f, m, | ± 0.8 | ± 1.0 | ± 1.2 | ± 1.4 | ± 1.6 |
| g, sg | ± 1.6 | ± 2.0 | ± 2.4 | ± 2.8 | ± 3.2 | |
| Over 160 up to 400 | f, m, | ± 1.0 | ± 1.2 | ± 1.5 | ± 1.8 | ± 2.0 |
| g, sg | ± 2.0 | ± 2.4 | ± 3.0 | ± 3.6 | ± 4.0 | |
| Over 400 | f, m, | ± 1.6 | ± 2.0 | ± 2.2 | ± 2.5 | ± 3.0 |
| g, sg | ± 3.2 | ± 4.0 | ± 4.4 | ± 5.0 | ± 6.0 | |
Table 3 — General tolerances for angular dimensions of flat stampings
| Class | General tolerances for a nominal size of the shorter leg, in angular units | |||||||
| up to 6 | over 6 up to 10 | over 10 up to 25 | over 25 up to 63 | over 63 up to 160 | over 160 up to 400 | over 400 up to 1000 | over 1000 up to 2500 | |
| f | ± 1° | ± 1° | ± 30′ | ± 30′ | ± 20′ | ± 10′ | ± 5′ | ± 5′ |
| m | ± 1°30′ | ± 1°30′ | ± 50′ | ± 50′ | ± 25′ | ± 15′ | ± 10′ | ± 10′ |
| g, sg | ± 3° | ± 3° | ± 2° | ± 2° | ± 1° | ± 30′ | ± 20′ | ± 20′ |
Table 4 — General tolerances for linear dimensions of stampings manufactured by forming (excluding radii of curvature)
| Nominal size range | CLASS | General tolerances for thicknesses | ||||
| up to 1 | over 1 up to 3 | over 3 up to 6 | over 6 up to 10 | over 10 | ||
| Up to 6 | f | ± 0.1 | ± 0.16 | ± 0.2 | ± 0.4 | ± 0.8 |
| m | ± 0.2 | ± 0.3 | ± 0.4 | ± 0.6 | ± 0.8 | |
| g | ± 0.4 | ± 0.6 | ± 0.8 | ± 1.2 | ± 1.6 | |
| sg | ± 1.0 | ± 1.0 | ± 1.6 | ± 2.0 | ± 3.0 | |
| Over 6 up to 10 | f | ± 0.16 | ± 0.2 | ± 0.3 | ± 0.4 | ± 0.8 |
| m | ± 0.3 | ± 0.4 | ± 0.5 | ± 0.8 | ± 0.8 | |
| g | ± 0.6 | ± 0.8 | ± 1.2 | ± 1.6 | ± 1.6 | |
| sg | ± 1.6 | ± 2.0 | ± 2 | ± 3 | ± 3 | |
| Over 10 up to 25 | f | ± 0.2 | ± 0.2 | ± 0.3 | ± 0.4 | ± 0.8 |
| m | ± 0.4 | ± 0.5 | ± 0.6 | ± 0.8 | ± 1.2 | |
| g | ± 0.8 | ± 1.0 | ± 1.2 | ± 1.6 | ± 1.8 | |
| sg | ± 2.0 | ± 2.0 | ± 3 | ± 3 | ± 4 | |
| Over 25 up to 63 | f | ± 0.2 | ± 0.3 | ± 0.4 | ± 0.6 | ± 0.8 |
| m | ± 0.5 | ± 0.6 | ± 0.8 | ± 1.0 | ± 1.2 | |
| g | ± 1.0 | ± 1.2 | ± 1.6 | ± 2 | ± 2.4 | |
| sg | ± 2.0 | ± 2.0 | ± 3 | ± 4 | ± 6 | |
| Over 63 up to 160 | f | ± 0.3 | ± 0.3 | ± 0.4 | ± 0.6 | ± 0.8 |
| m | ± 0.6 | ± 0.8 | ± 1.0 | ± 1.2 | ± 1.6 | |
| g | ± 1.2 | ± 1.6 | ± 2 | ± 2.4 | ± 3.2 | |
| sg | ± 3.0 | ± 3.0 | ± 4 | ± 6 | ± 6 | |
| Over 160 up to 400 | f | ± 0.4 | ± 0.6 | ± 0.6 | ± 0.8 | ± 1.0 |
| m | ± 1.0 | ± 1.2 | ± 1.2 | ± 1.6 | ± 2 | |
| g | ± 2 | ± 2.4 | ± 2.4 | ± 3.2 | ± 4 | |
| sg | ± 3 | ± 4 | ± 5 | ± 6 | ± 6 | |
| Over 400 up to 1000 | f | ± 0.8 | ± 0.8 | ± 1 | ± 1 | ± 1.6 |
| m | ± 1.6 | ± 1.6 | ± 2 | ± 2 | ± 3 | |
| g | ± 3.2 | ± 3.2 | ± 4 | ± 4 | ± 6 | |
| sg | ± 5 | ± 5 | ± 6 | ± 8 | ± 8 | |
| Over 1000 up to 2500 | f | ± 1.6 | ± 1.6 | ± 1.6 | ± 2 | ± 2 |
| m | ± 2.4 | ± 3 | ± 3.0 | ± 4 | ± 4 | |
| g | ± 5 | ± 5 | ± 6 | ± 8 | ± 8 | |
| sg | ± 8 | ± 8 | ± 8 | ± 8 | ± 8 | |
Table 5 — General tolerances for radii of curvature (produced by cutting, bending or deep drawing) of stampings manufactured by forming
| Nominal size range | Class | General tolerances for thicknesses | ||||
| up to 1 | over 1 up to 3 | over 3 up to 6 | over 6 up to 10 | over 10 | ||
| Up to 6 | f | ± 0.2 | ± 0.3 | ± 0.6 | – | – |
| m | ± 0.4 | ± 0.6 | – | – | – | |
| g | ± 0.6 | – | – | – | – | |
| sg | – | – | – | – | – | |
| Over 6 up to 10 | f | ± 0.4 | ± 0.6 | ± 0.8 | ± 1 | – |
| m | ± 0.6 | ± 1 | ± 1.2 | ± 1.5 | – | |
| g | ± 1.2 | ± 2 | ± 2.5 | – | – | |
| sg | ± 1.6 | ± 2 | ± 2.5 | – | – | |
| Over 10 up to 25 | f | ± 0.6 | ± 0.8 | ± 1 | ± 1.2 | ± 1.5 |
| m | ± 1 | ± 1.2 | ± 1.5 | ± 2 | ± 2.5 | |
| g | ± 2 | ± 2.5 | ± 4 | – | – | |
| sg | ± 2.5 | ± 4 | ± 4 | – | – | |
| Over 25 up to 63 | f | ± 0.8 | ± 1 | ± 1.2 | ± 1.5 | ± 2 |
| m | ± 1.2 | ± 1.5 | ± 2 | ± 2.5 | ± 4 | |
| g | ± 2.5 | ± 4 | ± 6 | – | – | |
| sg | ± 4 | ± 6 | ± 6 | – | – | |
| Over 63 up to 160 | f | ± 1 | ± 1.2 | ± 1.5 | ± 2 | ± 2.5 |
| m | ± 1.5 | ± 2 | ± 2.5 | ± 4 | ± 6 | |
| g | ± 4 | ± 6 | ± 10 | ± 15 | ± 25 | |
| sg | ± 6 | ± 10 | ± 10 | ± 15 | ± 25 | |
| Over 160 up to 400 | f | ± 1.2 | ± 1.5 | ± 2 | ± 2.5 | ± 3 |
| m | ± 2 | ± 2.5 | ± 4 | ± 6 | ± 10 | |
| g | ± 6 | ± 10 | ± 15 | ± 25 | ± 40 | |
| sg | ± 10 | ± 15 | ± 15 | ± 25 | ± 40 | |
| Over 400 up to 1000 | f | ± 1.6 | ± 2 | ± 2.5 | ± 3 | ± 4 |
| m | ± 2.5 | ± 4 | ± 6 | ± 10 | ± 15 | |
| g | ± 10 | ± 15 | ± 25 | ± 40 | ± 60 | |
| sg | ± 15 | ± 25 | ± 25 | ± 40 | ± 60 | |
Table 6 — Straightness tolerance n for strip cut by shears and sections bent from strip (notation)
| Strip or section length | Straightness tolerances |
| l | n |
| up to 2 000 | 1 |
| over 2 000 up to 3 000 | 2.25 |
| over 3 000 up to 4 000 | 4 |
| over 4000 up to 5000 | 6.25 |
| over 5000 up to 6000 | 9 |
The straightness tolerances are based on a minimum ratio of strip width b to product thickness s of b: s = 25: 1 (see also Figure above). For sections bent from strip, the tolerance n given in Table 6 applies for each longitudinal axis of the section.
Explanatory Notes:
To convert the angular dimensions specified in Table 3 into linear dimensions for measurement purposes, use the tangent values given in Table A.1
| Table A.1 | |
|---|---|
| Angle | Tangent |
| 5′ | 0,001 5 |
| 10′ | 0,002 9 |
| 15′ | 0,004 4 |
| 20′ | 0,005 8 |
| 25′ | 0,007 3 |
| 30′ | 0,008 7 |
| 50′ | 0,014 5 |
| 1° | 0,017 5 |
| 1° 30′ | 0,026 2 |
| 2° | 0,034 9 |
| 3° | 0,052 4 |
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