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DIN 7168 - General dimension tolerances

DIN 7168 is a general tolerance standard for linear and angular dimensions, which could be widely used for inspection to cast iron and cast steel castings. It is a very useful standard for buyers and suppliers. 

Table 1. Permissible deviations for linear dimensions except for external radii and chamfer heights

Tolerance
class

Permissible deviations, in mm, for nominal sizes, in mm,

from
0.5
to
3

over
3
up to
6

over
6
up to
30

over
30
up to
120

over
120
up to
400

over
400
up to
1000

over
1000
up to
2000

over
2000
up to
4000

over
4000
up to
8000

over
8000
up to
12000

over
12000
up to
16000

over
16000
up to
20000

f
(fine)

±0.05

±0.05

±0.1

±0.15

±0.2

±0.3

±0.5

±0.8

 

m
(medium)

±0.1

±0.1

±0.2

±0.3

±0.5

±0.8

±1.2

±2

±3

±4

±5

±6

g
(coarse)

±0.15

±0.2

±0.5

±0.8

±1.2

±2

±3

±4

±5

±6

±7

±8

sg
(very coarse)

±0.5

±1

±1.5

±2

±3

±4

±6

±8

±10

±12

±12

For nominal sizes below 0.5 mm, the deviations shall be indicated adjacent to the relevant nominal size.

Table 2. Permissible deviations for external radii and chamfer heights

Tolerance
class

Permissible deviations, in mm,
for nominal sizes, in mm,

from
0.5
to
3

over
3
up to
6

over
6
up to
30

over
30
up to
120

over
120
up to
400

F (fine)

±0.2

±0.5

±1

±2

±4

M (medium)

G (coarse)

±0.2

±1

±2

±4

±8

Sg (very coarse)

Table 3. Permissible deviations for angular dimensions 

Tolerance
class

Permissible deviations, in units of angle, for nominal sizes of the shorter leg, in mm.

over
10

over
10
up to
50

over
50
up to
120

over
120
up to
400

over
400

F (fine)

±1°

±30′

±20′

±10′

±5′

M (medium)

G (coarse)

±1°30′

±50′

±25′

±15′

±10′

Sg (very coarse)

±3°

±2°

±1°

±30′

±20′

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