Linear tolerances in mm.
Dimensions Normal
 tolerances		 CLASS=standard2Restricted
tolerances
-
5
10
15
20
25
30
40
50
60
70
80
90
110
130

5
10
15
20
25
30
40
50
60
70
80
90
110
130
160
± 0,08
± 0,10
± 0,12
± 0,16
± 0,18
± 0,20
± 0,25
± 0,30
± 0,35
± 0,40
± 0,45
± 0,50
± 0,55
± 0,60
± 0,65
 ± 0,06
± 0,08
± 0,10
± 0,12
± 0,13
± 0,15
± 0,17
± 0,19
± 0,21
± 0,25
± 0,28
± 0,32
± 0,35
± 0,38
± 0,40

Holes in mm.

Ø

Max. depth

De

2 à 4
4 à 6
6 à 8
8 à 10
10 à 12
> 12

Through holes

Blind holes

  1 x Ø
  2 x Ø
  3 x Ø
  4 x Ø
  5 x Ø
>5 x Ø

0,5 x Ø
   1 x Ø
1,5 x Ø
   2 x Ø
   4 x Ø
   5 x Ø

Concentricity
Ø External Ø Internal Excentricity
£15
£25
£40
£50

  5
10
20
25

 0,10
0,20
0,25
0,30
Tolerances on the angles +/- 30'
Internal radii
The largest possible radii should be taken into account to obtain the optimum mechanical characteristics and condition of the components.
Roughness
According to the alloy used and the weight of the item, roughness can vary from : Ra 3,2 à 6,3 µm
Flatness
As a general rule, the tolerance is : 0.07 to 0.10 mm over a linear run of 25 mm.