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Kvalitetsstyringssystem og
Certifikater:
- Kvalitetssikring: ISO 9001-2:2000
- Miljø: ISO 14001
Kvalitetsstandard:
Kvalitets Norm: ISO 2768:
According to DIN ISO 2768-1
General
tolerances for linear measures and level squares with
four tolerance classes are useful for simplifying drawings.
By choosing the tolerance class precision levels common in
workshops should be taken into account.
If
smaller tolerances are needed or bigger ones are more
economical,
then these tolerances are indicated next to the nominal size.
Tabular 1 Limits for linear measures
Tolerance-
class
|
Limits in mm for
nominal sizes in mm
|
0,5
to 3
|
above
3 to 6
|
above 6 to 30
|
above 30 to 120
|
above 120 to 400
|
above 400
to 1000
|
above 1000
to 2000
|
above 2000
to 4000
|
f
(fine) |
±
0,05
|
±
0,05
|
±
0,1
|
±
0,15
|
±
0,2
|
±
0,3
|
±
0,5
|
-
|
m
(medium) |
±
0,1
|
±
0,1
|
±
0,2
|
±
0,3
|
±
0,5
|
±
0,8
|
±
1,2
|
± 2
|
c
(coarse) |
±
0,15
|
±
0,2
|
±
0,5
|
±
0,8
|
±
1,2
|
± 2
|
± 3
|
± 4
|
v
(very coarce grob) |
-
|
±
0,5
|
± 1
|
±
1,5
|
±
2,5
|
± 4
|
± 6
|
± 8
|
For nominal
sizes below 0,5 mm the limit measures are to be indicated
directly at the nominal measure.
Tabular 2 Limit measures for radius of curvature
and chamfer height
Tolerance
class
|
Limits in mm for
nominal sizes in mm
|
0,5
to 3
|
above 3
to 6
|
above 6
|
f
(fine) |
±
0,2
|
±
0,5
|
± 1
|
m
(medium) |
c
(coarse) |
±
0,4
|
± 1
|
± 2
|
v
(very coarse) |
Bei Nennmassen unter 0,5 mm
sind die Grenzabmasse direkt am Nennmass anzugeben.
Tabelle 3
Grenzabmasse für Winkelmasse
Tolerance class |
Limits in mm for
nominal sizes in mm
|
to
10
|
above 10
to
50
|
above 50
to
120
|
above 50
to
400
|
above 400
|
f
(fine) |
± 1
°
|
± 30
'
|
± 20
'
|
± 10
'
|
± 5
'
|
m
(medium) |
c
(coarse ) |
± 1
° 30 '
|
± 1
°
|
± 30
'
|
± 15
'
|
± 10
'
|
v
(very coarce) |
± 3
°
|
± 2
°
|
± 1
°
|
± 30
'
|
± 20
'
|
For nominal sizes below 0,5 mm
the limit measures are to be indicated directly at the
nominal measure. If general tolerances according to ISO
2768-1 are valid, the following has to be inserted
in the title box, i.e. for tolerance class medium
ISO 2768 – m or
general tolerance ISO 2768 – m
For new designs only the
general tolerance according to DIN ISO 2768-1 should be
valid. The limit measurements of the tolerance classes m and
f of DIN ISO 2768-1 are identic with those of DIN 7168-1.
General
tolerances for form and position
according to DIN
ISO 2768-2
DIN ISO
2768-2 is for simplifying drawing and fixes general
tolerances in three tolerance classes for form and position.
By choosing a special tolerance class exactly the precision
level common in workshops should be taken into account.
If
smaller tolerances are needed or bigger are more economical
these tolerances should be mentioned directly according
to ISO 1101.
General
tolerances for form and position should be used while
the tolerance principle according. to ISO 8015 is valid and
while this is mentioned in the drawing. This tolerance
principles says that no opposite relation between measure,
form and position tolerance exists (principle of
superposition).
Tolerance
class
|
General tolerances
for straightness and evenness in mm
|
Range of specified size in mm
|
to
10
|
above 10
to
30
|
above 30
to
100
|
above 100
to
300
|
above 300
to
1000
|
above 1000
to
3000
|
H
|
0,02
|
0,05
|
0,1
|
0,2
|
0,3
|
0,4
|
K
|
0,05
|
0,1
|
0,2
|
0,4
|
0,6
|
0,8
|
L
|
0,1
|
0,2
|
0,4
|
0,8
|
1,2
|
1,6
|
Tolerance
class
|
General tolerances for
straightness and evenness in mm
|
Range of specified size in mm
|
|
to
100
|
above 100
to
300
|
above 300
to
1000
|
above 1000
to
3000
|
H
|
0,2
|
0,3
|
0,4
|
0,5
|
K
|
0,4
|
0,6
|
0,8
|
1
|
L
|
0,6
|
1
|
1,5
|
2
|
Tolerance
class
|
General tolerances
for symmetry
|
Range of specified size in mm
|
|
to
100
|
above 100
to
300
|
above 300
to
1000
|
above 1000
to
3000
|
H
|
0,5
|
K
|
0,6
|
0,8
|
1
|
L
|
0,6
|
1
|
1,5
|
2
|
General tolerances for form
and position are valid for form elements for which form
and position tolerances are not indicated individually. They
are applicable for all characteristics of the form elements
accept cylinders, profiles of any line or surfaces, inclines,
coaxiality, position and total movement.
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