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¡¡Technology information >>Accuracy >>ABEC-7
TOLERANCE CLASS ABEC-7
INNER RING Tolerance in um.
d
^dmp
^ds
Vdp2)
Vdmp
Kia
Sd
Sia
^Bs
VBs
Diameter Series
mm
7,8,9
1,7,2,3,4
over
incl.
high
low
high
low
max.
max.
max.
max.
max.
high
low
max.
1)0.6
2.5
0
-4
0
-4
4
3
2
2.5
3
3
0
-40
2.5
2.5
10
0
-4
0
-4
4
3
2
2.5
3
3
0
-40
2.5
10
18
0
-4
0
-4
4
3
2
2.5
3
3
0
-80
2.5
18
30
0
-5
0
-5
5
4
2.5
3
4
4
0
-120
2.5
30
50
0
-6
0
-6
6
4
3
4
4
4
0
-120
3
50
80
0
-7
0
-7
7
5
3.5
4
5
5
0
-150
4
1)0.6 is included.
2)Diameter Series 7 refers to those defined by GB273.3 as the miniature bearing series 7.
 
OUTER RING Tolerance in um.
d
^Dmp
^Ds
Vdp2)
VDmp
Kia
SD
Sea
^Cs
VCs
mm
Diameter Series
7,8,9
1,7,2,3,4
over
incl.
high
low
high
low
max.
max.
max.
max.
max.
high
low
max.
1)2.5
6
0
-4
0
-4
4
3
2
3
4
5
Identical to
^Bs
of inner ring
of same bearing
2.5
6
18
0
-4
0
-4
4
3
2
3
4
5
2.5
18
30
0
-5
0
-5
5
4
2.5
4
4
5
2.5
?
?
30
50
0
-6
0
-6
6
5
3
5
4
5
2.5
50
80
0
-7
0
-7
7
5
3.5
5
4
5
3
80
120
0
-8
0
-8
8
6
4
6
5
6
4
120
150
0
-9
0
-9
9
7
5
7
5
7
5
1)2.5 is included.
2)These windage is applicable for diameter series 1.7.2.3.and 4.
3)Not applicable for closed type bearings
4)Diameter Series 7 refers to those defined by GB273.3 as the miniature bearing series 7.