NTN - Precision Rolling Bearings

NTN Main Spindle Bearings
Perpendicularity of Width deviation
inner ring face
with respect to the bore ΔBs
Sd
Single bearing
Class 5 Class 4 Class 2 Class 5 Class 4 Class 2
max
high low high low
Width variation
VBs
Unit:
Class 5 Class 4 Class 2
max
8
4
1.5
0
120
0
120
5
2.5
1.5
8
8
9
4
5
5
1.5
1.5
2.5
0
0
0
120
150
200
0
0
0
120
150
200
5
6
7
3
4
4
1.5
1.5
2.5
10
10
11
6
6
7
2.5
4
5
0
0
0
250
250
300
0
0
0
250
300
350
8
8
10
5
5
6
2.5
4
5
13
15
0 350
0 400
13
15
Perpendicularity of
outer ring outside surface
with respect to the face
SD
Class 5 Class 4 Class 2
max
Width deviation
ΔCs
All classes
Unit:
Width variation
VCs
Class 5 Class 4 Class 2
max
8
8
9
10
10
4
4
5
5
5
1.5
1.5
2.5
2.5
2.5
Identical to ΔBs
relative to d on the
same bearing.
5
6
8
8
8
2.5
3
4
5
5
1.5
1.5
2.5
2.5
2.5
11
13
13
7
8
10
4
5
7
10
11
13
7
7
8
4
5
7
15
18
20
15
18
20
207