Ball and Roller Bearings - Ntn-snr.com

Bearing Tolerances
Inner ring
axial runout
(with side)
Sia
class 4
max
3
4
4
4
5
7
8
Inner ring width deviation
∆Bs
∆Ts
class 0,6 class 6X class 4,5
class 0,6 class 6X class 4,5
high low high low high low high low high low high low
0
0
0
0
0
0
0
0
0
0
0
0
0
-120
-120
-120
-150
-200
-250
-300
-350
-400
-450
-500
-750
-1,000
0
0
0
0
0
0
0
0
0
-50
-50
-50
-50
-50
-50
-50
-50
-50
0
0
0
0
0
0
0
-200
-200
-240
-300
-400
-500
-600
Overall width deviation of assembled single
row tapered roller bearing, or height deviation
+200
+200
+200
+200
+200
+350
+350
+350
+400
0
0
0
0
-200
-250
-250
-250
-400
+100
+100
+100
+100
+100
+150
+150
+200
+200
0
0
0
0
0
0
0
0
0
+200
+200
+200
+200
+200
+350
+350
-200
-200
-200
-200
-200
-250
-250
Overall width deviation
of assembled double rows
tapered roller bearing or
height eviation
∆B1s,
+240
+300
+400
+500
+600
+700
+800
+900
+1,000
+1,500
+1,500
∆C1s
class 0,6,5
high low
-240
-300
-400
-500
-600
-700
-800
-900
-1,000
-1,500
-1,500
Overall width deviation
of assembled four rows
tapered roller bearing
or height eviation
∆B2s,∆C2s
+500
+600
+750
+900
+1,000
+1,200
+1,200
+1,500
+1,500
Unitm
class 0,6,5
high low
-500
-600
-750
-900
-1,000
-1,200
-1,200
-1,500
-1,500
Outer ring axial
runout
Unitm
Outer ring width deviation
∆Cs
Sea
class
4 class 0,6,5,4
4
class 6X
max sup. inf. sup. inf.
5
5
5
6
7
8
10
10
13
Identical to ∆Bs
inner ring of
same bearing
0
0
0
0
0
0
0
0
0
0
0
-100
-100
-100
-100
-100
-100
-100
-100
-100
-100
-100
Table 6.4 (3) Effective width of outer and inner rings with roller
Nominal
bore
diameter
d
mm
over incl.
10
18
30
50
80
120
180
250
315
T1
18
30
50
80
120
180
250
315
400
Effective width deviation
of roller and inner ring assembly
of tapererd roller bearing
∆T1s
class 0 class 6X
high low high low
+100
+100
+100
+100
+100
+150
+150
+150
+200
0
0
0
0
-100
-150
-150
-150
-200
+50
+50
+50
+50
+50
+50
+50
+100
+100
0
0
0
0
0
0
0
0
0
Master cup
sub-unit
T2
Unit
Tapered roller bearing outer
ring effective width deviation
+100
+100
+100
+100
+100
+200
+200
+200
+200
∆T2s
class 0 class 6X
high low high low
0
0
0
0
-100
-100
-100
-100
-200
Master cone
sub-unit
+50
+50
+50
+50
+50
+100
+100
+100
+100
0
0
0
0
0
0
0
0
0
4 To be applied for nominal bore diameters
d
d
A-37