Spherical Plain Bearings - Tolerances
Spherical Plain Bearing tolerances apply to outer ring without surface treatment or splitting. Some bearings receive a phosphate coating and/or a MoS2 coating, both of which will add to the bearing’s OD dimension.
The outer rings become slightly out-of-round due to splitting. The roundness of the outer ring is restored once it is fitted in a housing bore produced in accordance with the specifications.
Please note that measurements taken of the outside diameter of the unfitted, split bearing cannot be used as the original actual values for the outside diameter.
Below are the various tolerances for inner and outer rings of spherical plain bearings supplied by AST Bearings and are organized by product series:
Tolerances for all AST Radial Spherical Plain Bearings (Except for Series GEBKS, GEBJS, GEBJC, GEFZS, GEFZC, GEFZT, GEKXS2RS)
Inner Ring Tolerances
|
d
(mm) |
Δ dmp
(µm) |
Δ dmp*
(µm) |
Vdp
(µm) |
Vdmp
(µm) |
Vdp*
(µm) |
Vdmp*
(µm) |
Δ Bs
(µm) |
Δ Bs*
(µm) |
|||||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
max
|
max
|
max
|
max
|
max
|
min
|
max
|
min
|
|
?
|
18
|
0
|
-8
|
18
|
0
|
8
|
6
|
18
|
14
|
0
|
-120
|
0
|
-180
|
|
18
|
30
|
0
|
-10
|
21
|
0
|
10
|
8
|
21
|
16
|
0
|
-120
|
0
|
-210
|
|
30
|
50
|
0
|
-12
|
25
|
0
|
12
|
9
|
25
|
19
|
0
|
-120
|
0
|
-250
|
|
50
|
80
|
0
|
-15
|
30
|
0
|
15
|
11
|
30
|
22
|
0
|
-150
|
0
|
-300
|
|
80
|
120
|
0
|
-20
|
35
|
0
|
20
|
15
|
35
|
26
|
0
|
-200
|
0
|
-350
|
|
120
|
180
|
0
|
-25
|
40
|
0
|
25
|
19
|
40
|
30
|
0
|
-250
|
0
|
-400
|
|
180
|
250
|
0
|
-30
|
46
|
0
|
30
|
23
|
46
|
35
|
0
|
-300
|
0
|
-460
|
|
250
|
315
|
0
|
-35
|
52
|
0
|
35
|
26
|
52
|
39
|
0
|
-350
|
0
|
-520
|
|
315
|
400
|
0
|
-40
|
57
|
0
|
40
|
30
|
57
|
43
|
0
|
-400
|
0
|
-570
|
|
400
|
500
|
0
|
-45
|
?
|
?
|
45
|
34
|
?
|
?
|
0
|
-450
|
?
|
?
|
|
500
|
630
|
0
|
-50
|
?
|
?
|
50
|
38
|
?
|
?
|
0
|
-500
|
?
|
?
|
|
630
|
800
|
0
|
-75
|
?
|
?
|
75
|
56
|
?
|
?
|
0
|
-750
|
?
|
?
|
*Tolerances apply to the GEEW-ES series only
Outer Ring Tolerances
|
D
(mm) |
Δ Dmp (µm)
|
VDp
(µm) |
VDmp
(µm) |
Δ Cs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
max
|
max
|
min
|
|
?
|
18
|
0
|
-8
|
10
|
6
|
0
|
-240
|
|
18
|
30
|
0
|
-9
|
12
|
7
|
0
|
-240
|
|
30
|
50
|
0
|
-11
|
15
|
8
|
0
|
-240
|
|
50
|
80
|
0
|
-13
|
17
|
10
|
0
|
-300
|
|
80
|
120
|
0
|
-15
|
20
|
11
|
0
|
-400
|
|
120
|
150
|
0
|
-18
|
24
|
14
|
0
|
-500
|
|
150
|
180
|
0
|
-25
|
33
|
19
|
0
|
-500
|
|
180
|
250
|
0
|
-30
|
40
|
23
|
0
|
-600
|
|
250
|
315
|
0
|
-35
|
47
|
26
|
0
|
-700
|
|
315
|
400
|
0
|
-40
|
53
|
30
|
0
|
-800
|
|
400
|
500
|
0
|
-45
|
60
|
34
|
0
|
-900
|
|
500
|
630
|
0
|
-50
|
67
|
38
|
0
|
-1000
|
|
630
|
800
|
0
|
-75
|
100
|
56
|
0
|
-1100
|
|
800
|
1000
|
0
|
-100
|
135
|
75
|
0
|
-1200
|
|
1000
|
1250
|
0
|
-125
|
190
|
125
|
0
|
-1300
|
Tolerances for AST Series GEBKS
Inner Ring Tolerances
|
d
(mm) |
Δdmp
(µm) |
ΔBs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
?
|
6
|
12
|
0
|
0
|
-100
|
|
6
|
10
|
15
|
0
|
0
|
-100
|
|
10
|
18
|
18
|
0
|
0
|
-100
|
|
18
|
30
|
21
|
0
|
0
|
-100
|
Outer Ring Tolerances
|
D
(mm) |
ΔDmp
(µm) |
ΔCs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
10
|
18
|
0
|
-11
|
100
|
-100
|
|
18
|
30
|
0
|
-13
|
100
|
-100
|
|
30
|
50
|
0
|
-16
|
100
|
-100
|
|
50
|
80
|
0
|
-19
|
100
|
-100
|
Tolerances for AST Series GEBJS, GEBJC
Inner Ring Tolerances
|
d
(mm) |
A dmp
(µm) |
A Bs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
—
|
6
|
12
|
0
|
0
|
-100
|
|
6
|
10
|
15
|
0
|
0
|
-100
|
|
10
|
18
|
18
|
0
|
0
|
-100
|
|
18
|
30
|
21
|
0
|
0
|
-100
|
Outer Ring Tolerances
|
D
(mm) |
Δ Dmp
(µm) |
Δ Cs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
10
|
18
|
0
|
-11
|
0
|
-240
|
|
18
|
30
|
0
|
-13
|
0
|
-240
|
|
30
|
50
|
0
|
-16
|
0
|
-240
|
|
50
|
80
|
0
|
-19
|
0
|
-300
|
Tolerances for AST Series GEZS, GEFZC
Inner Ring Tolerances
|
d
(mm) |
Δ dmp
(µm) |
Δ Bs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
—
|
6
|
38
|
-13
|
130
|
-130
|
|
6
|
10
|
38
|
-13
|
130
|
-130
|
|
10
|
18
|
38
|
-13
|
130
|
-130
|
|
18
|
30
|
38
|
-13
|
130
|
-130
|
Outer Ring Tolerances
|
D
(mm) |
Δ Dmp
(µm) |
Δ Cs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
10
|
18
|
0
|
-18
|
130
|
-130
|
|
18
|
30
|
0
|
-18
|
130
|
-130
|
|
30
|
50
|
0
|
-18
|
130
|
-130
|
Tolerances for AST Series GEKXS2RS
Inner Ring Tolerances
|
d
(mm) |
Δ dmp
(µm) |
Δ Bs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
18
|
30
|
33
|
0
|
50
|
-110
|
|
30
|
50
|
39
|
0
|
50
|
-110
|
|
50
|
60
|
46
|
0
|
50
|
-140
|
Outer Ring Tolerances
|
D
(mm) |
Δ Dmp
(µm) |
Δ Cs
(µm) |
|||
|
over
|
incl.
|
max
|
min
|
max
|
min
|
|
50
|
80
|
30
|
11
|
0
|
-130
|
|
80
|
120
|
35
|
13
|
0
|
-130
|
|
120
|
150
|
40
|
15
|
0
|
-130
|
Key for Tolerance Tables
|
d
|
Bearing bore diameter, nominal
|
|
Δdmp
|
Single plane mean bore diameter deviation
|
|
Vdp
|
Bore diameter variation in a single radial plane
|
|
Vdmp
|
Mean bore diameter deviation
|
|
ΔBs
|
Deviation of a single width of the inner ring
|
|
B
|
Width of the inner ring, nominal
|
|
D
|
Bearing outside diameter, nominal
|
|
ΔDmp
|
Single plane mean outside diameter deviation
|
|
VDp
|
Outside diameter variation in a single radial plane
|
|
VDmp
|
Mean outside diameter variation
|
|
ΔCs
|
Deviation of a single width of the outer ring
|
|
C
|
Width of outer ring, nominal
|