|
Accuracy
of Roller Bearings
Dimensional Accuracy
- Tolerances for bore & Outside
diameters, ring & bearing width.
- Tolerances for inscribed &
circumscribed circle diameters of rollers.
- Tolerances for chamfer dimensions.
- Tolerances for width variation.
- Tolerances for tapered bore diameters.
Running Accuracy
- Permissible radial runout of inner and outer rings.
- Permissible face runout with raceway inner and outer rings.
- Permissible inner ring face runout with bore.
- Permissible outer ring variation of outside surface generatrix
inclination with face.
- Permissible raceway to back face thickness variation of thrust
bearings.
|
Equivalent Standard of Ball Bearing
Tolerances
|
| AFBMA
* |
ABEC-1 |
ABEC-3 |
ABEC-5 |
ABEC-7 |
ABEC-9 |
| JIS
** |
Class
0 |
Class
6 |
Class
5 |
Class
4 |
Class
2 |
| DIN
*** |
P
0 |
P
6 |
P
5 |
P
4 |
P
2 |
* AFBMA: Anti-Friction Bearing
Manufacturers Association
** JIS: Japanese Industrial Standards
*** DIN: Deutsch Industrie Norm
Standard
ABEC Tolerances
Inner Rings (all tolerances in
micrometers) |
Bearing
Bore
(mm) |
Bore
Diameter*
+.00mm to |
Width
Variation |
Radial
Runout |
Side
Runout
with Bore |
Raceway
Runout
with Side |
Width
Inner
&
Outer Rings |
ABEC
Rating |
| 1 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
1 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
1-3-5-7 |
9 |
| 0
- 10 |
-3 |
-2 |
-2 |
-1.5 |
-1 |
3 |
2 |
1 |
.5 |
3 |
2 |
1.5 |
1 |
.5 |
3 |
3 |
1 |
.5 |
6 |
3 |
1 |
.5 |
-50 |
-10 |
| 10
- 18 |
-3 |
-2 |
-2 |
-1.5 |
-1 |
4 |
2 |
1 |
.5 |
4 |
3 |
1.5 |
1 |
.5 |
4 |
3 |
1 |
.5 |
6 |
3 |
1 |
.5 |
-50 |
-20 |
* D(min) (the smallest single diameter of a bore) and D(max)
(the largest single diameter of a bore) may fall outside limits
shown. [D(min)+D(max)]/2 will be within bore diameters
tabulated.
Standard ABEC
Tolerances
Outer Rings (all tolerances in
micrometers) |
Bearing
O.D.
(mm) |
Outside Diameter*
+.00mm to |
Width
Variation |
Radial
Runout |
Raceway
Runout
with Side |
Outside
Diameter
Runout with
Side |
ABEC
rating |
1 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
1 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
3 |
5 |
7 |
9 |
| 0 - 18 |
-4 |
-3 |
-2 |
-2 |
-1 |
4 |
2 |
1 |
.5 |
6 |
4 |
2 |
1.5 |
.5 |
8 |
3 |
2 |
.5 |
4 |
3 |
1.5 |
.5 |
| 18 - 30 |
-4 |
-3 |
-2 |
-2 |
-1.5 |
4 |
2 |
1 |
.5 |
6 |
4 |
2 |
1.5 |
1 |
8 |
3 |
2 |
1 |
4 |
3 |
1.5 |
.5 |
* D(min) (the smallest single diameter of an O.D.) and D(max)
(the largest single diameter of an O.D.) may fall outside limits
shown. [D(min)+D(max)]/2 will be within outside diameters
tabulated.
|
