Examples of basic designations for needle roller bearings
|
Principal dimensions e.g. |
Bearing type and dimension e.g. |
||||
| Needle roller and cage assemblies | K 3 x 5 x 7 | ||||
| 3
|
Diameter under rollers | ||||
| 5
|
Outside diameter roller complement | ||||
| 7
|
Width needle roller and cage assembly | ||||
| Drawn cup needle roller bearings | HK 1210 | ||||
| 12
|
Diameter under rollers | ||||
| 10
|
Width | ||||
| Needle roller bearings with machined rings with flanges | NK 5/10 or NKI 5/12 | RNA 4900 or NA 4905 | |||
| 5
|
Diameter under rollers / Bore diameter | 49
|
Bearing series | ||
| 10
|
Width | 00
|
Size code of bearing bore (d / 5, use d of a corresponding bearing with inner ring) | ||
| NKS 22 | RNA 49/22 | ||||
| 22
|
Diameter under rollers / Bore diameter | 49
|
Bearing series | ||
| 22
|
Diameter under rollers | ||||
| Needle roller bearings with machined rings without flanges | RNAO 15 x 23 x 13 or NAO 25 x 28 x 13 | ||||
| 15
|
Diameter under rollers / Bore diameter | ||||
| 23
|
Outside diameter | ||||
| 13
|
Width outer ring | ||||
| Alignment needle roller bearings | RPNA 15/28 | ||||
| 15
|
Diameter under rollers / Bore diameter | ||||
| 28
|
Outside diameter | ||||
| Combined needle roller bearings | with thrust bearings
NX 7 / NKX 10 |
with angular contact ball bearings
NKIA 5905 |
|||
| 7
|
Diameter under rollers | 59
|
Bearing series | ||
| 05
|
Size code of bearing bore (d / 5 = 5) | ||||
| Needle rollers | RN - 1 x 7,8 | ||||
| 1
|
Outside diameter | ||||
| 7,8
|
Length | ||||
| Needle roller bearing inner rings | IR 5 x 8 x 12 | ||||
| 5
|
Bore diameter | ||||
| 8
|
Raceway diameter | ||||
| 12
|
Width |
