How to decode bearing part numbers? Click on one of the codes below!
The first position in a bearing part numbers refers to type, which are fairly agreed upon throughout the industry.
6
Miniature bearing - extra small
6(1)8
Thin section bearing - extra-ultra- light
6(1)9
Thin section bearing - ultra-light
160
Thin section bearing - extra-light
161
Thin section bearing- extra-extra-light
60
Ball bearing - extra-light
620
Ball bearing - light-wide-type
630
Ball bearing - medium-wide-type
42
Double row ball bearing - light
43
Double row ball bearing - medium
Bearings with a bore diameter of 10, 12, 15 or 17 mm have the following size code identifications:
If your numbers are not any of the above, add them together and multiply by 5. This will give you the bore size in millimeters.
If there is no fourth digit, like in the common 608 bearing, then the last number equals the bore size - 8mm in this case.
The last portion of a part number refers to the ball bearing's special characteristics.
The last portion of a part number refers to the ball bearing's special characteristics.
ZZ
Double shielded. Dust proof.
2Z
Double shielded. Dust proof.
2RS1
Double contact seal. Splash proof.
2RSH
Double contact seal. Splash proof.
2RSR
Double contact seal. Splash proof.
2HRS
Double contact seal. Splash proof.
DDU
Double contact seal. Splash proof.
LLU
Double contact seal. Splash proof.
2RSL
Double low / non friction seal. Splash proof.
2RU
Double low / non friction seal. Splash proof.
LLB
Double low / non friction seal. Splash proof.
VV
Double low / non friction seal. Splash proof.
N
Snap ring groove in the outer ring.
NR
Snap ring groove in the outer ring, with snap ring.
The last portion of a part number refers to the ball bearing's special characteristics.
CN
Normal radial internal clearance
C1
Radial internal clearance smaller than C2
C2
Radial internal clearance smaller than normal
C3
Radial internal clearance greater than normal
C4
Radial internal clearance greater than C3
C5
Radial internal clearance greater than C4
Due to manufacturer differences, not all ball bearings fit this structure. Contact the experts at ERIKS for assistance in reading your unique part number and replacing your ball bearing.