Subject
|
Symbol
|
Description
|
Seal type
|
ZZ
|
Metal shields on both sides.
|
2RS
|
Rubber seals on both sides.
|
Z
|
Metal shield on one side.
|
RS
|
Rubber seal on one side.
|
Radial internal clearance
|
C2
|
Less than normal.
|
CN
|
Normal clearance. Is not indicated as a standard.
|
C3
|
Greater clearance than normal.
|
C4
|
Greater than C3.
|
C5
|
Greater than C4.
|
Other technical modifications
|
NR
|
Groove with inserted snap ring in outer ring.
|
N
|
Snap ring groove in the outer ring.
|
SS
|
Stainless steel.
|
Cage type
|
M
|
Brass cage ball guided.
|
MB
|
Brass cage, inner ring centered.
|
MA
|
Brass cage, outer ring centered.
|
Speed ratings
|
V
|
Normal vibration level. Is not indicated as a standard.
|
V2
|
Lower vibration level than normal.
|
V3
|
Lower vibration level than V2.
|
V4
|
Lower vibration level than V3.
|
Tolerances
|
P0
|
Normal tolerance level. Is not indicated as a standard.
|
P6
|
Greater tolerance level than P0.
|
P5
|
Greater tolerance level than P6.
|