designations for deep groove ball bearings

material :

SS ( W ) ----- stainless steel

C ----- hybrid bearing ( ceramic balls )

CE ----- all ceramic bearing

bearing type :

6 ----- single row deep groove ball bearing

4 ----- double row deep groove ball bearing

dimension series :

17 ----- ultra thin cross section

18 ----- very thin cross section

19 ----- thin cross section

0 ----- extra light series

2 ----- light series

3 ----- medium series

4 ----- massive series

bore code :

00 ----- 10 mm

01 ----- 12 mm

02 ----- 15 mm

03 ----- 17 mm

04 ----- 20 mm ( when bore code is greater than 04 , the bore size = code * 5 )

seal type :

RS ----- rubber seal on one side ( 2RS - rubber seals on both sides )

Z ----- steel seal on one side ( ZZ - steel seals on both sides )

none ----- open deisgn

radial inernal clearance :

C3 ----- larger than CN , increased internal clearance

tolerance class :

P0 ----- tolerance class , P2 < P4 < P5 < P6 < P0 based on DIN standard