1, the internal structure

CA - with brass Solid Cage
CD - with stamping Cage
High load Spherical Roller Bearing
E - high load Cylindrical Roller Bearings
H - High Load Thrust Spherical Roller Bearing

2, Materials

g - rings, roller bearings for carburizing steel imports
h - rings, ball bearings for stainless steel imports

3, Cage imported bearings

M - Copper Alloy Solid Bearing Cage imports
T - synthetic resin imports Cage bearings
W - stamping Cage
V - No Cage

4, seals,shield

Z, ZS - side with steel dust cover
ZZ, ZZS - on both sides with steel dust cover
D, DU - side with rubber ring-contact bearings imports
DD, DDU - contact on both sides with rubber ring imported bearings
V - side with non-contact rubber seals
VV - side with non-contact rubber seals imported bearings

5, ferrule shape
 
K - conical hole, taper 1:12
K30 - conical hole, taper 1:30
E - Ring has on incision or hole
E4 - with tanks on the outer ring, hole import bearings
N - the outer ring outer diameter with stopper groove
NR - outer diameter of groove with stop, stop ring

6, co-ordination and liner

DB - the installation of back-to-back pairs of imports of bearings
DT - imported bearings installed in pairs in series
+ K - outer band bearing liner imports
+ L - inner belt liner
+ KL - inner, outer band liner
H - bear in determining the structure of sets of code
AH - the demolition of the structure of sets of code
HJ - L-type file structure, code-named edge lap

7, special specifications

X26 - the use of temperature is below 150 ℃  on imports of bearings
X28 - the use of temperature is below  200 ℃ on imports of bearings
X29 - the use of temperature is below  250 ℃ on imports of bearings
S11 - Spherical Roller Bearing, woriking below  200 ℃