B12 Thrust Ball Bearing 30.25x53.19X19.05mm

 B12    Thrust ball bearing
Inner Diameter (ID):30.25  mm
Outer diameter (OD): 53.19  mm
Width/Height: 19.05 mm
Weight:0.64    KG

Material:chrome steel(GCR15)
Number of Row: single rows
Seals type: open
Contact Angle:C=15°;AC=25°,A=30°; B=40°
Material: No mark:Steel ball(SUJ2); SN24:Ceramic ball(Si3N4)

B12   Cage structure:
TYN:polyamide resin cage
TR : Phenolic resin cage

BRASS:Brass cage

B12      Combination of mark:
SU:Universal combination (single row)
DU:Universal combination (double rows)
DB: Back-to-back combination
DF: Face-to-face combination
DT: Parallel combination
DBD.DFD.DTD:  Three rows
DBB.DFF.DBT.DFT.DTT: Four rows

B12  Preloaded mark: 
EL: Micro preloaded
L : Light preload
M : Medium preloade
H : Heavy preloaded

B12  Precision grade: 
P2 : ISO2;    
P4 : ISO4;  
P5 : ISO5
P3 : Special grade(Dimensional accuracy:ISO4,Rotation accuracy:ISO2)
p4Y: Special grade