51256 Thrust Ball Bearing 280x380x90mm

51256        Thrust ball bearing

Inner Diameter (ID):    280       mm
Outer diameter (OD):   380    mm
Width/Height:  90     mm
Weight:   27.8    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)

51256       Cage structure:

TYN:polyamide resin cage
TR : Phenolic resin cage

BRASS:Brass cage

51256       Combination of mark:

1/750V 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

51256    Preloaded mark: 

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

51256     Precision grade: 

P2 : ISO2;    

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