NN3009K/W33 Cylindrical Roller Bearings 45x75x23mm

 NN3009K/W33       cylindrical roller bearings

 Inner Diameter (ID):    45  mm
Outer diameter (OD):   75 mm
Width/Height:  23   mm     

Weight: 0.4 KG

Number of Row: Double row
Seals type: open
Characteristics: high speed

Internal structure: N.NU.NJ.NF.NUP.NFP.NH(NJ+HJ).NN.NNU.NNF.FC.FCD

Material: No mark:Steel ball(SUJ2); SN24:Ceramic ball(Si3N4)
NN3009K/W33 Cage structure:
TYN:polyamide resin cage
TR : Phenolic resin cage

BRASS:Brass cage

NN3009K/W33 Type cylindrical roller bearings
1.N bearing

2.NU type bearings

3.NJ type bearings

4.NUP bearings

5.NN bearings

NN3009K/W33 Preloaded mark: 
CAC: Large size bearings, roller is symmetrical
ECAC : Bearing roller and race surface by optimizing processing, helps to guide roller

CA : Roller is symmetrical, inner ring without guard.Each column roller with stamping steel cage
CC: Bearing roller and race surface by optimizing processing, help guide roller, and can reduce friction

E: Bearing load capacity is higher.E type bearing outer ring with a groove and three oil hole

NN3009K/W33    Precision grade: 

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

NN3009K/W33  Bearing clearance

C1-1 set of the clearance, clearance is less than 2 groups.
C2 - clearance conform to the standards stipulated by the two groups, group windage is less than 0.
C0 - clearance conform to the standards stipulated by the 0 group, code omitted, don't say.
C3 - clearance conform to the standards stipulated by the three groups, group clearance greater than 0.
C4 - clearance conform to the standards stipulated by the four groups, clearance is greater than three groups.
Of the C5 - clearance 5 groups, clearance is greater than the four groups.
When clearance code and tolerance grade bearing code P4, P5 or P6, saves clearance code C.