N1921-K-M1-SP Spherical Roller Bearings 105x145x20mm

N1921-K-M1-SP  Spherical roller Bearings

Inner Diameter (ID):105   mm
Outer diameter (OD):145   mm

Width/Height:20  mm    

Weight:0.959KG

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

N1921-K-M1-SP   Material: No mark:Steel ball(SUJ2); SN24:Ceramic ball(Si3N4)

N1921-K-M1-SP   Cage structure:
TYN:polyamide resin cage
TR : Phenolic resin cageBRASS:Brass cage

N1921-K-M1-SP 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

N1921-K-M1-SP   Preloaded mark: 

N1921-K-M1-SP  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

N1921-K-M1-SP  E: Bearing load capacity is higher.E type bearing outer ring with a groove and three oil hole

N1921-K-M1-SP  Precision grade: 
P2 : ISO2;    
P4 : ISO4;  
P5 : ISO5
P3 : Special grade(Dimensional accuracy:ISO4,Rotation accuracy:ISO2)
p4Y: Special grade

N1921-K-M1-SP   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.