SIFT BEARING STORE CATALOG

NU321ENSKCylindrical Roller

NU321E is a NSK cylindrical roller bearing, bore 105 mm, O.D. 225 mm, width 49 mm, dynamic rating 525 kN. Dimensions, drawing, interchanges and price.

Request a quoteEmail usSearch the catalog
Bore d105mm
Outside dia. D225mm
Width B49mm
Dynamic Cr525kN
Static C0r480kN
Weight9.84kg
Cr / C0r1.09
Mean dia. dm165mm

Original catalogue drawing - NSK E1103, page 239

NU321E NSK Cylindrical Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

DdBOutside dia. D225 mmBore d105 mmWidth B49 mm

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

SymbolDimensionmminch
dBore diameter1054.1339
DOutside diameter2258.8583
BInner-ring / bearing width491.9291
rChamfer (min)30.1181

Notes

Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)105
Outside dia. D (mm)225
Width B (mm)49

Load ratings & speeds

Basic dynamic load rating Cr (lbs)118025
Basic static load rating Cor (lbs)107908
Basic dynamic load rating Cr (N)525000
Basic static load rating C0r (N)480000

Weight

Weight (kg)9.84

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)3
Chamfer r1 min (mm)3

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4131,2501023,386
687,50039213,083
865,6251,02434,133
1052,5002,15471,814
1535,0008,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 525,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandNSK
Source catalogueNSK CAT. No. E1103 (metric)
Catalogue pagep.239 (dimensions)

Load ratings in newtons, weights in kg, limiting speeds for grease and oil lubrication.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
1321-MFAGBall10522549158 kN10.3
6321FAGBall10522549188 kN8.7
30321-XLFAGTapered Roller10522549530 kN10.5
7321-B-MPFAGPrecision / Angular Contact10522549209 kN9
7321-B-XL-MPFAGPrecision / Angular Contact10522549225 kN9.3

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
1321NSKBall10522549169 kN9.58
6321NSKBall1052254941,300 lbs8.119
7321BNSKBall1052254942,800 lbs9.389
321NSKCylindrical Roller1052254971,500 lbs8.618
HR30321NSKTapered Roller10522549560 kN9.52
HR30321JNSKTapered Roller10522549102,000 lbs9.525
HR31321JNSKTapered Roller1052254976,400 lbs10.043
7321NSKPrecision / Angular Contact10522549210 kN9.43

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
1021NSKCylindrical Roller1051602624,400 lbs1.805
221NSKCylindrical Roller1051903645,100 lbs4.051
321NSKCylindrical Roller1052254971,500 lbs8.618
421NSKCylindrical Roller10526060111,000 lbs17.237
NU1021NSKCylindrical Roller10516026134 kN1.83
1020NSKCylindrical Roller1001502420,900 lbs1.438
220NSKCylindrical Roller1001803440,900 lbs3.402
2220NSKCylindrical Roller1001804655,200 lbs4.536

Request a quotation for NU321E

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.