SIFT BEARING STORE CATALOG

HR31320NSKTapered Roller

HR31320 is a NSK tapered roller bearing, bore 100 mm, O.D. 215 mm, width 51 mm, dynamic rating 475 kN. Dimensions, drawing, interchanges and price.

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Bore d100mm
Outside dia. D215mm
Width B51mm
Dynamic Cr475kN
Static C0r505kN
Limiting speed1,500rpm
Weight9.02kg
Cr / C0r0.94
Mean dia. dm157.5mm

Original catalogue drawing - NSK E1103, page 266

HR31320 NSK Tapered 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. D215 mmBore d100 mmWidth B51 mmCup width C35 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 diameter1003.937
DOutside diameter2158.4646
BInner-ring / bearing width512.0079
TOverall assembly width56.52.2244
CCup / outer-ring width351.378
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)100
Outside dia. D (mm)215
Width B (mm)51
Overall width T (mm)56.5
Cup width C (mm)35

Load ratings & speeds

Basic dynamic load rating Cr (lbs)106784
Basic static load rating Cor (lbs)113529
Basic dynamic load rating Cr (N)475000
Basic static load rating C0r (N)505000
Limiting speed - grease (rpm)1,500
Effective load centre a (mm)4

Weight

Weight (kg)9.02

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)3

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4118,7501023,386
679,16739213,083
859,3751,02434,133
1047,5002,15471,814
1531,6678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 475,000 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.266 (dimensions)

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

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
31320-XFAGTapered Roller10021551385 kN8.81
31320XTimkenTapered Roller10021551416 kN8.76

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
HR30220NSKTapered Roller10018034315 kN3.78
HR30220JNSKTapered Roller1001803457,300 lbs3.778
HR30320NSKTapered Roller10021547520 kN8.41
HR30320JNSKTapered Roller1002154795,500 lbs8.41
HR31320JNSKTapered Roller1002154767,200 lbs9.022
HR32020XJNSKTapered Roller10015032176,000 lbs1.95
HR32220NSKTapered Roller10018046400 kN5.05
HR32220JNSKTapered Roller1001804673,100 lbs5.053

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