SIFT BEARING STORE CATALOG

31320XTimkenTapered Roller

31320X is a Timken tapered roller bearing, bore 100 mm, O.D. 215 mm, width 51 mm, dynamic rating 416 kN. Dimensions, drawing, interchanges and price.

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Bore d100mm
Outside dia. D215mm
Width B51mm
Dynamic Cr416kN
Static C0r526kN
Weight8.76kg
Cr / C0r0.79
Mean dia. dm157.5mm

Original catalogue drawing - Timken TRB Catalog, page 420

31320X Timken 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)100.000
Bore d (in)3.9370
Outside dia. D (mm)215.000
Outside dia. D (in)8.4646
Width B (mm)51.000
Overall width T (mm)56.500
Overall width T (in)2.2244
Cup width C (mm)35.000

Load ratings & speeds

Basic dynamic load rating Cr (lbs)93600
Basic static load rating Cor (lbs)118000
Basic dynamic load rating Cr (N)416000
Basic static load rating C0r (N)526000
Dynamic rating C1 (N, ISO)416000
Dynamic rating C1 (lbf, ISO)93600
Radial rating C90 (N)108000
Radial rating C90 (lbf)24300
Thrust rating Ca90 (N)152000
Thrust rating Ca90 (lbf)34300
Static rating C0 (N)526000
Static rating C0 (lbf)118000
Factor e0.83
Factor Y0.73
Factor K0.71
Geometry factor G1196.1
Geometry factor G230.1
Geometry factor Cg0.1200
Effective load centre a (mm)11.4

Weight

Weight (kg)8.76

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)4.0
Housing fillet r max (mm)3.0
Shaft shoulder da (mm)122.9
Shaft shoulder db (mm)144.0
Housing shoulder Da (mm)202.0
Housing shoulder Db (mm)183.9
Cage projection Aa (mm)9.7
Cage projection Ab (mm)8.6

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4104,0001023,386
669,33339213,083
852,0001,02434,133
1041,6002,15471,814
1527,7338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 416,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandTimken
Source catalogueTimken Tapered Roller Bearing Catalog (2016)
Catalogue pagep.420 (dimensions)
Series typeTS

ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
31320-XFAGTapered Roller10021551385 kN8.81
HR31320NSKTapered Roller10021551475 kN9.02

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
30220TimkenTapered Roller10018034301 kN3.76
30320TimkenTapered Roller10021547423 kN8.37
32020XTimkenTapered Roller10015032195 kN1.89
32220TimkenTapered Roller10018046368 kN4.92
32320TimkenTapered Roller10021573586 kN12.92
33020TimkenTapered Roller10015039251 kN2.36
33220TimkenTapered Roller10018063488 kN6.59
52394X/52618TimkenTapered Roller100157.163.5-2.47

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