SIFT BEARING STORE CATALOG

30238TimkenTapered Roller

30238 is a Timken tapered roller bearing, bore 190 mm, O.D. 340 mm, width 55 mm, dynamic rating 839 kN. Dimensions, drawing, interchanges and price.

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Bore d190mm
Outside dia. D340mm
Width B55mm
Dynamic Cr839kN
Static C0r1390kN
Weight22.49kg
Cr / C0r0.6
Mean dia. dm265mm

Original catalogue drawing - Timken TRB Catalog, page 428

30238 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. D340 mmBore d190 mmWidth B55 mmCup width C46 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 diameter1907.4803
DOutside diameter34013.3858
BInner-ring / bearing width552.1654
TOverall assembly width602.3622
CCup / outer-ring width461.811
rChamfer (min)40.1575

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)190.000
Bore d (in)7.4803
Outside dia. D (mm)340.000
Outside dia. D (in)13.3858
Width B (mm)55.000
Overall width T (mm)60.000
Overall width T (in)2.3622
Cup width C (mm)46.000

Load ratings & speeds

Basic dynamic load rating Cr (lbs)189000
Basic static load rating Cor (lbs)312000
Basic dynamic load rating Cr (N)839000
Basic static load rating C0r (N)1390000
Dynamic rating C1 (N, ISO)839000
Dynamic rating C1 (lbf, ISO)189000
Radial rating C90 (N)217000
Radial rating C90 (lbf)48900
Thrust rating Ca90 (N)162000
Thrust rating Ca90 (lbf)36400
Static rating C0 (N)1390000
Static rating C0 (lbf)312000
Factor e0.44
Factor Y1.38
Factor K1.34
Geometry factor G1940.6
Geometry factor G2103.1
Geometry factor Cg0.1390
Effective load centre a (mm)7.1

Weight

Weight (kg)22.49

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)5.0
Housing fillet r max (mm)4.0
Shaft shoulder da (mm)214.9
Shaft shoulder db (mm)222.0
Housing shoulder Da (mm)318.5
Housing shoulder Db (mm)310.0
Cage projection Aa (mm)3.8
Cage projection Ab (mm)10.7

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4209,7501023,386
6139,83339213,083
8104,8751,02434,133
1083,9002,15471,814
1555,9338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 839,000 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.428 (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
6238-MFAGBall19034055255 kN22.6
QJ238-N2-MPAFAGBall19034055455 kN23.8
N238-E-M1FAGCylindrical Roller19034055680 kN22.8
NJ238-E-M1FAGCylindrical Roller19034055680 kN23.2
NU238-E-M1FAGCylindrical Roller19034055680 kN22.8
NUP238-E-M1FAGCylindrical Roller19034055680 kN23.5
20238-MBFAGSpherical Roller19034055650 kN22.5
30238FAGTapered Roller19034055530 kN20.8
30238-XLFAGTapered Roller19034055800 kN21.4
B7238-C-T-P4SFAGPrecision / Angular Contact19034055315 kN20

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
32038XTimkenTapered Roller19029064719 kN14.6
32238TimkenTapered Roller190340921360 kN36.36
32938TimkenTapered Roller19026045398 kN6.91
JM238848/M238810TimkenTapered Roller190269.8855.56548 kN9.51
JM738249/JM738210TimkenTapered Roller19026044407 kN6.85
X32038XM/Y32038XMTimkenTapered Roller1902901461250 kN31.16
JM241538/JM241511TimkenTapered Roller189.95290138975 kN30.43
67886/67820TimkenTapered Roller190.08266.76.4-7.81

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