SIFT BEARING STORE CATALOG

30203TimkenTapered Roller

30203 is a Timken tapered roller bearing, bore 17 mm, O.D. 40 mm, width 12 mm, dynamic rating 21.3 kN. Dimensions, drawing, interchanges and price.

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Bore d17mm
Outside dia. D40mm
Width B12mm
Dynamic Cr21.3kN
Static C0r19.9kN
Weight0.08kg
Cr / C0r1.07
Mean dia. dm28.5mm

Original catalogue drawing - Timken TRB Catalog, page 396

30203 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. D40 mmBore d17 mmWidth B12 mmCup width C11 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 diameter170.6693
DOutside diameter401.5748
BInner-ring / bearing width120.4724
TOverall assembly width13.250.5217
CCup / outer-ring width110.4331
rChamfer (min)10.0394

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)17.000
Bore d (in)0.6693
Outside dia. D (mm)40.000
Outside dia. D (in)1.5748
Width B (mm)12.000
Overall width T (mm)13.250
Overall width T (in)0.5217
Cup width C (mm)11.000

Load ratings & speeds

Basic dynamic load rating Cr (lbs)4800
Basic static load rating Cor (lbs)4460
Basic dynamic load rating Cr (N)21300
Basic static load rating C0r (N)19900
Dynamic rating C1 (N, ISO)21300
Dynamic rating C1 (lbf, ISO)4800
Radial rating C90 (N)5530
Radial rating C90 (lbf)1240
Thrust rating Ca90 (N)3270
Thrust rating Ca90 (lbf)735
Static rating C0 (N)19900
Static rating C0 (lbf)4460
Factor e0.35
Factor Y1.74
Factor K1.69
Geometry factor G14.2
Geometry factor G26.0
Geometry factor Cg0.0398
Effective load centre a (mm)-3.6

Weight

Weight (kg)0.08

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)1.0
Housing fillet r max (mm)1.0
Shaft shoulder da (mm)21.0
Shaft shoulder db (mm)22.0
Housing shoulder Da (mm)37.0
Housing shoulder Db (mm)35.0
Cage projection Aa (mm)0.1
Cage projection Ab (mm)1.6

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
45,3251023,386
63,55039213,083
82,6621,02434,133
102,1302,15471,814
151,4208,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 21,300 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.396 (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
1203-TVHFAGBall1740128.1 kN0.073
6203FAGBall1740129.5 kN0.065
6203-2RSRFAGBall1740129.5 kN0.067
6203-2ZFAGBall1740129.5 kN0.067
6203-CFAGBall17401210.4 kN0.062
6203-C-2BRSFAGBall17401210.4 kN0.065
6203-C-2HRSFAGBall17401210.4 kN0.067
6203-C-2ZFAGBall17401210.4 kN0.067
S6203FAGBall1740129.5 kN0.065
S6203-2RSRFAGBall1740129.5 kN0.067

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
03066X/03157XTimkenTapered Roller174014.68-0.09
30303TimkenTapered Roller17471432.7 kN0.14
X30203/Y30203TimkenTapered Roller174013.25--
X30303/Y30303TimkenTapered Roller174715.25--
05066/05175TimkenTapered Roller16.9944.4514.38--
05066/05185TimkenTapered Roller16.994714.3826.7 kN0.14
05066/05185DTimkenTapered Roller16.994731.7546.5 kN0.29
A6067/A6157TimkenTapered Roller16.9939.9911.1513.4 kN0.08

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