SIFT BEARING STORE CATALOG

M249748D/M249710TimkenTapered Roller

M249748D/M249710 is a Timken tapered roller bearing, bore 254 mm, O.D. 358.77 mm, width 130.18 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d254mm
Outside dia. D358.77mm
Width B130.18mm
Dynamic Cr1590kN
Weight42.34kg
Mean dia. dm306.4mm

Original catalogue drawing - Timken TRB Catalog, page 620

M249748D/M249710 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. D358.77 mmBore d254 mmWidth B130.18 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 diameter25410
DOutside diameter358.77514.125
BInner-ring / bearing width130.1755.125
TOverall assembly width130.1755.125
rChamfer (min)3.30.1299

Notes

Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. 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)254.000
Bore d (in)10.0000
Outside dia. D (mm)358.775
Outside dia. D (in)14.1250
Width B (mm)130.175
Width B (in)5.1250
Overall width T (mm)130.175
Overall width T (in)5.1250

Load ratings & speeds

Basic dynamic load rating Cr (lbs)358000
Basic dynamic load rating Cr (N)1590000
Dynamic rating C1 (N, ISO)1590000
Dynamic rating C1 (lbf, ISO)358000
Radial rating C90 (N)237000
Radial rating C90 (lbf)53300
Thrust rating Ca90 (N)135000
Thrust rating Ca90 (lbf)30300
Factor e0.3
Factor Y12.0
Factor Y23.0
Factor K1.76
Geometry factor G11626.0
Geometry factor G2173.0
Geometry factor Cg0.1526

Weight

Weight (kg)42.34

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.3
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)272.5
Housing shoulder Db (mm)335.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4397,5001023,386
6265,00039213,083
8198,7501,02434,133
10159,0002,15471,814
15106,0008,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,590,000 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.620 (dimensions)
Series typeTDI

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
M249748D/JM249712TimkenTapered Roller254360130.181590 kN44.36

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
29875/29820TimkenTapered Roller254323.8522.23151 kN4.27
29875/29820DTimkenTapered Roller254323.8563.5263 kN11.05
EE134100/134143TimkenTapered Roller254365.1258.74679 kN18.23
EE134100/134144CDTimkenTapered Roller254365.12130.181180 kN39.21
EE134100/134145TimkenTapered Roller254368.358.74679 kN18.85
EE171000D/171400TimkenTapered Roller254355.692.86976 kN27.99
EE171000D/171436TimkenTapered Roller254365.0592.86976 kN30.85
EE171000D/171450TimkenTapered Roller254368.392.86976 kN32.05

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