SIFT BEARING STORE CATALOG

HM903248/HM903210TimkenTapered Roller

HM903248/HM903210 is a Timken tapered roller bearing, bore 44.99 mm, O.D. 95.25 mm, width 28.57 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d44.99mm
Outside dia. D95.25mm
Width B28.57mm
Dynamic Cr115kN
Static C0r132kN
Weight0.98kg
Cr / C0r0.87
Mean dia. dm70.1mm

Original catalogue drawing - Timken TRB Catalog, page 180

HM903248/HM903210 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. D95.25 mmBore d44.99 mmWidth B28.57 mmCup width C22.23 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 diameter44.9871.7711
DOutside diameter95.253.75
BInner-ring / bearing width28.5751.125
TOverall assembly width30.9581.2188
CCup / outer-ring width22.2250.875
rChamfer (min)0.80.0315

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)44.987
Bore d (in)1.7712
Outside dia. D (mm)95.250
Outside dia. D (in)3.7500
Width B (mm)28.575
Overall width T (mm)30.958
Overall width T (in)1.2188
Cup width C (mm)22.225

Load ratings & speeds

Basic dynamic load rating Cr (lbs)25900
Basic static load rating Cor (lbs)29700
Basic dynamic load rating Cr (N)115000
Basic static load rating C0r (N)132000
Dynamic rating C1 (N, ISO)115000
Dynamic rating C1 (lbf, ISO)25900
Radial rating C90 (N)29800
Radial rating C90 (lbf)6710
Thrust rating Ca90 (N)37800
Thrust rating Ca90 (lbf)8490
Static rating C0 (N)132000
Static rating C0 (lbf)29700
Factor e0.74
Factor Y0.81
Factor K0.79
Geometry factor G133.7
Geometry factor G212.4
Geometry factor Cg0.1010
Effective load centre a (mm)0.5

Weight

Weight (kg)0.98
Cone weight (kg)0.62
Cup weight (kg)0.38
Total weight (kg)1.0

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)0.8
Shaft shoulder da (mm)54.0
Shaft shoulder db (mm)66.0
Housing shoulder Da (mm)91.0
Housing shoulder Db (mm)81.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
428,7501023,386
619,16739213,083
814,3751,02434,133
1011,5002,15471,814
157,6678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 115,000 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.180 (dimensions) / p.220 (cone) / p.219 (cup)
Series typeTS

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

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
25584A/25518TimkenTapered Roller44.9981.9725.490.5 kN0.53
25584A/25520TimkenTapered Roller44.9982.9325.490.5 kN0.55
HM905843/HM905810TimkenTapered Roller44.99104.9969.34234 kN2.81
367X/362TimkenTapered Roller44.999022.23-0.59
396A/393TimkenTapered Roller44.9911027--
V527A/520XTimkenTapered Roller44.9910039.69-1.37
25584/25518TimkenTapered Roller44.9881.9725.4-0.53
25584/25520TimkenTapered Roller44.9882.9325.490.5 kN0.56

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