SIFT BEARING STORE CATALOG

28990/28919TimkenTapered Roller

28990/28919 is a Timken tapered roller bearing, bore 61.98 mm, O.D. 99.98 mm, width 24.61 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d61.98mm
Outside dia. D99.98mm
Width B24.61mm
Dynamic Cr106kN
Static C0r149kN
Weight0.7kg
Cr / C0r0.71
Mean dia. dm81mm

Original catalogue drawing - Timken TRB Catalog, page 234

28990/28919 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. D99.98 mmBore d61.98 mmWidth B24.61 mmCup width C19.05 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 diameter61.9762.44
DOutside diameter99.9793.9362
BInner-ring / bearing width24.6080.9688
TOverall assembly width23.8120.9375
CCup / outer-ring width19.050.75
rChamfer (min)1.50.0591

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)61.976
Bore d (in)2.4400
Outside dia. D (mm)99.979
Outside dia. D (in)3.9362
Width B (mm)24.608
Overall width T (mm)23.812
Overall width T (in)0.9375
Cup width C (mm)19.050

Load ratings & speeds

Basic dynamic load rating Cr (lbs)23800
Basic static load rating Cor (lbs)33500
Basic dynamic load rating Cr (N)106000
Basic static load rating C0r (N)149000
Dynamic rating C1 (N, ISO)106000
Dynamic rating C1 (lbf, ISO)23800
Radial rating C90 (N)27500
Radial rating C90 (lbf)6180
Thrust rating Ca90 (N)20000
Thrust rating Ca90 (lbf)4500
Static rating C0 (N)149000
Static rating C0 (lbf)33500
Factor e0.43
Factor Y1.41
Factor K1.37
Geometry factor G160.1
Geometry factor G224.5
Geometry factor Cg0.1032
Effective load centre a (mm)-1.8

Weight

Weight (kg)0.7
Cone weight (kg)0.49
Cup weight (kg)0.22
Total weight (kg)0.71

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)2.0
Housing fillet r max (mm)1.5
Shaft shoulder da (mm)68.0
Shaft shoulder db (mm)72.0
Housing shoulder Da (mm)96.0
Housing shoulder Db (mm)90.0
Cage projection Aa (mm)1.2
Cage projection Ab (mm)1.4

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
426,5001023,386
617,66739213,083
813,2501,02434,133
1010,6002,15471,814
157,0678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 106,000 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.234 (dimensions) / p.82 (cone) / p.82 (cup)
Series typeTS

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

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
392/3920TimkenTapered Roller61.91112.712298.9 kN1.05
392/393TimkenTapered Roller61.9111022--
392/394ATimkenTapered Roller61.911102298.9 kN0.86
392/394DTimkenTapered Roller61.9111052.39172 kN1.96
554/552TimkenTapered Roller61.91123.8336.68-2.07
554/552ATimkenTapered Roller61.91123.8336.68191 kN2.02
554/552DTimkenTapered Roller61.91123.8379.38332 kN4.19
9178/9120TimkenTapered Roller61.91158.7552.39-4.96

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