SIFT BEARING STORE CATALOG

28980/28921TimkenTapered Roller

28980/28921 is a Timken tapered roller bearing, bore 59.98 mm, O.D. 100 mm, width 25.4 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
Request a quoteEmail usSearch the catalog
Bore d59.98mm
Outside dia. D100mm
Width B25.4mm
Dynamic Cr106kN
Static C0r149kN
Weight0.75kg
Cr / C0r0.71
Mean dia. dm80mm

Original catalogue drawing - Timken TRB Catalog, page 226

28980/28921 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. D100 mmBore d59.98 mmWidth B25.4 mmCup width C19.84 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 diameter59.9772.3613
DOutside diameter1003.937
BInner-ring / bearing width25.41
TOverall assembly width25.41
CCup / outer-ring width19.8450.7813
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)59.977
Bore d (in)2.3613
Outside dia. D (mm)100.000
Outside dia. D (in)3.9370
Width B (mm)25.400
Overall width T (mm)25.400
Overall width T (in)1.0000
Cup width C (mm)19.845

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)-2.5

Weight

Weight (kg)0.75

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)67.0
Shaft shoulder db (mm)73.0
Housing shoulder Da (mm)96.0
Housing shoulder Db (mm)89.0
Cage projection Aa (mm)2.0
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.226 (dimensions)
Series typeTS

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

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
28980/28919TimkenTapered Roller59.9899.9825.4-0.76

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
28980/28919TimkenTapered Roller59.9899.9825.4-0.76
28980/28921DTimkenTapered Roller59.9810055.56185 kN1.67

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
66586/66520TimkenTapered Roller59.98122.2431.75155 kN1.63
66589/66520TimkenTapered Roller59.97122.2431.75-1.65
66589/66522DTimkenTapered Roller59.97129.9869.85319 kN3.94
39236/39412TimkenTapered Roller59.99104.7822115 kN0.74
39236/39433TimkenTapered Roller59.99110.0622115 kN0.86
3977X/3919RBTimkenTapered Roller59.99112.7128-1.26
3977X/3920TimkenTapered Roller59.99112.7128139 kN1.29
3977X/3921XATimkenTapered Roller59.99109.9828139 kN1.2

Request a quotation for 28980/28921

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.