SIFT BEARING STORE CATALOG

28985/28921DTimkenTapered Roller

28985/28921D is a Timken tapered roller bearing, bore 60.33 mm, O.D. 100 mm, height 55.56 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
Request a quoteEmail usSearch the catalog
Bore d60.33mm
Outside dia. D100mm
Overall width T55.56mm
Dynamic Cr185kN
Weight1.64kg
Mean dia. dm80.2mm

Original catalogue drawing - Timken TRB Catalog, page 534

28985/28921D 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

DdTOutside dia. D100 mmBore d60.33 mmOverall width T55.56 mmCup width C44.45 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 diameter60.3252.375
DOutside diameter1003.937
TOverall assembly width55.562.1874
CCup / outer-ring width44.451.75
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)60.325
Bore d (in)2.3750
Outside dia. D (mm)100.000
Outside dia. D (in)3.9370
Overall width T (mm)55.560
Overall width T (in)2.1874
Cup width C (mm)44.450
Cup width C (in)1.7500

Load ratings & speeds

Basic dynamic load rating Cr (lbs)41500
Basic dynamic load rating Cr (N)185000
Dynamic rating C1 (N, ISO)185000
Dynamic rating C1 (lbf, ISO)41500
Radial rating C90 (N)27500
Radial rating C90 (lbf)6180
Thrust rating Ca90 (N)20000
Thrust rating Ca90 (lbf)4500
Factor e0.43
Factor Y11.59
Factor Y22.36
Factor K1.37
Geometry factor G160.1
Geometry factor G224.5
Geometry factor Cg0.1032

Weight

Weight (kg)1.64

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)0.8
Shaft shoulder db (mm)73.0
Housing shoulder Da (mm)96.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
446,2501023,386
630,83339213,083
823,1251,02434,133
1018,5002,15471,814
1512,3338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 185,000 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.534 (dimensions)
Series typeTDO

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
28985/28919TimkenTapered Roller60.3399.9825.4-0.75
28985/28920TimkenTapered Roller60.33101.625.4106 kN0.78
28985/28921TimkenTapered Roller60.3310025.4106 kN0.74
28985/28921ATimkenTapered Roller60.3310025.4106 kN0.76

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
3960/3919RBTimkenTapered Roller60.33112.7136.4-1.42
3980/3920TimkenTapered Roller60.33112.7130.05139 kN1.3
3980/3925TimkenTapered Roller60.33112.7130.05139 kN1.31
557A/552TimkenTapered Roller60.33123.8336.68-2.08
558/552TimkenTapered Roller60.33123.8336.68226 kN2.13
558/552ATimkenTapered Roller60.33123.8336.68226 kN2.08
558/552DTimkenTapered Roller60.33123.8379.38394 kN4.32
5582/5520TimkenTapered Roller60.33120.2543.76-2.32

Request a quotation for 28985/28921D

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.