SIFT BEARING STORE CATALOG

303/28FAGTapered Roller

303/28 is a FAG tapered roller bearing, bore 28 mm, O.D. 68 mm, width 18 mm, dynamic rating 53 kN. Dimensions, drawing, interchanges and price.

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Bore d28mm
Outside dia. D68mm
Width B18mm
Dynamic Cr53kN
Static C0r51kN
Limiting speed11,700rpm
Weight0.342kg
Cr / C0r1.04
Mean dia. dm48mm

Original catalogue drawing - FAG Schaeffler HR 1, page 588

303/28 FAG 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. D68 mmBore d28 mmWidth B18 mmCup width C16 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 diameter281.1024
DOutside diameter682.6772
BInner-ring / bearing width180.7087
TOverall assembly width19.750.7776
CCup / outer-ring width160.6299

Notes

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)28
Outside dia. D (mm)68
Width B (mm)18
Overall width T (mm)19.75
Cup width C (mm)16
Inner-ring OD d1 (mm)46.5

Load ratings & speeds

Basic dynamic load rating Cr (lbs)11915
Basic static load rating Cor (lbs)11465
Basic dynamic load rating Cr (N)53000
Basic static load rating C0r (N)51000
Basic dynamic axial rating Ca (N)3
Fatigue limit load Cur (N)5800
Factor e0.3
Factor Y2
Factor Y01.1
Limiting speed nG (rpm)11,700
Reference speed nB (rpm)7,600
Effective load centre a (mm)14

Weight

Weight (kg)0.342

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)1.5
Shaft shoulder da (mm)38
Shaft shoulder db (mm)35
Housing shoulder Da (mm)59
Housing shoulder Db (mm)62
Housing fillet ra max (mm)1.5
Fillet rb max (mm)1.5

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
413,250102564
68,8333922,181
86,6251,0245,689
105,3002,15411,969
153,5338,32346,241

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 53,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandFAG
Source catalogueFAG / Schaeffler Rolling Bearings HR 1
Catalogue pagep.588 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
63/28NSKBall28681829.4 kN0.287
HR303/28NSKTapered Roller28681812,400 lbs0.34
HR303/28CNSKTapered Roller28681811,100 lbs0.336

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
303/22FAGTapered Roller22561638 kN0.21
303/32FAGTapered Roller32752067 kN0.464

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
320/28-XFAGTapered Roller28521633.5 kN0.156
322/28-BFAGTapered Roller28581943.5 kN0.257
329/28FAGTapered Roller28451215.8 kN0.073
332/28FAGTapered Roller28582457 kN0.306
T2ED028FAGTapered Roller28652771 kN0.451
T4CB028FAGTapered Roller285514.530 kN0.151
K1985-1922FAGTapered Roller28.5757.1519.3648 kN0.233
K1988-1922FAGTapered Roller28.5757.1519.3648 kN0.267

Request a quotation for 303/28

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