SIFT BEARING STORE CATALOG

31311-A-N11CA-A80-120FAGTapered Roller

31311-A-N11CA-A80-120 is a FAG tapered roller bearing, bore 55 mm, O.D. 120 mm, dynamic rating 209 kN. Dimensions, drawing, interchanges and price.

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Bore d55mm
Outside dia. D120mm
Dynamic Cr209kN
Static C0r275kN
Weight3.4kg
Cr / C0r0.76
Mean dia. dm87.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 492

31311-A-N11CA-A80-120 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. D120 mmBore d55 mmWidth B32.5 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 diameter552.1654
DOutside diameter1204.7244

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)55
Outside dia. D (mm)120

Load ratings & speeds

Basic dynamic load rating Cr (lbs)46985
Basic static load rating Cor (lbs)61822
Basic dynamic load rating Cr (N)209000
Basic static load rating C0r (N)275000
Basic dynamic axial rating Ca (N)4
Fatigue limit load Cur (N)32500
Factor e0.83
Factor Y00.8

Weight

Weight (kg)3.4

Mounting dimensions (fillets / shoulders)

Shaft shoulder da (mm)68
Housing shoulder Da (mm)110
Fillet rb max (mm)2

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
452,2501023,386
634,83339213,083
826,1251,02434,133
1020,9002,15471,814
1513,9338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 209,000 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.492 (dimensions)

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
31311-AFAGTapered Roller5512029122 kN1.57
31311-XLFAGTapered Roller5512029145 kN1.75

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
30211-AFAGTapered Roller551002191 kN0.92
30211-XLFAGTapered Roller5510021109 kN0.728
30311-AFAGTapered Roller5512029151 kN1.8
30311-XLFAGTapered Roller5512029180 kN1.63
32011-XFAGTapered Roller55902379 kN0.64
32011-X-XLFAGTapered Roller55902396 kN0.57
32211-AFAGTapered Roller5510025110 kN0.87
32211-B-XLFAGTapered Roller5510025124 kN0.88

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