SIFT BEARING STORE CATALOG

LL771948/LL771911TimkenTapered Roller

LL771948/LL771911 is a Timken tapered roller bearing, bore 476.25 mm, O.D. 565.15 mm, width 41.27 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d476.25mm
Outside dia. D565.15mm
Width B41.27mm
Dynamic Cr469kN
Static C0r1400kN
Weight18.78kg
Cr / C0r0.34
Mean dia. dm520.7mm

Original catalogue drawing - Timken TRB Catalog, page 380

LL771948/LL771911 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. D565.15 mmBore d476.25 mmWidth B41.27 mmCup width C31.75 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 diameter476.2518.75
DOutside diameter565.1522.25
BInner-ring / bearing width41.2751.625
TOverall assembly width41.2751.625
CCup / outer-ring width31.751.25
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)476.250
Bore d (in)18.7500
Outside dia. D (mm)565.150
Outside dia. D (in)22.2500
Width B (mm)41.275
Overall width T (mm)41.275
Overall width T (in)1.6250
Cup width C (mm)31.750

Load ratings & speeds

Basic dynamic load rating Cr (lbs)106000
Basic static load rating Cor (lbs)315000
Basic dynamic load rating Cr (N)469000
Basic static load rating C0r (N)1400000
Dynamic rating C1 (N, ISO)469000
Dynamic rating C1 (lbf, ISO)106000
Radial rating C90 (N)122000
Radial rating C90 (lbf)27400
Thrust rating Ca90 (N)97800
Thrust rating Ca90 (lbf)22000
Static rating C0 (N)1400000
Static rating C0 (lbf)315000
Factor e0.47
Factor Y1.28
Factor K1.24
Geometry factor G13792.4
Geometry factor G21237.1
Geometry factor Cg0.2189
Effective load centre a (mm)58.4

Weight

Weight (kg)18.78
Cone weight (kg)13.04
Cup weight (kg)6.24
Total weight (kg)19.28

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.3
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)491.0
Shaft shoulder db (mm)495.0
Housing shoulder Da (mm)549.0
Housing shoulder Db (mm)543.0
Cage projection Aa (mm)3.5
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
4117,2501023,386
678,16739213,083
858,6251,02434,133
1046,9002,15471,814
1531,2678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 469,000 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.380 (dimensions) / p.211 (cone) / p.211 (cup)
Series typeTS

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
LL771948/LL771911CDTimkenTapered Roller476.25565.1595.25817 kN42.52

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
M272749/M272710TimkenTapered Roller479.43679.45128.593730 kN149.07
M272749/M272710CDTimkenTapered Roller479.43679.45276.236500 kN309.29
M272749/M272710DTimkenTapered Roller479.43679.45276.236500 kN309.29
M272749D/M272710TimkenTapered Roller479.43679.45238.126500 kN286.5
M272749TD/M272710TimkenTapered Roller479.43679.45238.126500 kN303.33
80480/80418TimkenTapered Roller482.6596.93.3-28.98
80480/80425TimkenTapered Roller482.6615.9546.04656 kN34.6
EE243190/243250TimkenTapered Roller482.6634.8780.961470 kN66.2

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