SIFT BEARING STORE CATALOG

NP266377/NP543910TimkenTapered Roller

NP266377/NP543910 is a Timken tapered roller bearing, bore 536.58 mm, O.D. 780 mm, width 150 mm. Dimensions, drawing, interchanges and price.

High precision classCone + cup assembly
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Bore d536.58mm
Outside dia. D780mm
Width B150mm
Dynamic Cr4010kN
Static C0r9250kN
Weight234.26kg
Cr / C0r0.43
Mean dia. dm658.3mm

Original catalogue drawing - Timken TRB Catalog, page 382

NP266377/NP543910 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. D780 mmBore d536.58 mmWidth B150 mmCup width C114.3 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 diameter536.57521.125
DOutside diameter78030.7087
BInner-ring / bearing width1505.9055
TOverall assembly width1505.9055
CCup / outer-ring width114.34.5
rChamfer (min)6.40.252

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)536.575
Bore d (in)21.1250
Outside dia. D (mm)780.000
Outside dia. D (in)30.7087
Width B (mm)150.000
Overall width T (mm)150.000
Overall width T (in)5.9055
Cup width C (mm)114.300

Load ratings & speeds

Basic dynamic load rating Cr (lbs)902000
Basic static load rating Cor (lbs)2080000
Basic dynamic load rating Cr (N)4010000
Basic static load rating C0r (N)9250000
Dynamic rating C1 (N, ISO)4010000
Dynamic rating C1 (lbf, ISO)902000
Radial rating C90 (N)1040000
Radial rating C90 (lbf)234000
Thrust rating Ca90 (N)592000
Thrust rating Ca90 (lbf)133000
Static rating C0 (N)9250000
Static rating C0 (lbf)2080000
Factor e0.33
Factor Y1.80
Factor K1.76
Geometry factor G110625.0
Geometry factor G2614.5
Geometry factor Cg0.2839
Effective load centre a (mm)-13.7

Weight

Weight (kg)234.26

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)6.4
Housing fillet r max (mm)6.4
Shaft shoulder da (mm)570.0
Shaft shoulder db (mm)576.0
Housing shoulder Da (mm)726.0
Housing shoulder Db (mm)720.0
Cage projection Aa (mm)18.4
Cage projection Ab (mm)4.5

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
41,002,5001023,386
6668,33339213,083
8501,2501,02434,133
10401,0002,15471,814
15267,3338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 4,010,000 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.382 (dimensions)
Series typeTS

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

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
M276449/M276410TimkenTapered Roller536.58761.87146.054010 kN211
M276449/M276410CDTimkenTapered Roller536.58761.87311.156980 kN435.41
M276449D/M276410TimkenTapered Roller536.58761.87269.886980 kN415.94
LL475048/LL475010DTimkenTapered Roller534.99622.3101.61160 kN44.63
LL475048/LL475011DTimkenTapered Roller534.99622.3111.121160 kN47.73
EE522126D/523087TimkenTapered Roller539.75784.23161.933770 kN240.64
LL575349/LL575310TimkenTapered Roller539.7563550.8892 kN25.1
EE522102/523087TimkenTapered Roller533.4784.2382.552170 kN125.58

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