SIFT BEARING STORE CATALOG

NP934748/NP920752TimkenTapered Roller

NP934748/NP920752 is a Timken tapered roller bearing, bore 560 mm, O.D. 820 mm, height 268 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d560mm
Outside dia. D820mm
Overall width T268mm
Dynamic Cr5250kN
Weight412.68kg
Mean dia. dm690mm

Original catalogue drawing - Timken TRB Catalog, page 602

NP934748/NP920752 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. D820 mmBore d560 mmOverall width T268 mmCup width C190 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 diameter56022.0472
DOutside diameter82032.2835
TOverall assembly width26810.5512
CCup / outer-ring width1907.4803
rChamfer (min)3.50.1378

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)560.000
Bore d (in)22.0472
Outside dia. D (mm)820.000
Outside dia. D (in)32.2835
Overall width T (mm)268.000
Overall width T (in)10.5512
Cup width C (mm)190.000
Cup width C (in)7.4803

Load ratings & speeds

Basic dynamic load rating Cr (lbs)1180000
Basic dynamic load rating Cr (N)5250000
Dynamic rating C1 (N, ISO)5250000
Dynamic rating C1 (lbf, ISO)1180000
Radial rating C90 (N)781000
Radial rating C90 (lbf)176000
Thrust rating Ca90 (N)611000
Thrust rating Ca90 (lbf)137000
Factor e0.46
Factor Y11.48
Factor Y22.20
Factor K1.28
Geometry factor G16738.0
Geometry factor G2546.6
Geometry factor Cg0.2682

Weight

Weight (kg)412.68

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)10.0
Housing fillet r max (mm)3.5
Shaft shoulder db (mm)606.0
Housing shoulder Da (mm)783.0
Pin dimension Ka (mm)28.58
Pin dimension Kb (mm)17.37

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
41,312,5001023,386
6875,00039213,083
8656,2501,02434,133
10525,0002,15471,814
15350,0008,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 5,250,000 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.602 (dimensions)
Series typeTDO

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

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
NP378108/NP676901TimkenTapered Roller560108047018600 kN2182.15
NP915736/NP585761TimkenTapered Roller560820258.55250 kN406.98
EE327220/327355TimkenTapered Roller558.8901.57129.383790 kN311.89
EE327220/327357DTimkenTapered Roller558.8901.7292.16610 kN656.31
EE542220/542290TimkenTapered Roller558.8736.676.21400 kN77.61
EE542220/542291CDTimkenTapered Roller558.8736.6165.12440 kN165.28
EE647220/647285TimkenTapered Roller558.8723.973.031540 kN73.36
EE843220/843290TimkenTapered Roller558.8736.688.112070 kN94.77

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