SIFT BEARING STORE CATALOG

LM742749AA/LM742710TimkenTapered Roller

LM742749AA/LM742710 is a Timken tapered roller bearing, bore 215.9 mm, O.D. 285.75 mm, width 46.04 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d215.9mm
Outside dia. D285.75mm
Width B46.04mm
Dynamic Cr430kN
Static C0r892kN
Weight7.51kg
Cr / C0r0.48
Mean dia. dm250.8mm

Original catalogue drawing - Timken TRB Catalog, page 344

LM742749AA/LM742710 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. D285.75 mmBore d215.9 mmWidth B46.04 mmCup width C34.92 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 diameter215.98.5
DOutside diameter285.7511.25
BInner-ring / bearing width46.0381.8125
TOverall assembly width46.0381.8125
CCup / outer-ring width34.9251.375
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)215.900
Bore d (in)8.5000
Outside dia. D (mm)285.750
Outside dia. D (in)11.2500
Width B (mm)46.038
Overall width T (mm)46.038
Overall width T (in)1.8125
Cup width C (mm)34.925

Load ratings & speeds

Basic dynamic load rating Cr (lbs)96600
Basic static load rating Cor (lbs)200000
Basic dynamic load rating Cr (N)430000
Basic static load rating C0r (N)892000
Dynamic rating C1 (N, ISO)430000
Dynamic rating C1 (lbf, ISO)96600
Radial rating C90 (N)111000
Radial rating C90 (lbf)25000
Thrust rating Ca90 (N)91800
Thrust rating Ca90 (lbf)20600
Static rating C0 (N)892000
Static rating C0 (lbf)200000
Factor e0.48
Factor Y1.25
Factor K1.21
Geometry factor G1866.9
Geometry factor G2225.2
Geometry factor Cg0.1388
Effective load centre a (mm)14.2

Weight

Weight (kg)7.51

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)8.9
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)227.0
Shaft shoulder db (mm)242.0
Housing shoulder Da (mm)279.0
Housing shoulder Db (mm)266.0
Cage projection Aa (mm)5.1
Cage projection Ab (mm)2.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4107,5001023,386
671,66739213,083
853,7501,02434,133
1043,0002,15471,814
1528,6678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 430,000 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.344 (dimensions)
Series typeTS

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

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
KLM742749-LM742710FAGTapered Roller215.9285.7546.04360 kN7.86

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
LM742749/LM742710TimkenTapered Roller215.9285.7546.04430 kN7.59

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
543085/543114TimkenTapered Roller215.9290.0131.75239 kN5.42
543085/543115DTimkenTapered Roller215.9287.3469.85416 kN11.47
96851D/96140TimkenTapered Roller215.9355.6130.181320 kN51.05
EE130850D/131400TimkenTapered Roller215.9355.6120.651390 kN46.68
EE130851/131400TimkenTapered Roller215.9355.669.85796 kN25.3
EE130851/131401CDTimkenTapered Roller215.9355.6152.41390 kN53.77
EE420850/421417TimkenTapered Roller215.936079.371100 kN30.88
EE420850/421437TimkenTapered Roller215.9365.0579.371100 kN32.3

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