SIFT BEARING STORE CATALOG

LM78349A/LM78310ATimkenTapered Roller

LM78349A/LM78310A is a Timken tapered roller bearing, bore 34.99 mm, O.D. 61.97 mm, width 17 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d34.99mm
Outside dia. D61.97mm
Width B17mm
Dynamic Cr50.4kN
Static C0r52.4kN
Weight0.2kg
Cr / C0r0.96
Mean dia. dm48.5mm

Original catalogue drawing - Timken TRB Catalog, page 136

LM78349A/LM78310A 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. D61.97 mmBore d34.99 mmWidth B17 mmCup width C13.6 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 diameter34.9871.3774
DOutside diameter61.9732.4399
BInner-ring / bearing width170.6693
TOverall assembly width16.7010.6575
CCup / outer-ring width13.60.5354
rChamfer (min)1.50.0591

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)34.987
Bore d (in)1.3775
Outside dia. D (mm)61.973
Outside dia. D (in)2.4399
Width B (mm)17.000
Overall width T (mm)16.701
Overall width T (in)0.6575
Cup width C (mm)13.600

Load ratings & speeds

Basic dynamic load rating Cr (lbs)11300
Basic static load rating Cor (lbs)11800
Basic dynamic load rating Cr (N)50400
Basic static load rating C0r (N)52400
Dynamic rating C1 (N, ISO)50400
Dynamic rating C1 (lbf, ISO)11300
Radial rating C90 (N)13100
Radial rating C90 (lbf)2940
Thrust rating Ca90 (N)9940
Thrust rating Ca90 (lbf)2230
Static rating C0 (N)52400
Static rating C0 (lbf)11800
Factor e0.44
Factor Y1.35
Factor K1.31
Geometry factor G116.1
Geometry factor G215.9
Geometry factor Cg0.0678
Effective load centre a (mm)-2.5

Weight

Weight (kg)0.2
Cone weight (kg)0.13
Cup weight (kg)0.07
Total weight (kg)0.2

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)1.5
Housing fillet r max (mm)1.5
Shaft shoulder da (mm)39.5
Shaft shoulder db (mm)42.0
Housing shoulder Da (mm)59.0
Housing shoulder Db (mm)54.0
Cage projection Aa (mm)0.7
Cage projection Ab (mm)1.2

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
412,6001023,386
68,40039213,083
86,3001,02434,133
105,0402,15471,814
153,3608,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 50,400 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.136 (dimensions) / p.110 (cone) / p.110 (cup)
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
KLM78349-A-LM78310-CFAGTapered Roller34.9961.971738 kN0.215
KLM78349-LM78310-AFAGTapered Roller34.9961.971738 kN0.2

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
LM78349/LM78310ATimkenTapered Roller34.9961.971742.5 kN0.19
LM78349/LM78310CTimkenTapered Roller34.9961.971742.5 kN0.2
LM78349A/LM78310CTimkenTapered Roller34.9961.971750.4 kN0.21

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
LM78349A/LM78310CTimkenTapered Roller34.9961.971750.4 kN0.21

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
L68149/L68110TimkenTapered Roller34.9959.1316.7645.5 kN0.17
L68149/L68111TimkenTapered Roller34.9959.9816.7645.5 kN0.17
LM78349/LM78310ATimkenTapered Roller34.9961.971742.5 kN0.19
LM78349/LM78310CTimkenTapered Roller34.9961.971742.5 kN0.2
M38547/M38511TimkenTapered Roller34.9965.9920.6462.4 kN0.3
L68149A/L68110TimkenTapered Roller34.9959.1316.76-0.18
M38547/M38510TimkenTapered Roller34.9966.6720.64-0.33
14139/14272TimkenTapered Roller34.9869.0119.58-0.3

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