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KOYO / Four-row tapered roller bearings

KOYO LM278849D/810/810D

Rolling mill roll neck bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
585.788 mm
Outside diameterD
771.525 mm
WidthB
479.425 mm
Dynamic load ratingC
9790 kN
Static load ratingC0
25600 kN
Mass≈m
599 kg

Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications8 parameters
Core specifications
ParameterSymbolValue
Variant / constructionFour-row tapered roller bearings
Bore diameterd585.788 mm
Outside diameterD771.525 mm
WidthB479.425 mm
Basic dynamic load ratingC9790 kN
Basic static load ratingC025600 kN
Fatigue load limitPu2120 kN
Mass≈m599 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key140-020-000
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathRolling mill roll neck bearings - Four-row tapered roller bearings
Official Classification 1Rolling mill roll neck bearings / Four-row tapered roller bearings
Technical Data19 parameters
Technical Data
ParameterSymbolValue
d585.788 mm
D771.525 mm
T479.425 mm
W479.425 mm
R(Min.)6.4 mm
R1(Min.)3.2 mm
Basic Load Ratings : Cr9790 kN
Basic Load Ratings : C0R25600 kN
Fatigue Load Limit : Cu2120 kN
Axial Load Factors : Y22.03 mm
Axial Load Factors : Y33.02
Axial Load Factors : Y01.98
Constant E0.33
Da(Min.)622 mm
Da(Max.)725 mm
S(Min.)11 mm
Ra(Max.)6.4 mm
Rb(Max.)3.2 mm
Mass(Refer.)599 kg

Technical documents & data sheet

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Record identity
KOYO LM278849D/810/810D
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