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KOYO / Four-row tapered roller bearings

KOYO LM778549D/510/510D

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

Technical data available
Bore diameterd
584.2 mm
Outside diameterD
762 mm
WidthB
401.638 mm
Dynamic load ratingC
7880 kN
Static load ratingC0
20800 kN
Mass≈m
468 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 diameterd584.2 mm
Outside diameterD762 mm
WidthB401.638 mm
Basic dynamic load ratingC7880 kN
Basic static load ratingC020800 kN
Fatigue load limitPu1770 kN
Mass≈m468 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
d584.200 mm
D762.000 mm
T401.638 mm
W396.875 mm
R(Min.)6.4 mm
R1(Min.)3.2 mm
Basic Load Ratings : Cr7880 kN
Basic Load Ratings : C0R20800 kN
Fatigue Load Limit : Cu1770 kN
Axial Load Factors : Y21.43 mm
Axial Load Factors : Y32.12
Axial Load Factors : Y01.40
Constant E0.47
Da(Min.)617 mm
Da(Max.)715 mm
S(Min.)8.5 mm
Ra(Max.)6.4 mm
Rb(Max.)3.2 mm
Mass(Refer.)468 kg

Technical documents & data sheet

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Record identity
KOYO LM778549D/510/510D
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