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KOYO / Four-row tapered roller bearings

KOYO EE843221D/290/291D

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

Technical data available
Bore diameterd
558.8 mm
Outside diameterD
736.6 mm
WidthB
322.263 mm
Dynamic load ratingC
6370 kN
Static load ratingC0
16100 kN
Mass≈m
371 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 diameterd558.8 mm
Outside diameterD736.6 mm
WidthB322.263 mm
Basic dynamic load ratingC6370 kN
Basic static load ratingC016100 kN
Fatigue load limitPu1430 kN
Mass≈m371 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
d558.800 mm
D736.600 mm
T322.263 mm
W322.263 mm
R(Min.)6.4 mm
R1(Min.)3.2 mm
Basic Load Ratings : Cr6370 kN
Basic Load Ratings : C0R16100 kN
Fatigue Load Limit : Cu1430 kN
Axial Load Factors : Y21.97 mm
Axial Load Factors : Y32.93
Axial Load Factors : Y01.93
Constant E0.34
Da(Min.)607 mm
Da(Max.)692 mm
S(Min.)9.5 mm
Ra(Max.)6.4 mm
Rb(Max.)3.2 mm
Mass(Refer.)371 kg

Technical documents & data sheet

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Record identity
KOYO EE843221D/290/291D
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