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KOYO / Four-row tapered roller bearings

KOYO EE641198D/265/266D

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

Technical data available
Bore diameterd
501.65 mm
Outside diameterD
673.1 mm
WidthB
387.35 mm
Dynamic load ratingC
7150 kN
Static load ratingC0
17300 kN
Mass≈m
386 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 diameterd501.65 mm
Outside diameterD673.1 mm
WidthB387.35 mm
Basic dynamic load ratingC7150 kN
Basic static load ratingC017300 kN
Fatigue load limitPu1550 kN
Mass≈m386 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
d501.650 mm
D673.100 mm
T387.350 mm
W400.050 mm
R(Min.)6.4 mm
R1(Min.)3.2 mm
Basic Load Ratings : Cr7150 kN
Basic Load Ratings : C0R17300 kN
Fatigue Load Limit : Cu1550 kN
Axial Load Factors : Y22.15 mm
Axial Load Factors : Y33.20
Axial Load Factors : Y02.10
Constant E0.31
Da(Min.)538 mm
Da(Max.)628 mm
S(Min.)9.5 mm
Ra(Max.)6.4 mm
Rb(Max.)3.2 mm
Mass(Refer.)386 kg

Technical documents & data sheet

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Record identity
KOYO EE641198D/265/266D
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