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KOYO / Four-row tapered roller bearings

KOYO 8576D/20/20D

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

Technical data available
Bore diameterd
234.95 mm
Outside diameterD
327.025 mm
WidthB
196.85 mm
Dynamic load ratingC
1720 kN
Static load ratingC0
3720 kN
Mass≈m
50.1 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 diameterd234.95 mm
Outside diameterD327.025 mm
WidthB196.85 mm
Basic dynamic load ratingC1720 kN
Basic static load ratingC03720 kN
Fatigue load limitPu401 kN
Mass≈m50.1 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
d234.950 mm
D327.025 mm
T196.850 mm
W196.850 mm
R(Min.)3.2 mm
R1(Min.)1.6 mm
Basic Load Ratings : Cr1720 kN
Basic Load Ratings : C0R3720 kN
Fatigue Load Limit : Cu401 kN
Axial Load Factors : Y21.66 mm
Axial Load Factors : Y32.47
Axial Load Factors : Y01.62
Constant E0.41
Da(Min.)255 mm
Da(Max.)299 mm
S(Min.)5.5 mm
Ra(Max.)3.2 mm
Rb(Max.)1.6 mm
Mass(Refer.)50.1 kg

Technical documents & data sheet

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Record identity
KOYO 8576D/20/20D
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