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KOYO / Four-row tapered roller bearings

KOYO 48680D/20/20D

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

Technical data available
Bore diameterd
139.7 mm
Outside diameterD
200.025 mm
WidthB
160.34 mm
Dynamic load ratingC
903 kN
Static load ratingC0
1960 kN
Mass≈m
16.6 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 diameterd139.7 mm
Outside diameterD200.025 mm
WidthB160.34 mm
Basic dynamic load ratingC903 kN
Basic static load ratingC01960 kN
Fatigue load limitPu266 kN
Mass≈m16.6 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
d139.700 mm
D200.025 mm
T160.340 mm
W157.166 mm
R(Min.)3.3 mm
R1(Min.)0.8 mm
Basic Load Ratings : Cr903 kN
Basic Load Ratings : C0R1960 kN
Fatigue Load Limit : Cu266 kN
Axial Load Factors : Y22.01 mm
Axial Load Factors : Y32.99
Axial Load Factors : Y01.96
Constant E0.34
Da(Min.)157 mm
Da(Max.)182 mm
S(Min.)4 mm
Ra(Max.)3.3 mm
Rb(Max.)0.8 mm
Mass(Refer.)16.6 kg

Technical documents & data sheet

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Record identity
KOYO 48680D/20/20D
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