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KOYO / Double-row

KOYO 4304

Deep groove ball bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
20 mm
Outside diameterD
52 mm
WidthB
21 mm
Dynamic load ratingC
24.3 kN
Static load ratingC0
17 kN
Limiting speednG
8300 r/min

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 specifications9 parameters
Core specifications
ParameterSymbolValue
Variant / constructionDouble-row
Bore diameterd20 mm
Outside diameterD52 mm
WidthB21 mm
Basic dynamic load ratingC24.3 kN
Basic static load ratingC017 kN
Fatigue load limitPu1.25 kN
Limiting speednG8300 r/min
Mass≈m0.227 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key010-040-000
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathDeep groove ball bearings - Double-row
Official Classification 1Deep groove ball bearings / Double-row
Technical Data13 parameters
Technical Data
ParameterSymbolValue
d20 mm
D52 mm
B21 mm
R(Min.)1.1 mm
Basic Load Ratings : Cr24.3 kN
Basic Load Ratings : C0R17.0 kN
Fatigue Load Limit : Cu1.25 kN
Factor : F013.5
Limiting Speeds(Grease Lub.)8300 min-1
Limiting Speeds(Oil Lub.)11000 min-1
Da(Max.)45.5 mm
Ra(Max.)1 mm
Mass(Refer.)0.227 kg

Technical documents & data sheet

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Record identity
KOYO 4304
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