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KOYO / Single-row / metric series

KOYO 320/28JR

Tapered roller bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
28 mm
Outside diameterD
52 mm
WidthB
16 mm
Dynamic load ratingC
44.1 kN
Static load ratingC0
44 kN
Limiting speednG
7500 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 / constructionSingle-row / Metric series
Bore diameterd28 mm
Outside diameterD52 mm
WidthB16 mm
Basic dynamic load ratingC44.1 kN
Basic static load ratingC044 kN
Fatigue load limitPu6.1 kN
Limiting speednG7500 r/min
Mass≈m0.15 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key050-010-010
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathTapered roller bearings - Single-row - Metric series
Official Classification 1Tapered roller bearings / Single-row / Metric series
Technical Data25 parameters
Technical Data
ParameterSymbolValue
d28 mm
D52 mm
T16 mm
B16 mm
C12 mm
R(Min.)1 mm
R1(Min.)1 mm
Basic Load Ratings : Cr44.1 kN
Basic Load Ratings : C0R44.0 kN
Fatigue Load Limit : Cu6.10 kN
Limiting Speeds(Grease Lub.)7500 min-1
Limiting Speeds(Oil Lub.)10000 min-1
Load Center Spread : A12.7 mm
Constant E0.43
Axial Load Factors : Y11.39
Axial Load Factors : Y00.77
Da(Min.)45 mm
Db(Max.)33 mm
Da(Max.)46.5 mm
Db(Min.)49 mm
Sa(Min.)3 mm
Sb(Min.)4 mm
Ra(Max.)1 mm
Rb(Max.)1 mm
Mass(Refer.)0.150 kg

Technical documents & data sheet

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Record identity
KOYO 320/28JR
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