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KOYO / Single-row / metric series

KOYO 31326JR

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

Technical data available
Bore diameterd
130 mm
Outside diameterD
280 mm
WidthB
66 mm
Dynamic load ratingC
734 kN
Static load ratingC0
748 kN
Limiting speednG
1200 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 diameterd130 mm
Outside diameterD280 mm
WidthB66 mm
Basic dynamic load ratingC734 kN
Basic static load ratingC0748 kN
Fatigue load limitPu85.7 kN
Limiting speednG1200 r/min
Mass≈m18.9 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
d130 mm
D280 mm
T72 mm
B66 mm
C44 mm
R(Min.)5 mm
R1(Min.)4 mm
Basic Load Ratings : Cr734 kN
Basic Load Ratings : C0R748 kN
Fatigue Load Limit : Cu85.7 kN
Limiting Speeds(Grease Lub.)1200 min-1
Limiting Speeds(Oil Lub.)1600 min-1
Load Center Spread : A87.3 mm
Constant E0.83
Axial Load Factors : Y10.73
Axial Load Factors : Y00.40
Da(Min.)236 mm
Db(Max.)155 mm
Da(Max.)262 mm
Db(Min.)261 mm
Sa(Min.)7 mm
Sb(Min.)23 mm
Ra(Max.)4 mm
Rb(Max.)3 mm
Mass(Refer.)18.9 kg

Technical documents & data sheet

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Record identity
KOYO 31326JR
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