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KOYO / Single-row

KOYO 6311NR

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

Technical data available
Bore diameterd
55 mm
Outside diameterD
120 mm
WidthB
29 mm
Dynamic load ratingC
89.5 kN
Static load ratingC0
45 kN
Limiting speednG
5600 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
Bore diameterd55 mm
Outside diameterD120 mm
WidthB29 mm
Basic dynamic load ratingC89.5 kN
Basic static load ratingC045 kN
Fatigue load limitPu3.45 kN
Limiting speednG5600 r/min
Mass≈m1.37 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key010-010-030
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathDeep groove ball bearings - Single-row
Official Classification 1Deep groove ball bearings / Single-row
Technical Data20 parameters
Technical Data
ParameterSymbolValue
d55 mm
D120 mm
B29 mm
R(Min.)2 mm
R1(Min.)0.5 mm
Basic Load Ratings : Cr89.5 kN
Basic Load Ratings : C0R45.0 kN
Fatigue Load Limit : Cu3.45 kN
Factor : F013.2
Limiting Speeds(Grease Lub.)5600 min-1
Limiting Speeds(Oil Lub.)6700 min-1
Dimensions Of Locating Snap Ring : D2(Min.)129.7 mm
Dimensions Of Locating Snap Ring : F(±0.05)2.77 mm
Da(Min.)64 mm
Da(Max.)111 mm
Dx(Min.)131.5 mm
Cy(Max.)6.58 mm
Ra(Max.)2 mm
Rb(Max.)0.5 mm
Mass(Refer.)1.37 kg

Technical documents & data sheet

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Record identity
KOYO 6311NR
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