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KOYO / Single-row / nnu / tapered type

KOYO NNU4938K

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

Technical data available
Bore diameterd
190 mm
Outside diameterD
260 mm
WidthB
69 mm
Dynamic load ratingC
581 kN
Static load ratingC0
996 kN
Limiting speednG
2000 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 / NNU / Tapered type
Bore diameterd190 mm
Outside diameterD260 mm
WidthB69 mm
Basic dynamic load ratingC581 kN
Basic static load ratingC0996 kN
Fatigue load limitPu119 kN
Limiting speednG2000 r/min
Mass≈m10.5 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key040-020-020
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathCylindrical roller bearings - Single-row - NNU - Tapered type
Official Classification 1Cylindrical roller bearings / Single-row / NNU / Tapered type
Technical Data17 parameters
Technical Data
ParameterSymbolValue
d190 mm
D260 mm
B69 mm
R(Min.)2 mm
Fw210 mm
Ew- mm
Basic Load Ratings : Cr581 kN
Basic Load Ratings : C0R996 kN
Fatigue Load Limit : Cu119 kN
Limiting Speeds(Grease Lub.)2000 min-1
Limiting Speeds(Oil Lub.)2400 min-1
Da(Min.)- mm
Da(Max.)207 mm
Db(Min.)215 mm
Da(Max.)251 mm
Ra(Max.)2 mm
Mass(Refer.)10.5 kg

Technical documents & data sheet

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Record identity
KOYO NNU4938K
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