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KOYO / Drawn cup needle roller bearings / metric series, caged

KOYO BK4020

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

Technical data available
Outside diameterD
47 mm
Dynamic load ratingC
25.1 kN
Static load ratingC0
50.4 kN
Limiting speednG
5200 r/min
Mass≈m
0.07 kg
Fw
40 mm

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 specifications7 parameters
Core specifications
ParameterSymbolValue
Variant / constructionDrawn cup needle roller bearings / Metric series, caged
Outside diameterD47 mm
Basic dynamic load ratingC25.1 kN
Basic static load ratingC050.4 kN
Fatigue load limitPu8 kN
Limiting speednG5200 r/min
Mass≈m0.07 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key090-020-010
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathNeedle roller bearings - Drawn cup needle roller bearings - Metric series, caged
Official Classification 1Needle roller bearings / Drawn cup needle roller bearings / Metric series, caged
Technical Data12 parameters
Technical Data
ParameterSymbolValue
Fw40 mm
D47 mm
C20 mm
C3(Min.)17.3 mm
R(Min.)1 mm
Basic Load Ratings : Cr25.1 kN
Basic Load Ratings : C0R50.4 kN
Fatigue Load Limit : Cu8.00 kN
Limiting Speeds(Grease Lub.)5200 min-1
Limiting Speeds(Oil Lub.)7900 min-1
Mounting Inner RingJR35x40x20,5
Mass(Refer.)0.070 kg

Technical documents & data sheet

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Record identity
KOYO BK4020
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