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KOYO / Radial needle roller and cage assemblies / metric series / k,k.zw

KOYO K45X52X21F

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

Technical data available
Dynamic load ratingC
35 kN
Static load ratingC0
63.2 kN
Limiting speednG
6200 r/min
Mass≈m
0.055 kg
Fw
45 mm
Ew
52 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 specifications6 parameters
Core specifications
ParameterSymbolValue
Variant / constructionRadial needle roller and cage assemblies / Metric series / K,K.ZW
Basic dynamic load ratingC35 kN
Basic static load ratingC063.2 kN
Fatigue load limitPu9.9 kN
Limiting speednG6200 r/min
Mass≈m0.055 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key090-010-010
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathNeedle roller bearings - Radial needle roller and cage assemblies - Metric series - K,K.ZW
Official Classification 1Needle roller bearings / Radial needle roller and cage assemblies / Metric series / K,K.ZW
Technical Data14 parameters
Technical Data
ParameterSymbolValue
Fw45 mm
Ew52 mm
Bc21 mm
Basic Load Ratings : Cr35.0 kN
Basic Load Ratings : C0R63.2 kN
Fatigue Load Limit : Cu9.90 kN
Cage Material P/SS
Limiting Speeds(Grease Lub.)6200 min-1
Limiting Speeds(Oil Lub.)9500 min-1
Recommended Dimensions Shaft : S(Max.)45.000 mm
Recommended Dimensions Shaft : S(Min.)44.989 mm
Recommended Dimensions Housing : H(Max.)52.029 mm
Recommended Dimensions Housing : H(Min.)52.010 mm
Mass(Refer.)0.055 kg

Technical documents & data sheet

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Record identity
KOYO K45X52X21F
Document matching
Exact designation, assembly scope, revision and units must agree.

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