99,016 bearing records · search, filter and compare

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

KOYO K40X55X45H

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

Technical data available
Dynamic load ratingC
103 kN
Static load ratingC0
146 kN
Limiting speednG
7500 r/min
Mass≈m
0.221 kg
Fw
40 mm
Ew
55 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 ratingC103 kN
Basic static load ratingC0146 kN
Fatigue load limitPu23 kN
Limiting speednG7500 r/min
Mass≈m0.221 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
Fw40 mm
Ew55 mm
Bc45 mm
Basic Load Ratings : Cr103 kN
Basic Load Ratings : C0R146 kN
Fatigue Load Limit : Cu23.0 kN
Cage Material P/SS
Limiting Speeds(Grease Lub.)7500 min-1
Limiting Speeds(Oil Lub.)12000 min-1
Recommended Dimensions Shaft : S(Max.)40.000 mm
Recommended Dimensions Shaft : S(Min.)39.989 mm
Recommended Dimensions Housing : H(Max.)55.029 mm
Recommended Dimensions Housing : H(Min.)55.010 mm
Mass(Refer.)0.221 kg

Technical documents & data sheet

This product page is a BearingScope catalogue reference, not a manufacturer-certified drawing. Preserve the full brand and designation when comparing files.

Record identity
KOYO K40X55X45H
Document matching
Exact designation, assembly scope, revision and units must agree.

No verified redistributable CAD or manufacturer PDF is registered for this exact model. A catalogue image is not a dimensioned drawing. Missing technical files are not generated or replaced with unrelated models.

Look up another model or check drawing requirements →

Search the consolidated catalogue

Find, filter and compare bearing model data in one place.

Open model search