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SKF / Needle roller bearings

SKF NKI 55/25

Single row needle roller bearing with machined rings, with flanges technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
55 mm
Outside diameterD
72 mm
WidthB
25 mm
Dynamic load ratingC
46.5 kN
Static load ratingC0
90 kN
Limiting speednG
7500 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 specifications15 parameters
Core specifications
ParameterSymbolValue
Variant / constructionNeedle roller bearings
Bore diameterd55 mm
Outside diameterD72 mm
WidthB25 mm
Basic dynamic load ratingC46.5 kN
Basic static load ratingC090 kN
Fatigue load limitPu11.4 kN
Reference speednref6700 r/min
Limiting speednG7500 r/min
Mass≈m0.272 kg
Internal clearanceCN
SealingWithout
CageSheet metal
Bearing materialBearing steel
LubricantNone
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter55.0 mm
Outside diameter72.0 mm
Width25.0 mm
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryNeedle roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/needle-roller-bearings/needle-roller-bearings-with-machined-rings
Structure group IDBN1_003
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions2 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of housing abutmentD amax. 68 mm
Fillet radiusr amax. 0.6 mm
Engineering — Calculation data6 parameters
Engineering — Calculation data
ParameterSymbolValue
SKF performance classSKF Explorer
Basic dynamic load ratingC46.5 kN
Basic static load ratingC 090 kN
Fatigue load limitP u11.4 kN
Reference speed6700 r/min
Limiting speed7500 r/min
Engineering — Dimensions6 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd55 mm
Outside diameterD72 mm
WidthB25 mm
Raceway diameter outer ringE67 mm
Raceway diameter inner ringF60 mm
Chamfer dimension outer ringr 1,2min. 0.6 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight0.272 kg
eClass code23-05-09-03
UNSPSC code31171512
Performance5 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating46.5 kN
Basic static load rating90.0 kN
Reference speed6700.0 r/min
Limiting speed7500.0 r/min
SKF performance classSKF Explorer
Properties14 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
Number of rows1
Outer ring typeMachined (solid)
Aligning featureWithout
CageSheet metal
Number of flanges, outer ring2
Radial internal clearanceCN
Tolerance classNormal
Material, bearingBearing steel
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWith
Indicative carbon footprint for new product1.0 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF NKI 55/25
Document matching
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