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SKF / Needle roller bearings

SKF NA 4903 RS

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

Technical data available
Bore diameterd
17 mm
Outside diameterD
30 mm
WidthB
14 mm
Dynamic load ratingC
9.52 kN
Static load ratingC0
12.9 kN
Limiting speednG
9000 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 specifications14 parameters
Core specifications
ParameterSymbolValue
Variant / constructionNeedle roller bearings
Bore diameterd17 mm
Outside diameterD30 mm
WidthB14 mm
Basic dynamic load ratingC9.52 kN
Basic static load ratingC012.9 kN
Fatigue load limitPu1.53 kN
Limiting speednG9000 r/min
Mass≈m0.04 kg
Internal clearanceCN
SealingSeal on one side
CageSheet metal
Bearing materialBearing steel
LubricantGrease
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter17.0 mm
Outside diameter30.0 mm
Width14.0 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 dimensions3 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Smallest permissible abutment diameter shaft, bearings with flangesd amin. 19 mm
Diameter of housing abutmentD amax. 28 mm
Fillet radiusr amax. 0.3 mm
Engineering — Calculation data4 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC9.52 kN
Basic static load ratingC 012.9 kN
Fatigue load limitP u1.53 kN
Limiting speed9000 r/min
Engineering — Dimensions7 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd17 mm
Outside diameterD30 mm
WidthB14 mm
Width outer ringC13 mm
Raceway diameter inner ringF22 mm
Chamfer dimension outer ringr 1,2min. 0.3 mm
Permissible axial displacement from the normal position of one bearing ring relative to the othersmax. 0.5 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight0.04 kg
eClass code23-05-09-03
UNSPSC code31171512
Performance3 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating9.52 kN
Basic static load rating12.9 kN
Limiting speed9000.0 r/min
Properties15 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
SealingSeal on one side
Sealing typeContact
LubricantGrease
Relubrication featureWith
Indicative carbon footprint for new product0.15 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF NA 4903 RS
Document matching
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