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SKF / Cylindrical roller bearings

SKF NU 321 ECP

Single row cylindrical roller bearing, nu design technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
105 mm
Outside diameterD
225 mm
WidthB
49 mm
Dynamic load ratingC
500 kN
Static load ratingC0
500 kN
Limiting speednG
3800 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 / constructionCylindrical roller bearings
Bore diameterd105 mm
Outside diameterD225 mm
WidthB49 mm
Basic dynamic load ratingC500 kN
Basic static load ratingC0500 kN
Fatigue load limitPu57 kN
Reference speednref3200 r/min
Limiting speednG3800 r/min
Mass≈m8.53 kg
Internal clearanceCN
SealingWithout
CageNon-metallic
LubricantNone
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter105.0 mm
Outside diameter225.0 mm
Width49.0 mm
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryCylindrical roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/cylindrical-roller-bearings/single-row-cylindrical-roller-bearings
Structure group IDBC1_001_101
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions6 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of spacer sleeved amin. 119 mm
Diameter of spacer sleeved amax. 129 mm
Diameter of shaft abutmentd bmin. 136 mm
Diameter of housing abutmentD amax. 209.4 mm
Radius of filletr amax. 2.5 mm
Radius of filletr bmax. 2.5 mm
Engineering — Calculation data9 parameters
Engineering — Calculation data
ParameterSymbolValue
SKF performance classSKF Explorer
Basic dynamic load ratingC500 kN
Basic static load ratingC 0500 kN
Fatigue load limitP u57 kN
Reference speed3200 r/min
Limiting speed3800 r/min
Minimum load factork r0.15
Limiting valuee0.2
Calculation factorY0.6
Engineering — Dimensions8 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd105 mm
Outside diameterD225 mm
WidthB49 mm
Shoulder diameter of outer ringD 1≈ 189 mm
Raceway diameter of inner ringF133 mm
Chamfer dimensionr 1,2min. 3 mm
Chamfer dimensionr 3,4min. 3 mm
Permissible axial displacementsmax. 3.4 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight8.53 kg
eClass code23-05-09-01
UNSPSC code31171505
Performance5 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating500.0 kN
Basic static load rating500.0 kN
Reference speed3200.0 r/min
Limiting speed3800.0 r/min
SKF performance classSKF Explorer
Properties16 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
Axial displacement capabilityIn both directions
Number of rows1
Locating feature, bearing outer ringWithout
Bore typeCylindrical
CageNon-metallic
Number of flanges, outer ring2
Number of flanges, inner ring0
Loose flangeNone
Radial internal clearanceCN
Tolerance classNormal
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Indicative carbon footprint for new product31.6 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF NU 321 ECP
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