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SKF / Cylindrical roller bearings

SKF NU 3188 ECMA/HB1

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

Technical data available
Bore diameterd
440 mm
Outside diameterD
720 mm
WidthB
226 mm
Dynamic load ratingC
5120 kN
Static load ratingC0
10000 kN
Limiting speednG
1200 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 diameterd440 mm
Outside diameterD720 mm
WidthB226 mm
Basic dynamic load ratingC5120 kN
Basic static load ratingC010000 kN
Fatigue load limitPu765 kN
Reference speednref700 r/min
Limiting speednG1200 r/min
Mass≈m375 kg
Internal clearanceCN
SealingWithout
CageMachined brass
LubricantNone
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter440.0 mm
Outside diameter720.0 mm
Width226.0 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
RemanufacturableYes
Engineering — Abutment dimensions5 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of spacer sleeved amin. 466 mm
Diameter of spacer sleeved amax. 500 mm
Diameter of shaft abutmentd bmin. 514 mm
Diameter of housing abutmentD amax. 694 mm
Radius of filletr amax. 5 mm
Engineering — Calculation data8 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC5120 kN
Basic static load ratingC 010000 kN
Fatigue load limitP u765 kN
Reference speed700 r/min
Limiting speed1200 r/min
Minimum load factork r0.21
Limiting valuee0.3
Calculation factorY0
Engineering — Dimensions7 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd440 mm
Outside diameterD720 mm
WidthB226 mm
Shoulder diameter of outer ringD 1≈ 637 mm
Raceway diameter of inner ringF509 mm
Chamfer dimensionr 1,2min. 6 mm
Permissible axial displacementsmax. 12.5 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight375.0 kg
eClass code23-05-09-01
UNSPSC code31171505
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating5120.0 kN
Basic static load rating10000.0 kN
Reference speed700.0 r/min
Limiting speed1200.0 r/min
Properties18 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
Axial displacement capabilityIn both directions
Number of rows1
Locating feature, bearing outer ringWithout
Bore typeCylindrical
CageMachined brass
Number of flanges, outer ring2
Number of flanges, inner ring0
Loose flangeNone
Radial internal clearanceCN
Tolerance classNormal
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Candidate for remanufacturingYes
Indicative carbon footprint for new product1388.0 kg CO 2 e
Indicative carbon footprint for remanufactured product461.0 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF NU 3188 ECMA/HB1
Document matching
Exact designation, assembly scope, revision and units must agree.

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