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SKF / Cylindrical roller bearings

SKF NNU 4176 M

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

Technical data available
Bore diameterd
380 mm
Outside diameterD
620 mm
WidthB
243 mm
Dynamic load ratingC
4290 kN
Static load ratingC0
8500 kN
Limiting speednG
1100 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 diameterd380 mm
Outside diameterD620 mm
WidthB243 mm
Basic dynamic load ratingC4290 kN
Basic static load ratingC08500 kN
Fatigue load limitPu680 kN
Reference speednref850 r/min
Limiting speednG1100 r/min
Mass≈m284 kg
Internal clearanceCN
SealingWithout
CageMachined brass
LubricantNone
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter380.0 mm
Outside diameter620.0 mm
Width243.0 mm
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryCylindrical roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/cylindrical-roller-bearings/double-row-cylindrical-roller-bearings
Structure group IDBC2_001
Available from SKFYes
RemanufacturableYes
Engineering — Abutment dimensions6 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Abutment diameter spacer sleeved amin. 400 mm
Abutment diameter spacer sleeved amax. 434 mm
Abutment diameter shaftd bmin. 447 mm
Abutment diameter spacer sleeve / housingD amax. 600 mm
Fillet radiusr amax. 4 mm
Fillet radiusr bmax. 4 mm
Engineering — Calculation data6 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC4290 kN
Basic static load ratingC 08500 kN
Fatigue load limitP u680 kN
Reference speed850 r/min
Limiting speed1100 r/min
Calculation factork r0.33
Engineering — Dimensions8 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd380 mm
Outside diameterD620 mm
Overall bearing widthB243 mm
Shoulder diameter outer ringD 1≈ 550 mm
Raceway diameter inner ringF442 mm
Chamfer dimension outer ringr 1,2min. 5 mm
Chamfer dimension inner ringr 3,4min. 5 mm
Permissible axial displacement from the normal position of one bearing ring relative to the othersmax. 7.4 mm
Engineering — Engineering specifications1 parameter
Engineering — Engineering specifications
ParameterSymbolValue
Design variant/featureNNU
Logistics2 parameters
Logistics
ParameterSymbolValue
Product net weight284.0 kg
eClass code23-05-09-01
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating4290.0 kN
Basic static load rating8500.0 kN
Reference speed850.0 r/min
Limiting speed1100.0 r/min
Properties18 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
Axial displacement capabilityIn both directions
Number of rows2
Locating feature, bearing outer ringWithout
Bore typeCylindrical
CageMachined brass
Number of flanges, outer ring3
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 product1050.0 kg CO 2 e
Indicative carbon footprint for remanufactured product349.0 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF NNU 4176 M
Document matching
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