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SKF / Tapered roller bearings

SKF 331978 BG

Four-row tapered roller bearing technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
540 mm
Outside diameterD
690 mm
Dynamic load ratingC
7480 kN
Static load ratingC0
21200 kN
Mass≈m
372 kg
Bore diameter
540.0 mm

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 specifications10 parameters
Core specifications
ParameterSymbolValue
Variant / constructionTapered roller bearings
Bore diameterd540 mm
Outside diameterD690 mm
Basic dynamic load ratingC7480 kN
Basic static load ratingC021200 kN
Fatigue load limitPu1500 kN
Mass≈m372 kg
SealingWithout
CageSheet metal
LubricantNone
Dimensions6 parameters
Dimensions
ParameterSymbolValue
Bore diameter540.0 mm
Outside diameter690.0 mm
Width, total400.0 mm
Width, inner ring400.0 mm
Width, outer ring400.0 mm
Contact angle12.5 °
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryTapered roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/tapered-roller-bearings/four-row-tapered-roller-bearings
Structure group IDBT4_001
Available from SKFYes
RemanufacturableYes
Engineering — Calculation data10 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC7480 kN
Basic static load ratingC 021200 kN
Fatigue load limitP u1500 kN
Comparative radial load ratingC F1860 kN
Comparative axial load ratingC Fa301 kN
Thrust factorK1.8
Limiting valuee0.33
Calculation factorY 12
Calculation factorY 23
Calculation factorY 02
Engineering — Dimensions8 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd540 mm
Outside diameterD690 mm
Total bearing width over inner ringsB400 mm
Total bearing width over outer ringsT400 mm
Abutment diameter shaftd 1≈ 566 mm
Abutment diameter housingD 1≈ 643 mm
Chamfer dimension inner ringr 1,2min. 2 mm
Outer ring radius (chamfer)r 3,4min. 5 mm
Engineering — Engineering specifications2 parameters
Engineering — Engineering specifications
ParameterSymbolValue
Design variant/featureTQON/GW
Bore typeCylindrical with helical groove
Logistics2 parameters
Logistics
ParameterSymbolValue
Product net weight372.0 kg
eClass code23-05-09-10
Performance2 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating7480.0 kN
Basic static load rating21200.0 kN
Properties15 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
DesignTQO
Number of rows4
Locating feature, bearing outer ringWithout
Bore typeCylindrical with helical groove
CageSheet metal
Arrangement of contact angle (double-row bearing)Not applicable
Matched arrangementNo
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWith
Candidate for remanufacturingYes
Indicative carbon footprint for new product1376.0 kg CO 2 e
Indicative carbon footprint for remanufactured product458.0 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF 331978 BG
Document matching
Exact designation, assembly scope, revision and units must agree.

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