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SKF / Tapered roller bearings

SKF 31308/CL7CDF

Matched tapered roller bearings arranged face-to-face technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
40 mm
Outside diameterD
90 mm
WidthB
50.5 mm
Dynamic load ratingC
156 kN
Static load ratingC0
163 kN
Limiting speednG
7500 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 specifications13 parameters
Core specifications
ParameterSymbolValue
Variant / constructionTapered roller bearings
Bore diameterd40 mm
Outside diameterD90 mm
WidthB50.5 mm
Basic dynamic load ratingC156 kN
Basic static load ratingC0163 kN
Fatigue load limitPu19 kN
Reference speednref4500 r/min
Limiting speednG7500 r/min
Mass≈m1.49 kg
SealingWithout
CageSheet metal
LubricantNone
Dimensions6 parameters
Dimensions
ParameterSymbolValue
Bore diameter40.0 mm
Outside diameter90.0 mm
Width, total50.5 mm
Width, inner ring46.0 mm
Width, outer ring50.5 mm
Contact angle28.8 °
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryTapered roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/tapered-roller-bearings/matched-tapered-roller-bearings
Structure group IDBT2_010
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions6 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of shaft abutmentd amax. 51 mm
Diameter of housing abutmentD amin. 71 mm
Diameter of housing abutmentD amax. 82.5 mm
Minimum width of space required in housing on large side faceC amin. 3 mm
Radius of filletr amax. 2 mm
Radius of filletr cmax. 0.6 mm
Engineering — Calculation data10 parameters
Engineering — Calculation data
ParameterSymbolValue
SKF performance classSKF Explorer
Basic dynamic load ratingC156 kN
Basic static load ratingC 0163 kN
Fatigue load limitP u19 kN
Reference speed4500 r/min
Limiting speed7500 r/min
Limiting valuee0.83
Calculation factorY 10.81
Calculation factorY 21.2
Calculation factorY 00.8
Engineering — Dimensions8 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd40 mm
Outside diameterD90 mm
Total widthT50.5 mm
Width of inner rings2B46 mm
Width of lubrication grooveb11 mm
Diameter of lubrication holeK8 mm
Chamfer dimensionr 3,4min. 1.5 mm
Chamfer dimensionr 5min. 0.6 mm
Logistics2 parameters
Logistics
ParameterSymbolValue
Product net weight1.49 kg
eClass code23-05-09-10
Performance5 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating156.0 kN
Basic static load rating163.0 kN
Reference speed4500.0 r/min
Limiting speed7500.0 r/min
SKF performance classSKF Explorer
Properties12 parameters
Properties
ParameterSymbolValue
Bearing partComplete bearing
Number of rows2
Locating feature, bearing outer ringWithout
Bore typeCylindrical
CageSheet metal
Matched arrangementFace-to-face (X)
Number of bearings in matched set2
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWith
Indicative carbon footprint for new product5.5 kg CO 2 e

Technical documents & data sheet

This product page is a BearingScope catalogue reference, not a manufacturer-certified drawing. Preserve the full brand and designation when comparing files.

Record identity
SKF 31308/CL7CDF
Document matching
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