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SKF / Angular contact ball bearings

SKF 3309 DMA

Double row angular contact ball bearing with two-piece inner ring technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
45 mm
Outside diameterD
100 mm
WidthB
39.7 mm
Dynamic load ratingC
79.3 kN
Static load ratingC0
69.5 kN
Limiting speednG
6300 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 / constructionAngular contact ball bearings
Bore diameterd45 mm
Outside diameterD100 mm
WidthB39.7 mm
Basic dynamic load ratingC79.3 kN
Basic static load ratingC069.5 kN
Fatigue load limitPu3 kN
Reference speednref7500 r/min
Limiting speednG6300 r/min
Mass≈m1.61 kg
SealingWithout
CageMachined brass
Bearing materialBearing steel
LubricantNone
Dimensions4 parameters
Dimensions
ParameterSymbolValue
Bore diameter45.0 mm
Outside diameter100.0 mm
Width39.7 mm
Contact angle45.0 °
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryAngular contact ball bearings
Official taxonomy path/products/rolling-bearings/ball-bearings/angular-contact-ball-bearings/double-row-angular-contact-ball-bearings
Structure group IDBA2_001
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions3 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Abutment diameter shaftd amin. 54 mm
Abutment diameter housingD amax. 91 mm
Fillet radiusr amax. 1.5 mm
Engineering — Calculation data11 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC79.3 kN
Basic static load ratingC 069.5 kN
Fatigue load limitP u3 kN
Reference speed7500 r/min
Limiting speed6300 r/min
Calculation factork r0.1
Limiting valuee1.3
Calculation factorX0.54
Calculation factorY 00.44
Calculation factorY 10.47
Calculation factorY 20.81
Engineering — Dimensions7 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd45 mm
Outside diameterD100 mm
WidthB39.7 mm
Shoulder diameter inner ring for two-piece inner ringd 1≈ 70 mm
Shoulder diameter outer ringD 1≈ 86.35 mm
Chamfer dimension inner ring for two-piece inner ringr 1,2min. 1.5 mm
Distance pressure point(s)a93 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight1.61 kg
eClass code23-05-08-03
UNSPSC code31171531
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating79.3 kN
Basic static load rating69.5 kN
Reference speed7500.0 r/min
Limiting speed6300.0 r/min
Properties15 parameters
Properties
ParameterSymbolValue
Contact typeNormal contact (two-point contact)
Number of rows2
Locating feature, bearing outer ringWithout
Ring typeTwo-piece inner ring and one-piece outer ring
CageMachined brass
Arrangement of contact angle (double-row bearing)Back-to-back (O)
Matched arrangementNo
Universal matching bearingNo
Axial internal clearanceCN
Material, bearingBearing steel
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Indicative carbon footprint for new product6.0 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF 3309 DMA
Document matching
Exact designation, assembly scope, revision and units must agree.

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