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SKF / Super-precision angular contact ball bearings

SKF 71920 ACD/HCP4ADGA

Matched set of two super-precision, high-capacity, d design, single row angular contact ball bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
100 mm
Outside diameterD
140 mm
WidthB
40 mm
Dynamic load ratingC
92.3 kN
Static load ratingC0
125 kN
Mass≈m
1.32 kg

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 specifications11 parameters
Core specifications
ParameterSymbolValue
Variant / constructionSuper-precision angular contact ball bearings
Bore diameterd100 mm
Outside diameterD140 mm
WidthB40 mm
Basic dynamic load ratingC92.3 kN
Basic static load ratingC0125 kN
Fatigue load limitPu3.55 kN
Mass≈m1.32 kg
SealingWithout
Bearing materialHybrid (ceramic balls)
LubricantNone
Dimensions4 parameters
Dimensions
ParameterSymbolValue
Bore diameter100.0 mm
Outside diameter140.0 mm
Width40.0 mm
Contact angle25.0 °
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categorySuper-precision angular contact ball bearings
Official taxonomy path/products/super-precision-bearings/angular-contact-ball-bearings
Structure group IDBA1_010
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions7 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of shaft abutmentd amin. 106 mm
Diameter of shaft abutmentd bmin. 106 mm
Diameter of housing abutmentD amax. 134 mm
Diameter of housing abutmentD bmax. 136 mm
Radius of filletr amax. 1 mm
Radius of filletr bmax. 0.6 mm
Position of oil nozzled n115.6 mm
Engineering — Calculation data10 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC92.3 kN
Basic static load ratingC 0125 kN
Fatigue load limitP u3.55 kN
Attainable speed for grease lubricationTo be calculated: Single bearing (9500) x speed reduction factor (see table below)
Attainable speed for oil-air lubricationTo be calculated: Single bearing (15000) x speed reduction factor (see table below)
Contact angleα25 °
Ball diameterD w12.7 mm
Number of rowsi2
Number of balls (per bearing)z26
Reference grease quantity (per bearing)G ref10.5 cm³
Engineering — Calculation data — Correction factors for preload calculation4 parameters
Engineering — Calculation data — Correction factors for preload calculation
ParameterSymbolValue
Correction factor dependent on bearing series and sizef1.2
Correction factor dependent on contact anglef 10.98
Correction factor, preload class Af 2A1
Correction factor for hybrid bearingsf HC1
Engineering — Calculation data — Factors for equivalent bearing load calculation13 parameters
Engineering — Calculation data — Factors for equivalent bearing load calculation
ParameterSymbolValue
Calculation factore0.68
Axial load factor (single, tandem)Y 10
Axial load factor (single, tandem)Y 20.87
Axial load factor (single, tandem)Y 00.38
Radial load factor (single, tandem)X 11
Radial load factor (single, tandem)X 20.41
Radial load factor (single, tandem)X 00.5
Axial load factor (back-to-back, face-to-face)Y 10.92
Axial load factor (back-to-back, face-to-face)Y 21.4
Axial load factor (back-to-back, face-to-face)Y 00.76
Radial load factor (back-to-back, face-to-face)X 11
Radial load factor (back-to-back, face-to-face)X 20.67
Radial load factor (back-to-back, face-to-face)X 01
Engineering — Calculation data — Preload and stiffness (back-to-back, face-to-face)3 parameters
Engineering — Calculation data — Preload and stiffness (back-to-back, face-to-face)
ParameterSymbolValue
Preload classA
PreloadG360 N
Axial stiffness283 N/µm
Engineering — Dimensions8 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd100 mm
Outside diameterD140 mm
WidthB40 mm
Shoulder diameter of inner ring (large side face)d 1112.3 mm
Shoulder diameter of inner ring (small side face)d 2112.3 mm
Shoulder diameter of outer ring (large side face)D 1127.7 mm
Chamfer dimensionr 1,2min. 1.1 mm
Chamfer dimensionr 3,4min. 0.6 mm
Engineering — Engineering specifications1 parameter
Engineering — Engineering specifications
ParameterSymbolValue
Universal matching bearing(s)Yes, back-to-back (<>), face-to-face (> >)
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight1.32 kg
eClass code23-05-08-03
UNSPSC code31171531
Performance3 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating92.3 kN
Basic static load rating125.0 kN
NoteRefer to catalogue data or contact SKF for the attainable speeds
Properties14 parameters
Properties
ParameterSymbolValue
Contact typeNormal contact (two-point contact)
Number of rows2
Ring typeOne-piece inner and outer rings
DesignHigh-capacity D
Universal matching bearingYes, back-to-back (<>), face-to-face (> >)
Matched arrangementUniversal matching
Number of bearings in matched set2
Matched condition (axial clearance/ preload)Extra light preload
Tolerance classP4A
Material, bearingHybrid (ceramic balls)
CoatingWithout
SealingWithout
LubricantNone
Indicative carbon footprint for new product4.9 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF 71920 ACD/HCP4ADGA
Document matching
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