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SKF / Super-precision angular contact ball bearings

SKF 7021 ACD/HCP4AQBCD

Matched set of four 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
105 mm
Outside diameterD
160 mm
WidthB
104 mm
Dynamic load ratingC
242 kN
Static load ratingC0
365 kN
Mass≈m
5.17 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 diameterd105 mm
Outside diameterD160 mm
WidthB104 mm
Basic dynamic load ratingC242 kN
Basic static load ratingC0365 kN
Fatigue load limitPu10 kN
Mass≈m5.17 kg
SealingWithout
Bearing materialHybrid (ceramic balls)
LubricantNone
Dimensions4 parameters
Dimensions
ParameterSymbolValue
Bore diameter105.0 mm
Outside diameter160.0 mm
Width104.0 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 dimensions5 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of shaft abutmentd amin. 114 mm
Diameter of housing abutmentD bmax. 155 mm
Radius of filletr amax. 2 mm
Radius of filletr bmax. 1 mm
Position of oil nozzled n125.6 mm
Engineering — Calculation data10 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC242 kN
Basic static load ratingC 0365 kN
Fatigue load limitP u10 kN
Attainable speed for grease lubricationTo be calculated: Single bearing (9000) x speed reduction factor (see table below)
Attainable speed for oil-air lubricationTo be calculated: Single bearing (14000) x speed reduction factor (see table below)
Contact angleα25 °
Ball diameterD w17.462 mm
Number of rowsi4
Number of balls (per bearing)z21
Reference grease quantity (per bearing)G ref20.4 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 10.99
Correction factor, preload class Df 2D1.1
Correction factor for hybrid bearingsf HC1
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 classD
PreloadG8960 N
Axial stiffness1454 N/µm
Engineering — Dimensions6 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd105 mm
Outside diameterD160 mm
WidthB104 mm
Shoulder diameter of inner ring (large side face)d 1121.9 mm
Chamfer dimensionr 1,2min. 2 mm
Chamfer dimensionr 3,4min. 1 mm
Engineering — Engineering specifications1 parameter
Engineering — Engineering specifications
ParameterSymbolValue
Universal matching bearing(s)No
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight5.17 kg
eClass code23-05-08-03
UNSPSC code31171531
Performance3 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating242.0 kN
Basic static load rating365.0 kN
NoteRefer to catalogue data or contact SKF for the attainable speeds
Properties14 parameters
Properties
ParameterSymbolValue
Contact typeNormal contact (two-point contact)
Number of rows4
Ring typeOne-piece inner and outer rings
DesignHigh-capacity D
Universal matching bearingNo
Matched arrangement>
Number of bearings in matched set4
Matched condition (axial clearance/ preload)Heavy preload
Tolerance classP4A
Material, bearingHybrid (ceramic balls)
CoatingWithout
SealingWithout
LubricantNone
Indicative carbon footprint for new product19.1 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF 7021 ACD/HCP4AQBCD
Document matching
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