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SKF / Needle roller bearings

SKF BK 4020

Drawn cup needle roller bearing with a closed end technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Outside diameterD
47 mm
WidthB
20 mm
Dynamic load ratingC
24.2 kN
Static load ratingC0
53 kN
Limiting speednG
7000 r/min
Mass≈m
0.062 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 specifications13 parameters
Core specifications
ParameterSymbolValue
Variant / constructionNeedle roller bearings
Outside diameterD47 mm
WidthB20 mm
Basic dynamic load ratingC24.2 kN
Basic static load ratingC053 kN
Fatigue load limitPu6.4 kN
Reference speednref6300 r/min
Limiting speednG7000 r/min
Mass≈m0.062 kg
SealingWithout
CageSheet steel
Bearing materialBearing steel
LubricantNone
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter of needle roller complement40.0 mm
Outside diameter47.0 mm
Width20.0 mm
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryNeedle roller bearings
Official taxonomy path/products/rolling-bearings/roller-bearings/needle-roller-bearings/drawn-cup-needle-roller-bearings
Structure group IDBND_001
Available from SKFYes
RemanufacturableNo
Engineering — Associated products4 parameters
Engineering — Associated products
ParameterSymbolValue
Inner ring IR seriesIR 35x40x20.5
Inner ring LR seriesLR 35x40x20.5
Radial shaft seal with a low cross-sectional height, single lipG 40x47x4
Radial shaft seal with a low cross-sectional height, double lipSD 40x47x4
Engineering — Calculation data5 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC24.2 kN
Basic static load ratingC 053 kN
Fatigue load limitP u6.4 kN
Reference speed6300 r/min
Limiting speed7000 r/min
Engineering — Dimensions5 parameters
Engineering — Dimensions
ParameterSymbolValue
Diameter under rollersF w40 mm
Outside diameterD47 mm
WidthC20 mm
Depth of the drawn cup BKC 1min. 17.3 mm
Chamfer dimension drawn cup (outer ring)rmin. 0.8 mm
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight0.062 kg
eClass code23-05-09-03
UNSPSC code31171512
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating24.2 kN
Basic static load rating53.0 kN
Reference speed6300.0 r/min
Limiting speed7000.0 r/min
Properties13 parameters
Properties
ParameterSymbolValue
Bearing partBearing without inner ring
Number of rows1
Outer ring typeDrawn cup with one closed end
Aligning featureWithout
CageSheet steel
Number of flanges, outer ring2
Tolerance classNormal
Material, bearingBearing steel
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Indicative carbon footprint for new product0.23 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 BK 4020
Document matching
Exact designation, assembly scope, revision and units must agree.

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