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SKF / Deep groove ball bearings

SKF 618/4

Deep groove ball bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
4 mm
Outside diameterD
9 mm
WidthB
2.5 mm
Dynamic load ratingC
0.423 kN
Static load ratingC0
0.116 kN
Limiting speednG
85000 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 specifications15 parameters
Core specifications
ParameterSymbolValue
Variant / constructionDeep groove ball bearings
Bore diameterd4 mm
Outside diameterD9 mm
WidthB2.5 mm
Basic dynamic load ratingC0.423 kN
Basic static load ratingC00.116 kN
Fatigue load limitPu0.005 kN
Reference speednref140000 r/min
Limiting speednG85000 r/min
Mass≈m0.0005 kg
Precision classP6
Internal clearanceCN
SealingWithout
Bearing materialBearing steel
LubricantNone
Precision classification2 parameters
Precision classification
ParameterSymbolValue
Radial ball bearing tolerance equivalentABEC 3Derived from ISO P6; not a direct ABEC marking
Mapping basisISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value.
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter4.0 mm
Outside diameter9.0 mm
Width2.5 mm
Product identity5 parameters
Product identity
ParameterSymbolValue
Official product categoryDeep groove ball bearings
Official taxonomy path/products/rolling-bearings/ball-bearings/deep-groove-ball-bearings
Structure group IDBB1_001_101
Available from SKFYes
RemanufacturableNo
Engineering — Abutment dimensions3 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of shaft abutmentd amin. 4.6 mm
Diameter of housing abutmentD amax. 8.4 mm
Radius of shaft or housing filletr amax. 0.1 mm
Engineering — Calculation data7 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC0.423 kN
Basic static load ratingC 00.116 kN
Fatigue load limitP u0.005 kN
Reference speed140000 r/min
Limiting speed85000 r/min
Minimum load factork r0.02
Calculation factorf 06.5
Engineering — Dimensions10 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd4 mm
Deviation limits of mid-range bore diametert Δdmp-0.007 to 0 mm
Outside diameterD9 mm
Deviation limits of mid-range outside diametert ΔDmp-0.007 to 0 mm
WidthB2.5 mm
Deviation limits of ring widtht ΔBs-0.12 to 0 mm
Shoulder diameterd 1≈ 5.2 mm
Shoulder diameterD 1≈ 7.5 mm
Chamfer dimensionr 1,2min. 0.1 mm
ISO tolerance class for dimensionsP6
Engineering — Tolerances of run-out3 parameters
Engineering — Tolerances of run-out
ParameterSymbolValue
Range of section height at inner ring of assembled bearingt Kia6 µm
Range of section height at outer ring of assembled bearingt Kea8 µm
ISO tolerance class for geometrical tolerancesP6
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight0.0005 kg
eClass code23-05-08-01
UNSPSC code31171504
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating0.423 kN
Basic static load rating0.116 kN
Reference speed140000.0 r/min
Limiting speed85000.0 r/min
Properties12 parameters
Properties
ParameterSymbolValue
Filling slotsWithout
Number of rows1
Locating feature, bearing outer ringWithout
Bore typeCylindrical
Matched arrangementNo
Radial internal clearanceCN
Material, bearingBearing steel
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Indicative carbon footprint for new product0.002 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 618/4
Document matching
Exact designation, assembly scope, revision and units must agree.

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