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SKF / Deep groove ball bearings

SKF 618/670 MA

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

Technical data available
Bore diameterd
670 mm
Outside diameterD
820 mm
WidthB
69 mm
Dynamic load ratingC
442 kN
Static load ratingC0
1000 kN
Limiting speednG
1100 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 specifications16 parameters
Core specifications
ParameterSymbolValue
Variant / constructionDeep groove ball bearings
Bore diameterd670 mm
Outside diameterD820 mm
WidthB69 mm
Basic dynamic load ratingC442 kN
Basic static load ratingC01000 kN
Fatigue load limitPu15.6 kN
Reference speednref1300 r/min
Limiting speednG1100 r/min
Mass≈m77.5 kg
Precision classNormal
Internal clearanceCN
SealingWithout
CageMachined brass
Bearing materialBearing steel
LubricantNone
Precision classification2 parameters
Precision classification
ParameterSymbolValue
Radial ball bearing tolerance equivalentABEC 1Derived from ISO Normal; not a direct ABEC marking
Mapping basisISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value.
Dimensions3 parameters
Dimensions
ParameterSymbolValue
Bore diameter670.0 mm
Outside diameter820.0 mm
Width69.0 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
RemanufacturableYes
Engineering — Abutment dimensions3 parameters
Engineering — Abutment dimensions
ParameterSymbolValue
Diameter of shaft abutmentd amin. 685 mm
Diameter of housing abutmentD amax. 805 mm
Radius of shaft or housing filletr amax. 3 mm
Engineering — Calculation data7 parameters
Engineering — Calculation data
ParameterSymbolValue
Basic dynamic load ratingC442 kN
Basic static load ratingC 01000 kN
Fatigue load limitP u15.6 kN
Reference speed1300 r/min
Limiting speed1100 r/min
Minimum load factork r0.02
Calculation factorf 017.4
Engineering — Dimensions10 parameters
Engineering — Dimensions
ParameterSymbolValue
Bore diameterd670 mm
Deviation limits of mid-range bore diametert Δdmp-0.075 to 0 mm
Outside diameterD820 mm
Deviation limits of mid-range outside diametert ΔDmp-0.1 to 0 mm
WidthB69 mm
Deviation limits of ring widtht ΔBs-0.75 to 0 mm
Shoulder diameterd 1≈ 718.3 mm
Shoulder diameterD 1≈ 771.25 mm
Chamfer dimensionr 1,2min. 4 mm
ISO tolerance class for dimensionsNormal
Engineering — Tolerances of run-out3 parameters
Engineering — Tolerances of run-out
ParameterSymbolValue
Range of section height at inner ring of assembled bearingt Kia80 µm
Range of section height at outer ring of assembled bearingt Kea140 µm
ISO tolerance class for geometrical tolerancesNormal
Logistics3 parameters
Logistics
ParameterSymbolValue
Product net weight77.5 kg
eClass code23-05-08-01
UNSPSC code31171504
Performance4 parameters
Performance
ParameterSymbolValue
Basic dynamic load rating442.0 kN
Basic static load rating1000.0 kN
Reference speed1300.0 r/min
Limiting speed1100.0 r/min
Properties15 parameters
Properties
ParameterSymbolValue
Filling slotsWithout
Number of rows1
Locating feature, bearing outer ringWithout
Bore typeCylindrical
CageMachined brass
Matched arrangementNo
Radial internal clearanceCN
Material, bearingBearing steel
CoatingWithout
SealingWithout
LubricantNone
Relubrication featureWithout
Candidate for remanufacturingYes
Indicative carbon footprint for new product287.0 kg CO 2 e
Indicative carbon footprint for remanufactured product95.3 kg CO 2 e

Technical documents & data sheet

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Record identity
SKF 618/670 MA
Document matching
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