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INA / Slewing ring, 4 point contact bearing, external gear teeth

INA VSA250955-N

Slewing ring, 4 point contact bearing, external gear teeth technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
855 mm
Outside diameterD
1096 mm
WidthB
80 mm
Dynamic load ratingC
335 kN
Static load ratingC0
1560 kN
Mass≈m
155 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 specifications9 parameters
Core specifications
ParameterSymbolValue
SeriesVSA250955
Bore diameterd855 mm
Outside diameterD1096 mm
WidthB80 mm
Basic dynamic load ratingC335 kN
Basic static load ratingC01560 kN
Mass≈m155 kg
Minimum operating temperatureTmin-25 °C
Maximum operating temperatureTmax80 °C
Manufacturer Identity3 parameters
Manufacturer Identity
ParameterSymbolValue
Schaeffler Product Code398314
BrandINA
Base TypeVSA250955
Product Identity2 parameters
Product Identity
ParameterSymbolValue
ConstructionSlewing ring, 4 point contact bearing, external gear teeth
Short DescriptionSlewing ring, 4 point contact bearing, external gear teeth
Technical Data29 parameters
Technical Data
ParameterSymbolValue
Bore Diameter (D1)855 mm
Outside Diameter (Da)1,096 mm
Total Height (H)80 mm
Basic Static Load Rating, Axial (C0A)3,400,000 N
Number Of Teeth (Z)120
Height Of Individual Ring (H)54 mm
Operating Temperature Min. (Tmin)-25 °C
Pitch Circle Diameter Gearing (D0)1,080 mm
Modul Of Gearing (M)9 mm
Basic Dynamic Load Rating, Axial (Ca)370,000 N
Operating Temperature Max. (Tmax)80 °C
Pitchcircle Diameter Fixing Holes Inner Ring (Li)895 mm
Normal Axial Clearance Min. (Normal Axial)0.05 mm
Max. Tooth Force Root Fatigue Strenght (At A Shock Factor Of 1,2) (Fz Norm)55,100 N
Inner Diameter Outer Ring (Di)953 mm
Normal Axial Clearance Max. (Normal Axial)0.24 mm
Number Of Fixing Holes In Inner Ring (Ni)30
Fixing Bore (Db)22 mm
Outside Diameter Inner Ring (Da)957 mm
Basic Dynamic Load Rating, Radial (Cr)335,000 N
Thread Depth Oil Connector (Tg)40 mm
Max. Tooth Force Against Tooth Fracture (At A Shock Factor Of 1,35) (Fz Max)80,200 N
Basic Static Load Rating, Radial (C0R)1,560,000 N
Pitch Circle Diameter Fixing Holes (La)1,016 mm
Max. Radial Load Screws (Frictional Contact) (Fr Zul)363,000 N
Width Outer Ring (Ha)71 mm
Normal Radial Clearance Min. (Normal Radia)0.03 mm
Normal Radial Clearance Max. (Normal Radia)0.13 mm
Number Of Fixing Holes In Outer Ring (Na)30

Technical documents & data sheet

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Record identity
INA VSA250955-N
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