Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 275 mm |
| Outside diameter | D | 485 mm |
| Width | B | 55 mm |
| Basic dynamic load rating | C | 255 kN |
| Basic static load rating | C0 | 365 kN |
| Mass | ≈m | 44.012 kg |
| Minimum operating temperature | Tmin | -25 °C |
| Maximum operating temperature | Tmax | 80 °C |
Manufacturer Identity3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 398391 | |
| Brand | INA | |
| Base Type | VU250380 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Four point contact bearings without gear teeth, sealed on both sides | |
| Short Description | Slewing ring, 4 point contact bearing, without gear teeth |
Technical Data27 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D1) | 275 mm | |
| Outside Diameter (Da) | 485 mm | |
| Total Height (H) | 55 mm | |
| Basic Static Load Rating, Axial (C0A) | 790,000 N | |
| Height Of Individual Ring (H) | 50 mm | |
| Operating Temperature Min. (Tmin) | -25 °C | |
| Pitch Circle Diameter Fixing Holes (La) | 453 mm | |
| Basic Dynamic Load Rating, Axial (Ca) | 280,000 N | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Bore Diameter Lower Tolerance (Bore Diamete) | 0.5 mm | |
| Normal Axial Clearance Min. (Normal Axial) | 0.11 mm | |
| Inner Diameter Outer Ring (Di) | 379 mm | |
| Normal Axial Clearance Max. (Normal Axial) | 0.41 mm | |
| Number Of Fixing Holes In Inner Ring (Ni) | 16 | |
| Fixing Bore (Db) | 18 mm | |
| Outside Diameter Inner Ring (Da) | 381 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 255,000 N | |
| Bore Diameter Upper Tolerance (Bore Diamete) | 0.5 mm | |
| Outside Diameter Lower Tolerance (Outside Diam) | 0.8 mm | |
| Basic Static Load Rating, Radial (C0R) | 365,000 N | |
| Max. Radial Load Screws (Frictional Contact) (Fr Zul) | 124,800 N | |
| Pitchcircle Diameter Fixing Holes Inner Ring (Li) | 307 mm | |
| Width Outer Ring (Ha) | 50 mm | |
| Normal Radial Clearance Min. (Normal Radia) | 0.06 mm | |
| Normal Radial Clearance Max. (Normal Radia) | 0.25 mm | |
| Number Of Fixing Holes In Outer Ring (Na) | 16 | |
| Outside Diameter Upper Tolerance (Outside Diam) | 0.8 mm |