Bearings, units and housings -- Super-precision bearings -- Axial-radial cylindrical roller bearings -- Axial-radial cylindrical roller bearings, super-precision -- SKF NRT 580 A
NRT 580 A
Dimensions
| d | 580 | mm | |
| D | 750 | mm | |
| H | 90 | mm | |
| d1 | 700 | mm | |
| C | 30 | mm | |
| H1 | 60 | mm | |
| J | 610 | mm | |
| J1 | 720 | mm | |
| N | 11.4 | mm | |
| N1 | 18 | mm | |
| N2 | 11.4 | mm | |
| a | 11 | mm | |
| r1 | min. | 1 | mm |
| r2 | min. | 1 | mm |
Calculation data
| Basic dynamic load rating - radial direction | C | 229 | kN | |
| Basic static load rating - radial direction | C0 | 965 | kN | |
| Basic dynamic load rating - axial direction | C | 285 | kN | |
| Basic static load rating - axial direction | C0 | 3550 | kN | |
| Attainable speed for grease lubrication | 60 | r/min | ||
| Attainable speed for oil-air lubrication | 120 | r/min | ||
| Axial preload | 25 | kN | ||
| Axial unloading force | 55 | kN | ||
| Frictional moment | CRL | 140 | N·m | |
| Axial stiffness | 43.5 | kN/µm | ||
| Radial stiffness | 18.6 | kN/µm | ||
| Moment stiffness | 1838 | kN·m/mrad |
Mass
| Mass bearing | 89 | kg |
Rotary table
| Guideline diameter | 1250 | mm |
Mounting information
| Retaining bolts | ||||
| Size | M10 | |||
| Number of bolts | 2 | |||
| Angle between bolts | 180 | ° | ||
| Removal threads | ||||
| Size | G | M12 | ||
| Number of threads | 6 | |||
| Angle between threads | 60 | ° | ||
| Required attachment bolts, shaft | ||||
| Bolt size | M10 | |||
| Pitch | a | 7.5 | ° | |
| Number of bolts | 46 | |||
| Number of bolts omitted at retaining bolts position | 2, 180° apart | |||
| Tightening torque (Bolt grade 10.9) | 68 | N·m | ||
| Required attachment bolts, housing | ||||
| Bolt size | M10 | |||
| Pitch | a | 7.5 | ° | |
| Number of bolts | 42 | |||
| Number of bolts omitted at removal thread position | 6, 60° apart | |||