Bearings, units and housings -- Super-precision bearings -- Axial-radial cylindrical roller bearings -- Axial-radial cylindrical roller bearings, super-precision -- SKF NRT 80 B
NRT 80 B
Dimensions
| d | 80 | mm | |
| D | 146 | mm | |
| H | 35 | mm | |
| d1 | 130 | mm | |
| C | 12 | mm | |
| H1 | 23.35 | mm | |
| J | 92 | mm | |
| J1 | 138 | mm | |
| N | 5.6 | mm | |
| N1 | 10 | mm | |
| N2 | 4.6 | mm | |
| a | 4 | mm | |
| r1 | min. | 0.3 | mm |
| r2 | min. | 0.3 | mm |
Calculation data
| Basic dynamic load rating - radial direction | C | 55 | kN | |
| Basic static load rating - radial direction | C0 | 102 | kN | |
| Basic dynamic load rating - axial direction | C | 37.5 | kN | |
| Basic static load rating - axial direction | C0 | 200 | kN | |
| Attainable speed for grease lubrication | 350 | r/min | ||
| Attainable speed for oil-air lubrication | 700 | r/min | ||
| Axial preload | 1.3 | kN | ||
| Axial unloading force | 2.8 | kN | ||
| Frictional moment | CRL | 3 | N·m | |
| Axial stiffness | 5 | kN/µm | ||
| Radial stiffness | 3.1 | kN/µm | ||
| Moment stiffness | 7 | kN·m/mrad |
Mass
| Mass bearing | 2.3 | kg |
Rotary table
| Guideline diameter | 200 | mm |
Mounting information
| Retaining bolts | ||||
| Size | M5 | |||
| Number of bolts | 2 | |||
| Angle between bolts | 180 | ° | ||
| Removal threads | ||||
| Size | G | M5 | ||
| Number of threads | 3 | |||
| Angle between threads | 120 | ° | ||
| Required attachment bolts, shaft | ||||
| Bolt size | M5 | |||
| Pitch | a | 30 | ° | |
| Number of bolts | 10 | |||
| Tightening torque (Bolt grade 10.9) | 8.5 | N·m | ||
| Required attachment bolts, housing | ||||
| Bolt size | M4 | |||
| Pitch | a | 30 | ° | |
| Number of bolts | 9 | |||
| Tightening torque (Bolt grade 10.9) | 4.5 | N·m | ||