Description
Dimensions
| d | 75 mm | Bore diameter |
|---|---|---|
| D | 115 mm | Outside diameter |
| T | 62 mm | Total width |
| 2B | 62 mm | Width of inner rings |
| b | 7.2 mm | Width of lubrication groove |
| K | 5 mm | Diameter of lubrication hole |
| r3,4 | min. 1.5 mm | Chamfer dimension |
| r5 | min. 0.6 mm | Chamfer dimension |
Abutment dimensions
| da | max. 84 mm | Diameter of shaft abutment |
|---|---|---|
| Da | min. 104 mm | Diameter of housing abutment |
| Da | max. 106.5 mm | Diameter of housing abutment |
| Ca | min. 6 mm | Minimum width of space required in housing on large side face |
| ra | max. 1.5 mm | Radius of fillet |
| rc | max. 0.6 mm | Radius of fillet |
Calculation data
| NR performance class | NR Explorer | |
| Basic dynamic load rating | C | 286 kN |
| Basic static load rating | C0 | 455 kN |
| Fatigue load limit | Pu | 52 kN |
| Reference speed | 3 600 r/min | |
| Limiting speed | 5 300 r/min | |
| Limiting value | e | 0.3 |
| Calculation factor | Y1 | 2.3 |
| Calculation factor | Y2 | 3.4 |
| Calculation factor | Y0 | 2.2 |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal + CL7C, P5, total width
- Internal clearance: values
Bearing interfaces
- Seat tolerances for standard conditions
- Tolerances and resultant fit
Matched tapered roller bearings arranged face-to-face (X-arrangement, load lines diverge towards the bearing axis) accommodate high radial loads and axial loads in both directions. The precision manufactured intermediate ring between the outer rings enables a defined internal clearance or preload to be achieved when mounted. Matched tapered roller bearings are typically used in gearboxes, hoisting equipment, rolling mills, and machines in the mining industry.
- High radial load carrying capacity
- Designed for axial loads in both directions
- Relatively high stiffness
- Surface finish on the contact surfaces of the rollers and raceways that enhances operational reliability
