Double row cylindrical roller bearings are designed to accommodate high to very high radial loads in combination with medium to high speeds. The AKMI assortment includes many designs and variants, such as standard and full complement bearings and also greased and sealed bearings. Depending on the configuration of the outer and inner rings, the bearings are available in locating as well as non-locating designs.
| Design variant/feature | NNUB.2/C3WO |
| d | 340 mm | Bore diameter |
|---|---|---|
| D | 520 mm | Outside diameter |
| B | 305 mm | Overall bearing width |
| C | 200 mm | Width outer ring |
| D1 | ≈ 461 mm | Shoulder diameter outer ring |
| F | 384 mm | Raceway diameter inner ring |
| r1,2 | min. 5 mm | Chamfer dimension outer ring |
| r3,4 | min. 5 mm | Chamfer dimension inner ring |
| s | max. 45 mm | Permissible axial displacement from the normal position of one bearing ring relative to the other |
| da | min. 360 mm | Abutment diameter spacer sleeve |
|---|---|---|
| da | max. 374 mm | Abutment diameter spacer sleeve |
| db | min. 388 mm | Abutment diameter shaft |
| Da | max. 500 mm | Abutment diameter spacer sleeve / housing |
| ra | max. 4 mm | Fillet radius |
| rb | max. 4 mm | Fillet radius |
| Basic dynamic load rating | C | 3 300 kN |
|---|---|---|
| Basic static load rating | C0 | 7 100 kN |
| Fatigue load limit | Pu | 610 kN |
| Reference speed | 900 r/min | |
| Limiting speed | 1 300 r/min | |
| Calculation factor | kr | 0.38 |
General bearing specifications
Bearing interfaces
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