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 | NNU.3/C4W33WI |
| d | 420 mm | Bore diameter |
|---|---|---|
| D | 620 mm | Outside diameter |
| B | 200 mm | Overall bearing width |
| D1 | ≈ 550 mm | Shoulder diameter outer ring |
| F | 473 mm | Raceway diameter inner ring |
| b | 16.7 mm | Width of annular groove |
| K | 6 mm | Diameter lubrication hole |
| r1,2 | min. 4 mm | Chamfer dimension outer ring |
| r3,4 | min. 4 mm | Chamfer dimension inner ring |
| s | max. 4.4 mm | Permissible axial displacement from the normal position of one bearing ring relative to the other |
| da | min. 436 mm | Abutment diameter spacer sleeve |
|---|---|---|
| da | max. 468 mm | Abutment diameter spacer sleeve |
| db | min. 478 mm | Abutment diameter shaft |
| Da | max. 604 mm | Abutment diameter spacer sleeve / housing |
| ra | max. 3 mm | Fillet radius |
| rb | max. 3 mm | Fillet radius |
| Basic dynamic load rating | C | 3 470 kN |
|---|---|---|
| Basic static load rating | C0 | 7 800 kN |
| Fatigue load limit | Pu | 655 kN |
| Reference speed | 700 r/min | |
| Limiting speed | 1 100 r/min | |
| Calculation factor | kr | 0.29 |
General bearing specifications
Bearing interfaces
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