522518A bearings ( 260 mm x 400 mm x 250 mm) have the advantages of Extremely high radial load capacity, high rigidity, separable design, and are therefore widely used in the metallurgical rolling mills, large gearboxes, and heavy-duty extrusion presses.

| Part Number | 522518A |
| Interchangeable | FAG 522518A |
| Desgin Figure | 1 |
| Cage | machined brass cages |
| Seal | Open |
| Bearing Type | Cylindrical Roller Bearings, four row |
| Bearing Weight [lb] | 240.301 |
| d φ Inside [inch] | 10.236 |
| D Φ Outside [inch] | 15.748 |
| B Width [inch] | 9.843 |
| F Raceway diameter inner ring [inch] | 12.205 |
| d1 [inch] | 11.056 |
| rs min Chamfer inner rings | 1.5 mm |
| r1s min Chamfer outer rings | 3 mm |
| Cr Radial Dynamic [lbf] | 674400 |
| C0r Radial Static [lbf] | 1213920 |
The 522518A Four-row cylindrical roller bearings mainly consist of an inner ring, an outer ring, four rows of cylindrical rollers, a cage, and a spacer. Common structures use a configuration of double outer rings (each with double raceways) and a single inner ring (with four raceways), or an interchangeable combination of inner and outer rings. Axial positioning and load distribution are achieved through the spacer.
The advantages of four-row cylindrical roller bearings are their extremely high radial load capacity, high rigidity, and the line contact between the rollers and raceways, resulting in a low coefficient of friction and allowing for high-speed operation under heavy loads. They can also be used as floating end bearings, capable of withstanding axial displacement caused by thermal expansion, and are easy to install and maintain.















