527021 bearings ( 1000 mm x 1360 mm x 800 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 | 527021 |
| Interchangeable | FAG 527021 |
| Desgin Figure | 1 |
| Cage | pin type cages |
| Seal | Open |
| Bearing Type | Cylindrical Roller Bearings, four row for interference fit on the roll neck |
| Equivalent | FCDP200272800 (China) 316234A (SKF) 527021 (FAG) |
| Bearing Weight [lb] | 7674.213 |
| d φ Inside [inch] | 39.370 |
| D Φ Outside [inch] | 53.543 |
| B Width [inch] | 31.496 |
| F Raceway diameter inner ring [inch] | 43.346 |
| rs min Chamfer inner rings | 25x20° mm |
| r1s min Chamfer outer rings | 3 mm |
| Cr Radial Dynamic [lbf] | 7643200 |
| C0r Radial Static [lbf] | 18658400 |
The 527021 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.















