86FC59420 bearings ( 430 mm x 591 mm x 420 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 | 86FC59420 |
| Interchangeable | KOYO 86FC59420 |
| Desgin Figure | 2-2P |
| Cage | machined steel cages - pin type |
| Radial internal clearance | C3 |
| Seal | Open |
| Bearing Type | Four-row cylindrical roller bearing for cold rolling mill, hot rolling mill, billet mill |
| Design type | Outer ring with rib, Two inner rings |
| Bearing Weight [lb] | 760.587 |
| d φ Inside [inch] | 16.929 |
| D Φ Outside [inch] | 23.268 |
| B Width [inch] | 16.535 |
| Fw Raceway diameter inner ring [inch] | 18.583 |
| C [inch] | 16.535 |
| r min Chamfer outer ring | 5 mm |
| r1 min Chamfer inner ring | 5 mm |
| Cr Radial Dynamic [lbf] | 1472440 |
| C0r Radial Static [lbf] | 3776640 |
| Mounting dimensions | |
| da min shaft [inch] | 17.795 |
| Da max housing [inch] | 22.402 |
| Da min housing [inch] | 21.732 |
| ra max Fillet radius [inch] | 0.157 |
| rb max Fillet radius [inch] | 0.157 |
The 86FC59420 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.















