BC4-0103 bearings ( 160 mm x 230 mm x 168 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 | BC4-0103 |
| Interchangeable | SKF BC4-0103 |
| Bearing Type | Four-row cylindrical roller bearing for rolling mills |
| Cage | Machined brass cage |
| Radial internal clearance | C4 |
| Seal | Open |
| Bore Type | Cylindrical bore |
| Design variant | BC4.1/WO |
| Series | BC4-01.. |
| Coating | No |
| Units | Metric |
| Weight [lb] | 51.367 |
| Equivalent | 315189 A |
| Lubricant | No |
| Bearing part | Complete |
| Ring | outer ring(5),inner ring(0) |
| Flange | No |
| Separable bearing ring | LBC4-0103 |
| Bearing ring with roller and cage assembly | RBC4-0103 |
| Relubrication | No |
| Heat stabilized | 150 °C(300 °F) |
| Cr Radial Dynamic [lbf] | 289773 |
| C0r Radial Static [lbf] | 494075 |
| Pu Fatigue load limit [lbf] | 53719 |
| nB Speed ratings (grease) [rpm] | 2181 |
| nG Speed ratings (oil) [rpm] | 3190 |
| Dimension | |
| d φ Inside [inch] | 6.299 |
| D Φ Outside [inch] | 9.055 |
| B Inner Width [inch] | 6.614 |
| C Outer Width [inch] | 6.614 |
| D1 [inch] | 8.028 |
| F [inch] | 7.047 |
| r1, r2(min.) [mm] | 2 |
| r3, r4(min.) [mm] | 2 |
| s Permissible axial displacement [inch] | 0.118 |
The BC4-0103 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.















