315257A Four-row Cylindrical Roller Bearing For Rolling Mills, Stamping Steel Cage
The 315257A Four-row cylindrical roller bearings is suitable for heavy machinery applications that bear huge radial loads. Classic applications include: support rolls of rolling mills, large gearboxes, heavy machine tool spindles, wind turbine spindles, ship propulsion shafts, and rotor supports for high-power compressors.
The 315257A bearing is a Four-row cylindrical roller bearing for rolling mills with an inner diameter of 610 mm , an outer diameter of 820 mm, a width of 430 mm. GCr15, ZGCr15, GCr15SiMn, 20Cr2Ni4A rings, GCr15, ZGCr15, GCr15SiMn, 20Cr2Ni4A rolling mlement. Its dynamic radial rated load is approximately 9347759 N, its static radial rated load is approximately 23598470 N. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: FCDP122164430 (China), 315257A (SKF)
315257A bearings ( 610 mm x 820 mm x 430 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 | 315257A |
| Interchangeable | SKF 315257A |
| Bearing Type | Four-row cylindrical roller bearing for rolling mills |
| Cage | Stamping steel cage |
| Seal | Open |
| Bore Type | Cylindrical bore |
| Design variant | E.6/WI |
| Series | 3152..A |
| Coating | No |
| Units | Metric |
| Weight [lb] | 1432.990 |
| Bearing part | Complete |
| Heat stabilized | 150 °C(300 °F) |
| Cr Radial Dynamic [lbf] | 2101376 |
| C0r Radial Static [lbf] | 5304936 |
| Pu Fatigue load limit [lbf] | 381942 |
| Dimension | |
| d φ Inside [inch] | 24.016 |
| D Φ Outside [inch] | 32.283 |
| B Inner Width [inch] | 16.929 |
| C Outer Width [inch] | 16.929 |
| D1 [inch] | 29.842 |
| F [inch] | 26.181 |
| r1, r2(min.) [mm] | 19x20° |
| r3, r4(min.) [mm] | 3 |
| b angular groove [inch] | 0.657 |
| K lubrication hole [inch] | 0.354 |
| kr Calculation coefficient | 0.46 |
The 315257A 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.
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