Z-538221.ZL Cylindrical Roller Bearings Four-row
The Z-538221.ZL 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 Z-538221.ZL bearing is a Cylindrical roller bearings Four-row with an inner diameter of 440 mm , an outer diameter of 650 mm, a width of 355 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic radial rated load is approximately 8794281 N, its static radial rated load is approximately 17592161 N. It uses CN standard radial clearance, without seals type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Z-538221.ZL bearings 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 | Z-538221.ZL |
| Series | Z-53..ZL |
| Units | Metric |
| Bearing Type | Cylindrical roller bearings Four-row |
| Manufacturer Part Code | Z-538221.ZL |
| Interchangeable | FAG Z-538221.ZL |
| Temperature - T(min) | -30 °C |
| Temperature - T(max) | +150 °C |
| Roller Material | GCr15SiMn |
| Ring Material | GCr15SiMn |
| Load direction | radial |
| Alias | Non-locating bearings |
| Design drawing | 10 |
| More | Without lubrication grooves in the end faces of the outer rings |
| Cr - Radial Dynamic Load [N] | 8794281 |
| C0r - Radial Static Load [N] | 17592161 |
| Cur - Radial Fatigue Load [N] | 1594746 |
| m - Bearing Mass [kg] | 382 |
| d φ - Dimension Inside [mm] | 440 |
| D Φ - Dimension Outside [mm] | 650 |
| B - Dimension Width [mm] | 355 |
| C - Dimension Width [mm] | 355 |
| F - Dimension [mm] | 509.5 |
| d1 - Dimension [mm] | 469.583 |
| r(min.) - Chamfer [mm] | 6 |
| r1(min.) - Chamfer [mm] | 3 |
The Z-538221.ZL 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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