51248M Solid Brass Window Cage, Bore 240 Mm, Axial Deep Groove Ball Bearings, Single Direction
The 51248M Thrust ball bearings are widely used in axial positioning systems of heavy equipment, such as: large cranes (slewing mechanisms), hydroelectric generators (thrust bearings), ship propulsion shafts, heavy machine tools (vertical lathe worktables), mine hoists, and large rolling mills.
The 51248M bearing is a Axial deep groove ball bearings, Single direction with an inner diameter of 240 mm , an outer diameter of 340 mm, a width of 78 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15, GCr15SiMn rings, GCr15, GCr15SiMn rolling mlement. Its dynamic axial rated load is approximately 462277 N, its static axial rated load is approximately 1859898 N. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
51248M bearings ( 240 mm x 340 mm x 78 mm) have the advantages of Suitable for heavy-duty, low-speed conditions, capable of withstanding large unidirectional axial loads, with a stable and reliable structure, and are therefore widely used in the Large cranes, rotary tables, water turbines, heavy machine tools and metallurgical equipment.
| Part Number | 51248M |
| Bearing Type | Axial deep groove ball bearings, Single direction |
| Interchangeable | FAG 51248M |
| Cage | MP = Solid brass window cage, ball-guided |
| Equivalent | 51248MP |
| Accuracy class | PN (ABEC-1) |
| Series [lb] | 512 series (512..-MP) |
| Bearing Mass - m | 50.4853 |
| Dimension | |
| Inside - d φ [inch] | 9.4488 |
| Outside - D Φ [inch] | 13.3858 |
| Thickness - T [inch] | 3.0709 |
| D1 [inch] | 9.6063 |
| d1 [inch] | 13.1890 |
| chamfer - r(min.) [inch] | 0.0827 |
| Performance | |
| Dynamic Axial - Ca [lbf] | 103919 |
| Static Axial - C0a [lbf] | 418105 |
| Fatigue Axial - Cua [lbf] | 10606 |
| Speed ratings (grease) - nB [min–1] | 1451 |
| Speed ratings (oil) - nG [min–1] | 1060 |
| Mounting dimensions | |
| da(min.) [inch] | 11.8110 |
| Da(max.) [inch] | 11.0236 |
| ra(max.) [inch] | 0.0827 |
| Minimum load coefficient | |
| A | 18 |
The 51248M Thrust ball bearings mainly consist of a shaft ring, housing ring, steel balls, and a cage. The cage is often made of solid brass or cast iron to enhance load-bearing capacity and rigidity. Some models may include oil grooves and holes for lubrication.
Thrust ball bearings have extremely high axial load capacity and are suitable for bearing heavy unidirectional or bidirectional axial loads. Their large size design provides excellent shock resistance and allows them to adapt to low-speed, heavy-load conditions. The high strength and wear resistance of the brass or cast iron cage make them suitable for frequent start-stop and vibration environments.
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