LM742749DW.714.714D Bore 215.9 Mm, Tapered Roller Bearings, Four Row For Rolling Mills
The LM742749DW.714.714D Four-row tapered roller bearings are suitable for applications involving heavy combined loads. Classic applications include rolling mill work rolls, heavy machine tool spindles, mining crushers, oil drilling rig turntables, large wind turbine spindles, and shaft positioning ends of ship propulsion systems.
The LM742749DW.714.714D bearing is a Tapered Roller Bearings, four row for Rolling Mills (in inch dimensions) with an inner diameter of 215.9 mm , an outer diameter of 288.925 mm, a width of 177.8 mm. Bearing steel rings, Bearing steel rolling mlement. It primarily bears Radial and axial loads, Its dynamic radial rated load is approximately 1460000 N, its static radial rated load is approximately 3200000 N. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
LM742749DW.714.714D bearings ( 215.9 mm x 288.925 mm x 177.8 mm) have the advantages of It can withstand extremely high radial loads and bidirectional axial loads, has a compact structure, and is highly rigid, making it suitable for heavy-duty impact conditions, and are therefore widely used in the Metallurgical rolling mills, large gearboxes, heavy mining machinery, oil drilling equipment.
| Part Number | LM742749DW.714.714D |
| Interchangeable | TIMKEN LM742749DW.714.714D |
| Desgin Figure | 1 |
| Cage | Stamping steel cage |
| Seal | Open |
| Bearing Type | Tapered Roller Bearings, four row for Rolling Mills (in inch dimensions) |
| Design type | TQO |
| Bearing Weight [lb] | 73.413 |
| d φ Inside [inch] | 8.500 |
| D Φ Outside [inch] | 11.375 |
| B Width [inch] | 7.000 |
| Bi Width [inch] | 7.000 |
| rs min Chamfer Cup | 3.3 mm |
| r1s min Chamfer Cone | 0.8 mm |
| Cr Radial Dynamic [lbf] | 328208 |
| C0r Radial Static [lbf] | 719360 |
| Cr90 Equivalent load rating [lbf] | 82052 |
| Ca90 Equivalent load rating [lbf] | 19445 |
| Factor | |
| e | 0.48 |
| K Thrust factor | 1.21 |
The LM742749DW.714.714D Four-row tapered roller bearings typically consist of two double-raceway outer rings, two single-raceway inner rings, four rows of tapered rollers, a cage, and a spacer. The inner and outer rings and rollers are designed in metric or imperial units. The axial clearance or preload can be precisely adjusted by grinding the spacer.
The advantage of four-row tapered roller bearings is that they can withstand huge radial loads and bidirectional axial loads at the same time. They have extremely high overall rigidity and excellent load-bearing capacity, making them suitable for use as fixed ends to achieve precise axial positioning. However, their limiting speed is relatively lower than that of cylindrical roller bearings.
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