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Large-Diameter Forged Shaft
Large-Diameter Forged Shaft
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This shaft type is typically selected for mills, heavy transmissions, turbines, rolling equipment, and other machinery requiring substantial shaft section. The forging process is focused on maintaining sound internal quality through a large diameter while leaving enough stock for rough and finish machining. It is well suited to projects that require custom shaft size beyond standard bar stock capability. Shaft forgings of this type are normally purchased when the final component must withstand torque, bending load, and repeated service while still allowing extensive machining of journals, steps, or connection features. The forging route gives the customer a more reliable starting form than standard bar stock, especially in larger diameters or custom lengths where material continuity becomes more important. Depending on the application, the shaft can be delivered as-forged, heat-treated, or rough machined to suit the downstream turning, drilling, keyway, or balancing sequence.
| Parameter | Description |
|---|---|
| Key Features | Large-section soundness, core quality, heat treatment uniformity |
| Typical Materials | 42CrMo4, 34CrNiMo6, 35CrMo, per drawing |
| Size Range | Diameter 300~1500mm / Length ≤10000mm / Unit Weight ≤100 tons |
| Typical Applications | Mill roll shafts, large motor main shafts, marine intermediate shafts, turbine shafts |
| Supply Condition | Quenched & tempered / Normalized & tempered / Rough machined (OD + faces) |
| Inspection & Docs | UT 100% full volume, mechanical properties, grain size, EN 10204 3.1 |
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