Technical Features and Specifications
| Feature | Detail |
|---|---|
| Materials | Stainless Steel, Alloy Steel, Titanium Alloys. |
| Manufacturing | Mandrel forging or deep-hole boring. |
| Precision | Concentricity of ID and OD within microns. |
Hollow shafts are also used for "passage" cooling, where fluids or gases are pumped through the center of the shaft to manage heat in gas turbines or high-performance electric motors. The internal surface is polished to prevent any "stress risers" that could lead to internal cracking.
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Development Conceptscientific and technological innovation as the driving force. -
Quality PolicyPeople, integrity, truth-seeking, innovation -
Core ValueCommon development to achieve symbiosis and win-win.
Buying Tips
- Concentricity: Ensure the ID and OD are perfectly centered to prevent "wobble" at high RPMs.
- Internal Finish: If used for cooling, specify the internal roughness (Ra) to prevent scale buildup.
- Weight Saving: Use hollow shafts to reduce the load on support bearings and increase the efficiency of the drive system.
Advantages of Hollow Forgings
| Advantage | Operational Benefit |
|---|---|
| Weight Reduction | Increases the payload and efficiency of vehicles and ships. |
| Cooling Efficiency | Allows for internal thermal management of the drive train. |
| High Speed | Lower inertia allows for faster acceleration and deceleration. |
Primary Applications
| Industry | Usage Context |
|---|---|
| Marine Propulsion | Main propeller shafts for high-speed vessels. |
| Power Generation | Rotor shafts for high-efficiency gas turbines. |
| Aerospace | Main engine shafts for jet turbines. |
- Q: How are these forged?
- A: Usually by "mandrel forging," where a hole is punched in the billet and then forged over a steel bar (the mandrel) to expand the diameter.

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