Precision rotor shaft for X-ray tube anode rotation in medical imaging systems
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Length | 150–300 mm | Depends on anode diameter and bearing spacing; longer shafts for larger anodes. |
| Diameter | 20–50 mm | Bearing journal diameter; larger for higher torque transmission. |
| Surface Finish | 0.2–0.4 µm Ra | On bearing journals and sealing surfaces; rougher finish increases wear and vacuum leakage.ISO 1302 |
| Rotational Speed | 3000–10000 rpm | Continuous operation; higher speeds require better balance and material strength. |
| Runout Tolerance | 0.005–0.02 mm TIR | Total indicated runout at bearing journals; tighter tolerance reduces vibration and noise.ISO 1101 |
| Vacuum Compatibility | 1e-6–1e-9 mbar | Outgassing rate < 1e-9 mbar·L/s·cm²; materials must be vacuum-compatible to avoid contamination.ISO 21360 |
| Operating Temperature | 200–400 °C | At bearing surfaces; above 400°C, material creep and lubricant degradation occur. |
| Temperature | 200–400 °C | Outside this window: Below 200°C: risk of brittle fracture in some alloys; above 400°C: loss of hardness, increased creep, and bearing failure. |
| Vacuum Level | 1e-6–1e-9 mbar | Outside this window: Above 1e-6 mbar: increased outgassing, contamination of X-ray tube, and reduced insulation; below 1e-9 mbar: risk of arcing and material sublimation. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
The X-ray tube rotor assembly is a critical rotating component within medical X-ray tubes used in diagnostic imaging equipment.
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The rotor shaft provides the mechanical connection between the stator's electromagnetic field and the anode target, enabling high-speed rotation to distribute heat evenly across the anode surface during X-ray production.
X-ray tubes operate under high vacuum to prevent electrical arcing and maintain electron beam integrity. The rotor shaft must maintain dimensional stability and material properties under vacuum conditions while withstanding thermal cycling from room temperature to several hundred degrees Celsius.
Regular inspection for bearing wear, runout measurement, and vacuum integrity testing are essential. Lubrication is typically not required as most systems use dry or self-lubricating bearings compatible with vacuum environments.
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