Copper Rotor: Diameter 40-120 mm, Runout Tolerance ≤0.01 mm

Component Specifications

Definition

A precision-engineered copper rotor component within medical X-ray tube anode assemblies, designed to rotate the anode target at high speeds (typically 3,000-10,000 RPM) while efficiently conducting heat away from the focal spot. This component ensures uniform thermal distribution, prevents localized overheating, and maintains imaging quality during radiographic procedures.

Working Principle

Operates through electromagnetic induction when integrated with stator windings, creating rotational torque to spin the anode target. The high thermal conductivity of copper (385 W/m·K) transfers heat from the tungsten target to cooling systems, while balanced mechanical design minimizes vibration for stable high-speed operation.

Materials

Oxygen-free high-conductivity (OFHC) copper (C10100/C10200) with 99.95%+ purity, sometimes alloyed with 0.1-0.3% silver for enhanced thermal stability. Surface may have nickel plating for oxidation resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	40-120 mm
Balance Grade	G2.5 per ISO 1940
Rotational Speed	3,000-10,000 RPM
Runout Tolerance	≤0.01 mm
Thermal Conductivity	≥385 W/m·K
Electrical Resistance	≤1.68 μΩ·cm at 20°C
Maximum Operating Temperature	300°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 1940-1, ASTM B152, IEC 60601-2-54

Parent Products

This component is used in the following industrial products

Medical X-Ray Tube Anode Assembly

Rotating anode assembly for medical X-ray tubes, designed for heat dissipation and electron bombardment.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal fatigue cracking
Bearing seizure due to inadequate lubrication
Imbalance causing vibration and image artifacts
Oxidation reducing thermal conductivity

FMEA Triads

Trigger: Insufficient cooling or excessive tube current
Failure: Thermal deformation leading to imbalance and vibration
Mitigation: Implement temperature sensors with automatic shutdown at 350°C, use silver-alloyed copper for higher thermal stability

Trigger: Contamination in bearing assembly
Failure: Increased friction and eventual rotor seizure
Mitigation: Cleanroom assembly, sealed bearing systems, regular lubrication maintenance

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.005 mm dimensional tolerance, G2.5 balance grade

Test Method

High-speed spin testing, thermal cycling, eddy current inspection for defects, radiographic testing for internal integrity

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Copper Rotor

Manufacturer profiles associated with Copper Rotor.

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Frequently Asked Questions

Why is copper used instead of other metals for X-ray tube rotors?

Copper offers exceptional thermal conductivity (385 W/m·K), second only to silver among practical metals, efficiently dissipating heat from the tungsten target to prevent melting and maintain imaging quality.

What maintenance does a copper rotor require?

Regular inspection for bearing wear, balance verification, and cleaning of oxidation. Replacement typically occurs every 2-5 years depending on usage intensity and operating conditions.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Copper Rotor