INDUSTRY COMPONENT

Bearings

High-precision bearings for X-ray tube rotor assemblies enabling smooth rotation and minimal vibration in medical imaging equipment.

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Component Specifications

Definition
Specialized bearings designed for X-ray tube rotor assemblies that support high-speed rotation of the anode while maintaining precise alignment, managing thermal expansion, and minimizing mechanical vibration to ensure consistent image quality in diagnostic imaging systems. These components operate in vacuum or controlled environments with specific lubrication requirements.
Working Principle
Bearings in X-ray tube rotor assemblies reduce friction between rotating and stationary parts through rolling elements (balls or rollers) that distribute loads evenly. They maintain precise concentricity while accommodating thermal expansion from high operating temperatures (up to 300°C), enabling the anode to rotate at 3,000-10,000 RPM with minimal wobble for consistent X-ray generation.
Materials
High-grade bearing steel (AISI 52100 or equivalent), ceramic hybrid options (silicon nitride balls with steel races), special coatings (chrome plating or DLC), high-temperature lubricants (perfluoropolyether or specialized greases), and corrosion-resistant cages (bronze or polymer composites).
Technical Parameters
ParameterTypical rangeNotes & selection driver
Width10-30 mm
ClearanceC3/C4 for thermal expansion
LubricationHigh-temperature grease or oil-mist systems
Speed RatingUp to 15,000 RPM
Bore Diameter10-50 mm
Load CapacityDynamic: 5-20 kN, Static: 3-15 kN
Outer Diameter30-100 mm
Precision GradeABEC 7 or higher (P4/P2)
Operating Temperature-40°C to 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 15242, ISO 492, DIN 625, DIN 5402

Parent Products

This component is used in the following industrial products

X-Ray Tube Rotor Assembly

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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Refrigerator Evaporator Fan Motor

Compact electric motor for circulating air across refrigerator evaporator coils.

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Drying Cylinder

A rotating cylindrical component that removes moisture from materials through heat transfer and evaporation.

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Engineering Analysis

Risks & Mitigation
  • Catastrophic bearing failure causing tube replacement
  • Increased vibration degrading image quality
  • Lubricant breakdown at high temperatures
  • Thermal expansion causing binding
  • Corrosion in humid environments
FMEA Triads
Trigger: Lubricant degradation at high operating temperatures
Failure: Increased friction leading to overheating and eventual seizure
Mitigation: Use high-temperature rated lubricants, implement temperature monitoring, and follow scheduled maintenance
Trigger: Contamination from tube arcing or debris
Failure: Pitting and premature wear of bearing surfaces
Mitigation: Maintain clean assembly environment, use sealed bearing designs, and implement filtration systems
Trigger: Improper installation causing misalignment
Failure: Uneven load distribution and reduced bearing life
Mitigation: Follow precise installation procedures, use alignment tools, and verify concentricity after assembly

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Radial runout < 0.005 mm, axial play < 0.01 mm, concentricity < 0.003 mm
Test Method
Vibration analysis (ISO 15242), thermal cycling tests, accelerated life testing with load simulation, lubricant performance validation

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
Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Bearings

Manufacturer profiles associated with Bearings.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What makes X-ray tube bearings different from standard industrial bearings?

X-ray tube bearings operate in vacuum or controlled environments, withstand higher temperatures (up to 300°C), require specialized high-temperature lubricants, and must maintain extreme precision (ABEC 7 or higher) to prevent image artifacts from mechanical vibration.

How often should X-ray tube bearings be replaced?

Typically 3-7 years depending on usage intensity, but monitoring through vibration analysis and thermal imaging can predict failure. Preventive replacement is recommended when wear indicators exceed manufacturer specifications.

Can ceramic bearings improve X-ray tube performance?

Yes, ceramic hybrid bearings (silicon nitride balls with steel races) reduce friction, handle higher temperatures better, and have longer service life, though at higher initial cost.

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.

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