Products & Solutions

X-ray tube bearings

X-ray tube bearings from the market leader

myonic bearing units for X-ray tubes are used by the world’s leading manufacturers in OEM and replacement X-ray tubes to ensure the optimum generation of sharp, detailed images.

The ball bearing system developed by myonic ensures highly accurate, low-loss and vibration-free running in every position despite temperatures of up to 550°C.

All our X-ray tube bearings are suitable for vacuums and high temperatures. We guarantee this by using dry lubrication as well as special steels. Our production, assembly and quality facilities are designed to guarantee reliable supply to our customers worldwide.

Röntgenröhre

Our focus is our customers!

Numerous well-known manufacturers of X-ray equipment worldwide rely on the quality of myonic products. In close cooperation with our customers, we are solving even highly complex applications on a daily basis. By being close to our customers we understand their applications and can apply this experience into ever-improving products.

Siemens

Steeped in tradition, Siemens Healthcare GmbH is one of the world’s largest companies for medical technology.

www.siemens-healthineers.com

Based in the Netherlands, Royal Philips Electronics is the world’s leading company for healthcare, lifestyle and technology.

www.philips.de

Varex Imaging is the world’s premier independent supplier of X-ray tubes. The US company focuses its energy on saving lives.

www.vareximaging.com

Diagnostics / Mammography

Top quality is our standard

The stationary use of the tubes in diagnostics limits the mechanical demands and thus often allows a more simple construction of the tubes, which can lead to a high degree of standardization of the bearing design, e.g. with regard to the ball set and the design of the raceway geometries.

Various connection versions can be selected from the myonic standard portfolio. To limit the cost and time required for development, it is helpful to define the bearing design together during the tube concept design phase in order to use an existing bearing if possible.

X-ray checklist

For the design of an X-ray bearing unit tailored to your requirements, please contact myonic application engineering.

Technical data

Envelope Dimensions
Bearing flange and housing are according to customer request. Due to our great knowledge, we can support you in this respect.

High vacuum: 10-9 mbar
High temperature: up to 550°C
Load Carrying Capacity: Rotating Mass < 1.5 kg
G-forces: 0g
Design: Thermal Compensating / pre-loaded
Bearing Material: High temperature tool steel
Ball Material: High temperature tool steel
Housing Material: Stainless Steel
Speed Range: up to 10800rpm
Lubrication: dry film lubrication like Pb / Ag
Noise Specification: < 55 dBA with lead lubrication (depends on the internal requirements of the customer)
Low vibration yes
Electrical conductivity, high voltage yes

Technical Support
Customized bearing design with the experience of myonic
Rotor Dynamic Analysis – FFT analysis
Calculation of critical frequency
Bearing analysis

Mid-CT / vascular

Would you like a little more?

The possibility of recording X-ray images on electronic detectors allows a whole sequence of X-ray images to be taken in a very short time. Together with other factors, the longer switch-on time thus increases the demand on the system’s thermal capacity in order to prevent the rotating anode from overheating. Larger and heavier anode disks are used for this purpose, among other things.

In extreme cases, the tube is not only operated in a certain position, but swivelled in use or moved in a circular path around the patient in a CT unit.
In addition to the higher temperatures, the significantly higher mechanical loads must also be taken into account in the bearing design.

Here, myonic can draw on correspondingly larger dimensioned bearing components and solid lubricants optimized for temperatures up to 550°C.
It makes sense to start discussing the tube layout as early as possible in order to be able to use other existing components, such as bearing housings and connection components, if possible.

X-ray checklist

For the design of an X-ray bearing unit tailored to your requirements, please contact myonic application engineering.

X-Ray Mid-CT

Technical data

Envelope Dimensions
Bearing flange and housing are according to customer request. Due to our great knowledge, we can support you in this respect.

High vacuum: 10-9 mbar
High temperature: up to 550°C
Load Carrying Capacity: Rotating Mass < 4 kg
G-forces: 6g
Design: Thermal Compensating / pre-loaded
Bearing Material: High temperature tool steel
Ball Material: High temperature tool steel
Housing Material: Stainless Steel / copper-based metal
Speed Range: up to 10800rpm
Lubrication: dry film lubrication like Pb / Ag
Noise Specification: < 65 dBA with lead lubrication (depends on the internal requirements of the customer)
Low vibration yes
Electrical conductivity, high voltage yes

Technical Support
Customized bearing design with the experience of myonic
Rotor Dynamic Analysis – FFT analysis
Calculation of critical frequency
Bearing analysis

High-end CT

Load-Capacity taken to the Extreme

To generate the required number of images, the X-ray tube unit in a high-end CT scanner rotates around the patient at a frequency of up to 4 times per second.
By this means, the components experience lateral accelerations that can correspond to 50 times the acceleration due to gravity. At the same time, the rotating anode rotates around its own axis at up to 10,000 revolutions per minute.

The rotating anode must rotate completely vibration-free and with as little noise and losses as possible over the longest possible service life! The ball bearing units designed by myonic for this application safely absorb the forces acting on them and are specially conditioned for use in high vacuum at bearing temperatures of up to 550°C.

For optimum integration into the customer’s system, myonic engineers work very closely with the developers of the X-ray tubes to achieve the best customer-specific solution for the application.

X-ray checklist

For the design of an X-ray bearing unit tailored to your requirements, please contact myonic application engineering.

Rötgenröhrenlager
X-Ray

Technical data

Envelope Dimensions
Bearing flange and housing are according to customer request. Due to our great knowledge, we can support you in this respect.

High vacuum: 10-9 mbar
High temperature: up to 550°C
Load Carrying Capacity: Rotating Mass < 6 kg
G-forces: up to 50g
Design: Thermal Compensating / pre-loaded
Bearing Material: High temperature tool steel
Ball Material: High temperature tool steel
Housing Material: Stainless Steel / copper-based metal
Speed Range: up to 10800rpm
Lubrication: dry film lubrication like Pb / Ag
Noise Specification: < 65 dBA with lead lubrication (depends on the internal requirements of the customer)
Low vibration yes
Electrical conductivity, high voltage yes

Technical Support
Customized bearing design with the experience of myonic
Rotor Dynamic Analysis – FFT analysis
Calculation of critical frequency
Bearing analysis

Accessories

Components

The use of the bearing units in high vacuum at temperatures up to 550°C puts special demands on the bearing design and the materials used.

Over the past decades, myonic has built up a broad, and in some cases exclusive, supplier base for this purpose. This enables us to offer our customers solutions that go beyond pure rolling element bearing systems and thus significantly reduce the customer’s development and procurement costs.

Raw balls

There are only a very small number of independent ball mills in the world capable of producing the ball quality required for this application.

myonic works continuously with suppliers on technical and commercial improvement.
Due to supply contracts, some of which run for several years, myonic is also in a position to serve also large new projects.

Ball coating

The application in high vacuum excludes conventional bearing lubrication with grease or oil. This problem is solved by a layer of only about 0.1 micrometres of lead or silver on the balls or raceways.

The coating process required for this is otherwise used primarily in the space industry.

Our supplier coats components for use in X-ray tubes exclusively for myonic. Together with the tube manufacturers, the optimum layer thickness for the application and the manufacturing process is determined in tests.

Bearing housing

Not only are high demands placed on the bearing housing in terms of manufacturing quality, but even the basic material must meet special requirements.

Electrical and magnetic properties are just as much a focus as, for example, the highest material purity and absolute crack-free properties in order to avoid a loss of high vacuum. myonic procures specially melted steel alloys, powder metallurgical steels or copper alloys from the world’s leading manufacturers on the basis of our own very detailed specifications. In addition to mechanical processing, the necessary joining techniques such as welding are also available.

Our X-ray tube production and assembly in the clean room

Highest precision, quality and cleanliness are our daily business.

The production, assembly and quality facilities are set up to guarantee the reliable supply of myonic products to our worldwide customers with.

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