Non Magnetic Bearings for MRI Equipment

Bearings for Medical Applications & Devices

A plastic race radial ball bearing fitted with borosilicate glass balls is the only type of ball bearing used in MRI patient tables . Its nonmetallic nature is required because the imaging area must remain nonmagnetic, or metal free. 

Critical Design Features: POM, PBT, or UHMW-PE plastic races and cage fitted with borosilicate balls for total nonmetallic construction. True Race Technology™ ball grooves reduce friction and improve performance. UHMW-PE  or Polyurethane can be used as the outer race wheel to reduce noise and be non marking when the bearing wheel runs on a hard track surface.

Additional reasons for use:

  • No lube required: The ability to run without lubrication is a benefit when cleanliness is a priority.
  • Integration & assemblies: KMS can design a custom housing to provide a complete assembly. Spherical profiles can be designed on the outer race of the bearing to create an “all in one” bearing wheel.

 non magnetic bearings for mri equipment

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Plastic Vs Steel

Cleanliness/Hygienic: Plastic bearings generally operate cleaner than metal bearings because they do not need lubrication, they are resistant to corrosion, and they can be washed down without the worry of re-lubing. This capability makes them a viable option for clean room environments, and wash down applications. A plastic bearing made from either PBT, PVDF or PEEK can be post sterilized by standard methods such as autoclave or Gamma.


Read all the benefits of Plastic vs Steel Bearings