Integrated Bearings for Medical Devices

integrated bearingsA plastic radial ball bearing is used in a robotic catheter positioning controller system.  A plastic ball bearing was chosen because it could be integrated with the pulley drive system to allow it to fit into a limited space. The bearing can be sterilized and disposed of after a single use procedure. The plastic ball bearing’s ability to run without lubrication, and not rust was ideal for this medical application.

Critical Design Features: PBT polyester plastic races fitted with 316 stainless balls. Double Bearing construction features True Race Technology™ ball grooves, and cage type construction for reduced friction and smooth performance.

integrated bearing

Additional reasons for use:

  • A KMS plastic ball bearing is 1/5 the weight of a steel bearing requiring less torque for operation and reduced overall weight.
  • Nonmetallic options available.


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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