What types of bearings are required in the medical industry?

The common types of bearings utilized in the medical industry encompass high-temperature magnetron bearings, high-speed dental drill bearings, and high-speed grinding drill bearings. These bearings have extensive applications in medical equipment, as detailed below:

1. High-temperature magnetron bearings: Principally employed in high-power, high-speed rotating anode X-ray electron tubes, their operational environment is characterized by a vacuum (1x10^-6 Pa), high temperatures (maximum ambient temperature of 550°C), and solid lubrication. The bearing materials typically comprise Cr13Mo4V, Cr4Mo4V, and other high-temperature-resistant materials. The structures usually consist of either deep groove ball bearings or full ball structures without cages, and the lubrication typically employs special high-temperature grease.

2. High-speed dental drill bearings: Mainly utilized in the turbine components of dental drill handpieces, the operational environment is characterized by a pressure of 0.25 mPa, high speed (35 - 400,000 revolutions per minute), low noise (below 70 decibels), and oil drip lubrication.

3. High-speed grinding drill bearings: Primarily used in handheld high-speed grinding components, the operational environment is characterized by low noise (below 60 decibels), an operating room environment (physiological saline, human body fluids, blood), high speed (5,000 - 100,000 revolutions per minute), and spray lubrication.

Furthermore, the bearings commonly employed in medical devices also include stainless steel bearings, which are widely applied in high-precision equipment such as gamma knives, CT machines, X-ray machines, etc. The characteristics of these bearings include large external dimensions, thin walls, long service life, high rotational accuracy (above P5), low vibration and noise, small starting friction torque, and high precision of the installation holes.