Enhanced cleanliness requirements for joint bearings in medical robots drive expanded adoption of vacuum lubrication technology.
2026-02-12 10:15
In the field of medical robotics, cleanliness requirements for joint bearings are continuously being raised in tandem with technological advancements. Given that medical robots are often deployed in high-cleanliness environments such as operating rooms and sterile laboratories, their joint bearings must meet increasingly stringent cleanliness standards. For instance, the joint bearings in surgical robot arms are required to achieve angular control at the 0.1° level; even minute particulate contamination within the bearing can degrade motion accuracy and compromise surgical success rates. Consequently, the cleanliness of joint bearings in medical robots must comply with ISO 14644 Class 100 to Class 10,000, which stipulates that the concentration of particles ≥0.5 μm per cubic meter of air must be maintained between 3,500 and 3.5 million, depending on the specific application.
To meet this demand, vacuum lubrication technology is being increasingly adopted in joint bearings for medical robots. This technology uses vacuum grease to minimize lubricant volatilization, thereby preventing particulate contamination that can arise with conventional lubrication methods, while reducing the bearing friction coefficient to as low as 0.001 and extending service life to over 100,000 hours. For instance, when vacuum lubrication is applied to the rotary gantry bearings of MRI systems, maintenance frequency is reduced, and the risk of cleanliness degradation due to lubricant volatilization is significantly mitigated. Moreover, the use of advanced materials such as silicon nitride ceramics further enhances bearing corrosion resistance and anti-contamination performance, providing robust technical support for elevating the cleanliness standards of joint bearings in medical robotics.
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