2. Product Features
High-precision manufacturing: Using advanced CNC machining technology and precision grinding technology, the roundness error of the ball head is controlled within ±0.002mm, and the surface roughness Ra≤0.2μm, ensuring close cooperation with supporting components to achieve precise rotation and positioning, meeting the stringent requirements of medical equipment for high-precision operation, such as the fine movement of surgical instruments.
Excellent corrosion resistance: Using medical-grade stainless steel materials such as 316L, through a special surface treatment process, a dense oxide film is formed, which can effectively resist the erosion of common disinfectants, human body fluids and other substances in the medical environment, avoid rust and damage of parts, extend service life, and ensure long-term stable operation of medical equipment.
High strength and wear resistance: After special heat treatment and strengthening, the parts have excellent strength and wear resistance. In frequent use and friction, they can still maintain good structural integrity and performance stability, which is suitable for medical equipment scenarios that require long-term and high-frequency operation.

Good biocompatibility: It is produced in strict accordance with medical industry standards. The material is non-toxic and harmless. It will not produce adverse reactions when in contact with human tissue. It can be safely used in medical equipment that directly contacts the human body, such as the joints of rehabilitation training equipment, to provide safety protection for patients.

Test items	Testing standards	Significance of detection
Roundness error	±0.002mm	Ensure accurate fit and flexible rotation of the ball head
Surface roughness	Ra≤0.2μm	Reduce friction and improve smooth operation
Corrosion resistance	Passed 72-hour salt spray test	Adapt to complex medical environments
Biocompatibility	Complies with ISO 10993 standards	Ensure safety of human contact

3. Product Details
Material and treatment: 316L medical grade stainless steel is mainly used, which contains molybdenum and has stronger corrosion resistance and biocompatibility than ordinary stainless steel. After the parts are formed, they are first subjected to solid solution treatment to improve their plasticity and toughness, and then the surface roughness is further reduced through electrolytic polishing process, the surface finish and corrosion resistance are enhanced, and finally passivation treatment is performed to form a dense protective film to improve the overall performance.
Manufacturing process: The five-axis linkage CNC machining center is used for turning and milling to accurately shape the shape and size of the ball head and the rod; the precision grinding process is used to finely polish the surface of the ball head to ensure extremely high accuracy and finish. During the production process, a three-coordinate measuring instrument is used to perform real-time detection of key dimensions and geometric tolerances, strictly control product quality, and ensure that every part meets the high standards of medical equipment.
Application areas: In surgical instruments, it can be used as the steering joint of the endoscope and the operating part of the surgical clamp to help doctors perform precise surgical operations; in rehabilitation equipment, it is used to manufacture joint connectors and adjustment parts of training equipment to provide patients with a flexible and comfortable rehabilitation training experience; in medical testing instruments, it is used as the trigger or positioning component of the sensor to ensure the accuracy and stability of the detection process.