1. Material Selection - Choose medical-grade stainless steel (316L/304)
2. Deep Hole Drilling - Using specialized deep hole drilling equipment with internal cooling system
3. CNC Precision Machining - Multi-process precision machining ensuring dimensional accuracy
4. Heat Treatment - Stress relief treatment to ensure material stability
5. Precision Grinding - CNC grinding processing achieving high precision dimensions
6. Surface Polishing - Multi-step polishing process achieving mirror surface effect
7. Cleaning & Packaging - Ultrasonic cleaning + vacuum packaging

Our medical-grade long slender shafts are manufactured using premium 316L stainless steel through precision machining processes. The products feature excellent corrosion resistance and mechanical strength, with surface roughness reaching Ra0.4μm or higher standard. The specialized deep hole drilling process ensures internal surface smoothness while maintaining dimensional accuracy.

• Minimally Invasive Surgical Instruments: laparoscopic instrument transmission shafts
• Diagnostic Equipment: precision guide shafts for medical imaging devices
• Medical Robotics: precision transmission components for surgical robots
• Endoscopic Equipment: precision guide mechanisms
• Orthopedic Instruments: internal fixation device components

• Complies with ISO 13485 quality management system requirements
• Full-process quality tracking records
• Biomedical compatibility certification
• Sterilization validation support
• Customized specifications available

Dongguan Yu Lin Sen Metal Technology Co., Ltd.: Has obtained the GB/T 19001-2016/ISO 9001:2015 quality system certification, as well as the GB/T42061-2022/ISO 13485:2016 medical device quality system certification. Focuses on the research and production of non-standard metal medical device precision parts, mainly as machined metal products. It possesses dozens of high-precision engra-ving lathes and CNCequipment,including CNC numerical control, numerical control centering machine, automatic lathes, turningmilling combined machines, precision laser cutting processing of stainless steel capillary tubes and stainless steel thin-walled tubes for sec-ondary processing. Main materials: stainless steel tubes, stainless steel, copper, alu-minum alloy, etc. for non-standard processing and customization. Widely applied in tools, electronics, electri-cal appliances, medical devices, automotive parts, transportation, and other industries. The company has been recognized by the industry for its "quality-oriented, honest operation" philosophy, mainly providing non-standard part prototyping and batch production processing, supporting custom drawings and sample customization, etc. The process flow is stable and efficient, integrating industry and trade for rapid delivery, with craftsmanship spirit ensuring quality, without middlemen, excellent value for money, and the company adheres to the business philosophy of "customer first, quality first, striving for excellence, win-win coopera-tion", "Confident and reliable after-sales guarantee!!!".

It has obtained the quality system certification in accordance with GB/T 19001-2016/ISO 9001:2015, as well as the medical device quality system certification in accordance withGB/T 42061-2022/ISO13485:2016. We focus on processing and customizing products for medical device hardware, and we have dozens of preci-sion CNC lathes and precision laser cutting processing equipment. We also have a R&D team composed of senior engineers and technicians. We are committed to providing customers with high-quality and high-precision processing and customization services for hardware parts, ensuring that each product meets the strict standards and requirements of the medical device industry. Through continuous optimization of production processes and improvement of technical levels, we can meet the diverse needs of customers and contribute to the development of the medical device industry.