CNC Turning Dental Mechanical Grinding Needle Hook 1MM Medical Hardware Accessory

Grinding tool pins used in dental equipment demand ultra-high precision, superior surface finish, and consistent long-term performance. Below are the key manufacturing challenges and optimized processing solutions.

• Stringent Geometric Accuracy: Dimensional tolerance controlled within ±0.005-0.01 mm, roundness and cylindricity within 0.005 mm, with strict requirements for coaxiality and radial runout.
• High Surface Quality Standards: Surface roughness must achieve Ra ≤ 0.8 μm, with high-end versions requiring Ra ≤ 0.2 μm.
• Material and Heat Treatment Difficulties: Common materials include 304/316L stainless steel and 40Cr or bearing steel, requiring precise heat treatment balancing hardness HRC 45-52 and toughness.
• Consistency in Mass Production: Stable dimensions, surface finish, and hardness across batches pose high requirements for machine rigidity and quality control.

Material preparation → CNC turning / Swiss-type machining → Heat treatment (quenching & tempering) → Centerless grinding / Double-surface grinding → Surface treatment (hard chrome plating, QPQ, electropolishing) → Fine lapping / burnishing → Full inspection

• Precision control: High-rigidity machines, precision fixtures, optimized parameters, online gauging, tool life management.
• Surface quality: Diamond wheels, post-grinding lapping or burnishing, controlled cutting heat.
• Heat treatment stability: Vacuum heat treatment, vertical mounting, multiple aging processes.
• Stainless steel machining: Special cutting fluid, reduced cutting speed, optimized feed to avoid adhesion and work hardening.

• 304/316L Stainless Steel: Ideal for biocompatibility and corrosion resistance; focus on reducing built-up edge and work hardening.
• 40Cr / Bearing Steel: For high hardness and wear resistance; requires strict heat treatment to avoid distortion.

• Dimension & form accuracy: Micrometer, projector, roundness tester for diameter, cylindricity, coaxiality, perpendicularity.
• Surface quality: Roughness tester, visual and microscopic inspection.
• Performance: Rockwell hardness, salt spray test, optional NDT for internal defects.

Manufacturing high-performance dental grinding tool pins relies on precision machinery, mature processes, and strict quality control. The focus is on maintaining micron-level accuracy and ultra-smooth surfaces while ensuring material stability and batch consistency.

• Total employees: 300 (20 technicians, 10 engineers, 15 quality control personnel)
• Equipment: Over 300 pieces
• Management: 8S management system
• Certifications: ISO9001 and TS16949 automotive certifications
• Major customers: Bo-sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar