Tip alignment is the single greatest indicator of tweezer quality. Even a 0.1mm misalignment reduces precision dramatically. This article explains how factories achieve the accuracy required for high-end beauty and medical applications.
1. CNC Machining for Consistent Geometry
Computer Numerical Control (CNC) equipment ensures:
Exact symmetry
Stable arm curvature
Repeatable alignment
This eliminates defects common in traditional stamping.
2. Manual Micro-Polishing
Skilled technicians refine:
Edge sharpness
Tip taper
Touchpoint smoothness
Manual polishing is what transforms a raw tweezer into a precision tool.
3. Alignment Testing Using Light-Gap Inspection
Technicians hold tweezers against a light source.
If a gap appears, alignment is off.
Premium factories repeat the test:
Before heat treatment
After heat treatment
After coating
4. Pressure Testing
Tweezers must maintain full alignment under pressure.
Weak metal or poor machining causes bending.
5. Packaging Protection
Tips are protected by:
Silicone caps
Molded trays
EVA foam inserts
This prevents misalignment during shipping.
Conclusion
Professional tip alignment requires CNC machining, micro-polishing, repeated visual inspection, and strong protective packaging. Buyers should always request sample testing reports before confirming mass production.