Tooth Setting: Tooth Setting (排咪)
The operation that fixes teeth onto the tape edge at a controlled pitch for metal and some moulded zippers. Tooth spacing, clamping pressure and alignment with the tape centre line determine smooth slider travel and interlocking quality. Uneven pitch creates tight spots and jamming, while shallow setting reduces single-tooth strength. The process is monitored continuously, and samples are tested for tooth retention and chain straightness.