How Does a Zipper Work? Inside the Hidden Slider | 3D Explained

One pull joins two rows of teeth. Reverse it, and they separate. What happens inside that tiny slider? Go inside a zipper with ProcessLens. This 3D cutaway reveals the hidden Y-shaped channel, follows the teeth as they engage, and shows how their shapes resist a sideways pull. Discover the separate locking pin, why a zipper can split behind its slider, and how metal, molded and coil constructions differ. CHAPTERS 00:00 Inside the zipper 00:23 Three parts doing different jobs 00:51 Why teeth have a head and a neck 01:18 The hidden Y-shaped channel 01:45 Follow one tooth through the slider 02:19 How the closed chain holds together 02:51 How the zipper opens 03:18 The separate slider lock 03:46 Why a zipper splits 04:14 Metal, molded and coil designs 04:50 Why small clearances matter 05:19 The complete mechanism This animation shows an enlarged representative mechanism. Element shapes, local bending and fault clearances are simplified for explanation. Zipper and lock designs vary. Subscribe to ProcessLens for more 3D engineering animations revealing hidden mechanisms inside everyday objects. #Zipper #HowItWorks #ProcessLens