I need help to understand everytype of fit used in assemblies in plastic , how much clearance shud be used to mate the parts i am very confused please guide my path . if possible wanna go deep

help needed

2 Answers

I have some PDFs in my personal laptop. I can find it for you when I am home. In general you can find some very good information in the PDF here.

http://fab.cba.mit.edu/classes/S62.12/people/vernelle.noel/Plastic_Snap_fit_design.pdf

Fantastic details on many types of fits.

Check this link too. The fits are thought out for 3D Printing but you can learn quite a lot from here too.
https://www.sculpteo.com/blog/2018/04/25/how-to-connect-two-parts-with-3d-printed-joints-and-snap-fits/?