Manufacturing guy-at-large.

Coined Countersinks

Added on by Spencer Wright.

This blew my mind! 

A supplier of The Public Radio's stamped lid sent me a catalog of stamping tools, and I took a little while looking though it. This page set me on a google wormhole:

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They're talking here about cold working countersink features in sheet metal. The hole is pre-punched and then worked with a tool that moves material around to create a countersink.

This process probably isn't right for The Public Radio - it requires thicker material than we're using - but it's really cool. I googled around a bit and found a textbook on countersinks, which describes a bunch of sheet metal features that I was unaware of:

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It would be really fun to explore these. Stamping is really economical at scale, and knowing all the ways it can be used is super interesting.