Cool Stuff Being Made: Products Made by Heat Treating
This week’s Cool Stuff Being Made video – heat treating! “You will see on this 18-minute video the many things that we use every day that are heat treated. As they say, heat treating puts the spring in springs. It also strengthens the metal used in axes, knives, saws, aircraft landing gears, jet engines, space ship launchers, computers, agricultural implements and oil drilling and refining equipment, to name just some. There’s also a scene toward the end that shows how many everyday things are heat treated. You see form one of the scenes the difference between a drill bit that is heat treated and one that is not. The former works while the latter fails.” Link.
Mitch writes “The following is the basic pattern for building cantilevered structures with Pennies. Although it looks trivial, we can build amazing structures with these pillars. All penny columns are ten high, a “stack”. Two side-by-side pennies held in place by a penny above them is called a “triad”. Below is a stack with two triads resting on top.” Thanks Tim! 
Geo’s Super-slim, cool-lookin, EMI-shielding wallet – “Ever get tired of carrying around a huge honkin’ leather wallet? Want to impress your hipster friends with your wacky style? Worried about your credit cards getting erased by all those stray electromagnetic fields you’ve been hearing about? Then this is the wallet for you.” 
Hans Schepker’s mathematically correct glass and sculpture site is an excellent read – “All my stained glass work is based on geometry. Yes, it is math I am talking about! The following lines are a short explanation of the shapes I work with and a bit of theory around them.” Thanks 
Audio from the food hacking event we 
Katie says, “Keeping with the theme of craft sites, how about this site that has, amongst other things, a