It’s only natural. Whenever we want to put two things together, we reach for the glue. And there’s nothing wrong about that! But wouldn’t it feel much sweeter and special if you could assemble an object, simply by pressing it into each other like Lego? Most material can do this, if they are shaped properly, and wood is exceptionally good at doing this. ThisWoodwork made this mirror by fitting pieces of wood together. Sure, he used glue for the ornament, but the main construct doesn’t need it. It just fit into each other like they were ment to be together! If the tolerances are good, you don’t need any glue. And if the tolerances are bad, chances are you can fix it with a file or a piece of masking tape!
Most electrical motors uses electromagnetism in order to transform electricity into mechanical work, but there’s another type of motor, the electrostatic motor, that works differently. Instead of using magnetism, electrostatic motors uses high voltage to attract and repel parts of the motor, causing them to turn. There are many ways of making such motors, but most tend to have very low strength and torque. There are the exception to this rule though, and in these videos from RimstarOrg one such exception is studied in detail. It is called the “Corona motor” and apart from being cheap to build, it also have high enough strength and torque to be a viable motor for practical applications! The downside is that it needs very high voltages, and if you try this build, be extremely careful not to get a shock! And if all possible, avoid using high voltage transformers that plug into the wall socket. They can kill. We are not kidding.
If you own a table saw and just use it for straight cutting, you are missing out. A table saw can be a very versatile tool if you know how to use it right. While making a gorgeus frame for a picture, Matthias Wandel beautifully demonstrates several tricks and techniques that you need to know about. So watch this video and lock up the true potential of your table saw!
While making their wooden swords look like they were made from metals, Adam Savage doesn’t just demonstrates to Norm from Tested.com how aluminium tape can give any object that nice metallic look, he also show us how it can be buffed with steel wool to make it look “brushed”. We also get to see how plumbers epoxy work, and how to cut neat leather laces with minimum work, using a leather lace cutter. Finally, Adam reveals what drill bit is his favorite and why.