Gears are used to get things moving. Gears are one of the oldest tools around for transmitting motion. They are, in fact, behind most of your favorite moving items : trains, cars, watches, etc. American cartoonist Charles Schultz once said, “Life is like a ten speed bicycle. Most of us have gears we never use.” So get familiar with the gears that be and explore the possibilities!
A bevel gear is the kind of thing you might find in a hand drill. Spiral bevel gears have curved teeth and are usually set to meet eachother at a 90* angle. This way, a bevel gear and actually change the direction of movement by 90* just by changing directions. A bevel gear is usually shaped like a cone so that it can easily change directions. (more…)
Nov 17 2014