09-02-2013, 09:06 PM
Brenda
The drill bit is a so-called Reuleaux triangle and if mounted in a special way that allows it to rotate off center it can make a hole that is practically square with minimally rounded corners. Looks linda like the rotor in Vankel engine except it is a bit different.
The drill bit is a so-called Reuleaux triangle and if mounted in a special way that allows it to rotate off center it can make a hole that is practically square with minimally rounded corners. Looks linda like the rotor in Vankel engine except it is a bit different.